reflow-oven-control-pcb/frontend.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 2 4
Title "Reflow Oven Controller"
Date "2020-02-18"
Rev "v1.3.1"
Comp "Shimatta"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text HLabel 10000 1300 2    50   Output ~ 0
FORCE+
Text HLabel 10000 1600 2    50   Output ~ 0
FORCE-
Text HLabel 10000 1400 2    50   Input ~ 0
SENS+
Text HLabel 10000 1500 2    50   Input ~ 0
SENS-
Text Label 7150 1300 0    50   ~ 0
F+
Text Label 7150 1400 0    50   ~ 0
S+
Text Label 7150 1500 0    50   ~ 0
S-
Text Label 7150 1600 0    50   ~ 0
F-
Wire Wire Line
	4550 1450 4500 1450
Wire Wire Line
	4500 1450 4500 1750
Wire Wire Line
	4500 1750 5150 1750
Text Label 6350 1750 2    50   ~ 0
F-
Wire Wire Line
	6050 1750 6050 1800
Connection ~ 6050 1750
Wire Wire Line
	6050 1750 6350 1750
$Comp
L Device:R R22
U 1 1 5D90BA7B
P 6050 1950
F 0 "R22" H 6120 1996 50  0000 L CNN
F 1 "1k 0.1%" H 6120 1905 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 5980 1950 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 6050 1950 50  0001 C CNN
F 4 "284-APC0603B1K00N" H 6050 1950 50  0001 C CNN "MouserPartNo"
	1    6050 1950
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR045
U 1 1 5D90C0A7
P 6050 2150
F 0 "#PWR045" H 6050 1900 50  0001 C CNN
F 1 "GND" H 6055 1977 50  0000 C CNN
F 2 "" H 6050 2150 50  0001 C CNN
F 3 "" H 6050 2150 50  0001 C CNN
	1    6050 2150
	1    0    0    -1  
$EndComp
Wire Wire Line
	6050 2150 6050 2100
Wire Wire Line
	9150 4750 9150 4600
Wire Wire Line
	9150 4600 9350 4600
Connection ~ 9150 4600
Wire Wire Line
	9150 4600 9150 4500
$Comp
L Device:C C25
U 1 1 5D910C4E
P 9500 4600
F 0 "C25" V 9248 4600 50  0000 C CNN
F 1 "100n" V 9339 4600 50  0000 C CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 9538 4450 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/40/AutoMLCC-777028.pdf" H 9500 4600 50  0001 C CNN
F 4 "581-06031C104K4T2A" H 9500 4600 50  0001 C CNN "MouserPartNo"
	1    9500 4600
	0    1    1    0   
$EndComp
Wire Wire Line
	9650 4600 9800 4600
Wire Wire Line
	9800 4600 9800 4650
$Comp
L power:GND #PWR050
U 1 1 5D912645
P 9800 4650
F 0 "#PWR050" H 9800 4400 50  0001 C CNN
F 1 "GND" H 9805 4477 50  0000 C CNN
F 2 "" H 9800 4650 50  0001 C CNN
F 3 "" H 9800 4650 50  0001 C CNN
	1    9800 4650
	1    0    0    -1  
$EndComp
Text Label 6350 1350 2    50   ~ 0
F+
$Comp
L Device:C C21
U 1 1 5D918057
P 5500 1550
F 0 "C21" H 5615 1596 50  0000 L CNN
F 1 "22n" H 5615 1505 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 5538 1400 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/40/X7RDielectric-777024.pdf" H 5500 1550 50  0001 C CNN
F 4 "581-0603ZC223KAT2A" H 5500 1550 50  0001 C CNN "MouserPartNo"
	1    5500 1550
	1    0    0    -1  
$EndComp
Wire Wire Line
	5500 1700 5500 1750
Connection ~ 5500 1750
Wire Wire Line
	5500 1750 6050 1750
Wire Wire Line
	5500 1400 5500 1350
Connection ~ 5500 1350
Wire Wire Line
	5500 1350 6350 1350
$Comp
L Device:R R12
U 1 1 5D929598
P 2700 900
F 0 "R12" H 2770 946 50  0000 L CNN
F 1 "150" H 2770 855 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 2630 900 50  0001 C CNN
F 3 "" H 2700 900 50  0001 C CNN
	1    2700 900 
	1    0    0    -1  
$EndComp
Wire Wire Line
	2500 1550 2500 1300
Wire Wire Line
	2500 1300 2700 1300
Connection ~ 2700 1300
Wire Wire Line
	2700 1300 2700 1450
$Comp
L power:GND #PWR040
U 1 1 5D92E1A1
P 2700 2100
F 0 "#PWR040" H 2700 1850 50  0001 C CNN
F 1 "GND" H 2705 1927 50  0000 C CNN
F 2 "" H 2700 2100 50  0001 C CNN
F 3 "" H 2700 2100 50  0001 C CNN
	1    2700 2100
	1    0    0    -1  
$EndComp
Wire Wire Line
	3850 1850 3850 1700
$Comp
L Device:C C19
U 1 1 5D932D1C
P 3850 1550
F 0 "C19" H 3965 1596 50  0000 L CNN
F 1 "1u" H 3965 1505 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 3888 1400 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/212/KEM_C1002_X7R_SMD-1102033.pdf" H 3850 1550 50  0001 C CNN
F 4 "80-C0603C105K4RLR" H 3850 1550 50  0001 C CNN "MouserPartNo"
	1    3850 1550
	1    0    0    -1  
$EndComp
Wire Wire Line
	3850 1400 3850 1250
Wire Wire Line
	3850 1250 4150 1250
$Comp
L Device:R R14
U 1 1 5D9371CC
P 3600 1250
F 0 "R14" V 3393 1250 50  0000 C CNN
F 1 "24k 0.1%" V 3484 1250 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 3530 1250 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/418/4/NG_DS_1773270-2_A-1534319.pdf" H 3600 1250 50  0001 C CNN
F 4 "279-RQ73C1J24K9BTDF" H 3600 1250 50  0001 C CNN "MouserPartNo"
	1    3600 1250
	0    1    1    0   
$EndComp
Wire Wire Line
	3750 1250 3850 1250
Connection ~ 3850 1250
Wire Wire Line
	2700 700  2700 750 
Wire Wire Line
	4150 1250 4150 1400
Connection ~ 4150 1250
Wire Wire Line
	4150 1250 4550 1250
$Comp
L Device:R R19
U 1 1 5D947159
P 4150 1550
F 0 "R19" H 4220 1596 50  0000 L CNN
F 1 "1k 0.1%" H 4220 1505 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 4080 1550 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 4150 1550 50  0001 C CNN
F 4 "284-APC0603B1K00N" H 4150 1550 50  0001 C CNN "MouserPartNo"
	1    4150 1550
	1    0    0    -1  
$EndComp
Wire Wire Line
	4150 1700 4150 1850
Wire Wire Line
	4150 1850 3850 1850
Wire Wire Line
	7150 1600 8200 1600
Wire Wire Line
	7150 1500 8050 1500
Wire Wire Line
	7150 1400 7650 1400
Wire Wire Line
	7150 1300 8200 1300
Wire Wire Line
	3400 1250 3400 1200
Wire Wire Line
	3400 850  3550 850 
Wire Wire Line
	3400 1250 3450 1250
$Comp
L Device:R R17
U 1 1 5D9B187D
P 3700 850
F 0 "R17" V 3493 850 50  0000 C CNN
F 1 "0" V 3584 850 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 3630 850 50  0001 C CNN
F 3 "" H 3700 850 50  0001 C CNN
	1    3700 850 
	0    1    1    0   
$EndComp
Text Label 4100 850  2    50   ~ 0
VREF
$Comp
L Device:C C20
U 1 1 5D9BF43F
P 4250 850
F 0 "C20" V 3998 850 50  0000 C CNN
F 1 "1u" V 4089 850 50  0000 C CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 4288 700 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/212/KEM_C1002_X7R_SMD-1102033.pdf" H 4250 850 50  0001 C CNN
F 4 "80-C0603C105K4RLR" H 4250 850 50  0001 C CNN "MouserPartNo"
	1    4250 850 
	0    1    1    0   
$EndComp
Wire Wire Line
	3850 850  4100 850 
$Comp
L power:GND #PWR043
U 1 1 5D9BFEE1
P 4500 900
F 0 "#PWR043" H 4500 650 50  0001 C CNN
F 1 "GND" H 4505 727 50  0000 C CNN
F 2 "" H 4500 900 50  0001 C CNN
F 3 "" H 4500 900 50  0001 C CNN
	1    4500 900 
	1    0    0    -1  
$EndComp
Wire Wire Line
	4500 900  4500 850 
Wire Wire Line
	4500 850  4400 850 
Wire Wire Line
	9150 1050 10000 1050
Text HLabel 10000 1050 2    50   Output ~ 0
VREF
Text Label 9150 1050 0    50   ~ 0
VREF
Text Label 750  3500 0    50   ~ 0
S+
Text HLabel 7550 3900 2    50   Output ~ 0
TEMP_OUT
Text Notes 5450 750  0    100  ~ 20
Use low drift types for the marked resistors
Wire Notes Line
	5900 1650 5900 2150
Wire Notes Line
	5900 2150 6550 2150
Wire Notes Line
	6550 2150 6550 1650
Wire Notes Line
	6550 1650 5900 1650
Wire Notes Line
	4000 1400 4550 1400
Wire Notes Line
	4550 1400 4550 1750
Wire Notes Line
	4550 1750 4000 1750
Wire Notes Line
	4000 1750 4000 1400
Wire Notes Line
	3400 950  3400 1350
Wire Notes Line
	3400 1350 3750 1350
Wire Notes Line
	3750 1350 3750 1000
Wire Notes Line
	3750 1000 3400 1000
Wire Wire Line
	750  3500 1050 3500
Text Label 7050 3900 0    50   ~ 0
TEMP_OUT
$Comp
L Device:C C23
U 1 1 5E2394E4
P 6900 4650
F 0 "C23" V 7152 4650 50  0000 C CNN
F 1 "Bridge" V 7061 4650 50  0000 C CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 6938 4500 50  0001 C CNN
F 3 "" H 6900 4650 50  0001 C CNN
	1    6900 4650
	1    0    0    -1  
$EndComp
Wire Wire Line
	6900 4800 6900 4900
$Comp
L power:GND #PWR046
U 1 1 5E241AC0
P 6900 4900
F 0 "#PWR046" H 6900 4650 50  0001 C CNN
F 1 "GND" H 6905 4727 50  0000 C CNN
F 2 "" H 6900 4900 50  0001 C CNN
F 3 "" H 6900 4900 50  0001 C CNN
	1    6900 4900
	1    0    0    -1  
$EndComp
Wire Wire Line
	2700 1650 2700 2050
$Comp
L power:GND #PWR041
U 1 1 5E102FCD
P 3850 2150
F 0 "#PWR041" H 3850 1900 50  0001 C CNN
F 1 "GND" H 3855 1977 50  0000 C CNN
F 2 "" H 3850 2150 50  0001 C CNN
F 3 "" H 3850 2150 50  0001 C CNN
	1    3850 2150
	1    0    0    -1  
$EndComp
Wire Wire Line
	3850 2150 3850 1850
Connection ~ 3850 1850
Wire Wire Line
	2500 1550 2600 1550
Wire Wire Line
	2400 2050 2700 2050
Connection ~ 2700 2050
Wire Wire Line
	2700 2050 2700 2100
Wire Wire Line
	2400 1750 2400 1550
Wire Wire Line
	2400 1550 2500 1550
Connection ~ 2500 1550
$Comp
L Device:C C15
U 1 1 5E232923
P 1050 4200
F 0 "C15" H 1165 4246 50  0000 L CNN
F 1 "10n" H 1165 4155 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 1088 4050 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/40/licc-776614.pdf" H 1050 4200 50  0001 C CNN
F 4 "581-03063C103K4T2A" H 1050 4200 50  0001 C CNN "MouserPartNo"
	1    1050 4200
	1    0    0    -1  
$EndComp
Wire Wire Line
	2450 3700 2450 3600
Connection ~ 2450 3600
Text Label 750  4900 0    50   ~ 0
S-
Wire Wire Line
	750  4900 1050 4900
$Comp
L Device:R R10
U 1 1 5E292BD1
P 1450 4400
F 0 "R10" H 1520 4446 50  0000 L CNN
F 1 "1k 0.1%" H 1520 4355 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1380 4400 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 1450 4400 50  0001 C CNN
F 4 "284-APC0603B1K00N" H 1450 4400 50  0001 C CNN "MouserPartNo"
	1    1450 4400
	1    0    0    -1  
$EndComp
$Comp
L Device:R R9
U 1 1 5E292BD7
P 1450 4050
F 0 "R9" H 1520 4096 50  0000 L CNN
F 1 "1k 0.1%" H 1520 4005 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1380 4050 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 1450 4050 50  0001 C CNN
F 4 "284-APC0603B1K00N" H 1450 4050 50  0001 C CNN "MouserPartNo"
	1    1450 4050
	1    0    0    -1  
$EndComp
$Comp
L Device:R R15
U 1 1 5E333B2A
P 3600 3600
F 0 "R15" H 3670 3646 50  0000 L CNN
F 1 "1k 0.1%" H 3670 3555 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 3530 3600 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 3600 3600 50  0001 C CNN
F 4 "284-APC0603B1K00N" H 3600 3600 50  0001 C CNN "MouserPartNo"
	1    3600 3600
	0    1    1    0   
$EndComp
Wire Wire Line
	3750 3600 4000 3600
Wire Wire Line
	4000 3600 4000 3800
$Comp
L Device:R R18
U 1 1 5E352DB6
P 4000 3250
F 0 "R18" H 4070 3296 50  0000 L CNN
F 1 "5k 0.1%" H 4070 3205 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 3930 3250 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/447/PYu-RT_1-to-0.01_RoHS_L_11-1669912.pdf" H 4000 3250 50  0001 C CNN
F 4 "603-RT0603BRE075KL
" H 4000 3250 50  0001 C CNN "MouserPartNo"
	1    4000 3250
	1    0    0    -1  
$EndComp
Wire Wire Line
	4000 3100 4000 3050
$Comp
L power:GND #PWR042
U 1 1 5E35E6EA
P 4000 3050
F 0 "#PWR042" H 4000 2800 50  0001 C CNN
F 1 "GND" H 4005 2877 50  0000 C CNN
F 2 "" H 4000 3050 50  0001 C CNN
F 3 "" H 4000 3050 50  0001 C CNN
	1    4000 3050
	-1   0    0    1   
$EndComp
$Comp
L Device:R R16
U 1 1 5E381FD9
P 3600 4450
F 0 "R16" H 3350 4500 50  0000 L CNN
F 1 "1k 0.1%" H 3250 4400 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 3530 4450 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 3600 4450 50  0001 C CNN
F 4 "284-APC0603B1K00N" H 3600 4450 50  0001 C CNN "MouserPartNo"
	1    3600 4450
	0    -1   -1   0   
$EndComp
Wire Wire Line
	4350 4350 5600 4350
Connection ~ 4350 4350
Wire Wire Line
	4350 4350 4350 4000
$Comp
L Device:R R21
U 1 1 5E3A5DAA
P 5600 4200
F 0 "R21" H 5670 4246 50  0000 L CNN
F 1 "5k 0.1%" H 5670 4155 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 5530 4200 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/447/PYu-RT_1-to-0.01_RoHS_L_11-1669912.pdf" H 5600 4200 50  0001 C CNN
F 4 "603-RT0603BRE075KL
" H 5600 4200 50  0001 C CNN "MouserPartNo"
	1    5600 4200
	-1   0    0    1   
$EndComp
Wire Wire Line
	5600 4050 5600 3900
Connection ~ 5600 3900
Wire Notes Line
	5200 3950 5700 3950
Wire Notes Line
	5700 3950 5700 4300
Wire Notes Line
	5700 4300 5200 4300
Wire Notes Line
	5200 4300 5200 3950
Wire Notes Line
	4450 3400 3900 3400
Wire Notes Line
	3900 3100 4450 3100
Wire Notes Line
	3800 4000 3400 4000
Wire Notes Line
	3400 4000 3400 3500
Wire Notes Line
	3400 3500 3800 3500
Wire Notes Line
	3800 3500 3800 4000
$Comp
L Reference_Voltage:TL431DBZ U7
U 1 1 5E5592F3
P 2700 1550
F 0 "U7" V 2746 1480 50  0000 R CNN
F 1 "TL431LI-DBZ" V 2655 1480 50  0000 R CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 2700 1400 50  0001 C CIN
F 3 "http://www.ti.com/lit/ds/symlink/tl431.pdf" H 2700 1550 50  0001 C CIN
F 4 "595-TL431LIACDBZR" H 2700 1550 50  0001 C CNN "MouserPartNo"
	1    2700 1550
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C17
U 1 1 5E55CA76
P 2400 1900
F 0 "C17" H 2515 1946 50  0000 L CNN
F 1 "10u" H 2515 1855 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric" H 2438 1750 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/585/MLCC-1837944.pdf" H 2400 1900 50  0001 C CNN
F 4 "187-CL21A106KPFNNNG" H 2400 1900 50  0001 C CNN "MouserPartNo"
	1    2400 1900
	1    0    0    -1  
$EndComp
Wire Wire Line
	2700 1050 2700 1200
Wire Wire Line
	2700 1200 3150 1200
Connection ~ 2700 1200
Wire Wire Line
	2700 1200 2700 1300
Connection ~ 3400 1200
Wire Wire Line
	3400 1200 3400 850 
$Comp
L power:+3.3VA #PWR039
U 1 1 5E58A8D7
P 2700 700
F 0 "#PWR039" H 2700 550 50  0001 C CNN
F 1 "+3.3VA" H 2715 873 50  0000 C CNN
F 2 "" H 2700 700 50  0001 C CNN
F 3 "" H 2700 700 50  0001 C CNN
	1    2700 700 
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3VA #PWR048
U 1 1 5E58CB8A
P 9150 4500
F 0 "#PWR048" H 9150 4350 50  0001 C CNN
F 1 "+3.3VA" H 9165 4673 50  0000 C CNN
F 2 "" H 9150 4500 50  0001 C CNN
F 3 "" H 9150 4500 50  0001 C CNN
	1    9150 4500
	1    0    0    -1  
$EndComp
Wire Wire Line
	7650 1400 7650 2000
Connection ~ 7650 1400
Wire Wire Line
	8050 1500 8050 2000
Connection ~ 8050 1500
$Comp
L Device:R R25
U 1 1 5E5C0B2B
P 7850 2000
F 0 "R25" V 7643 2000 50  0000 C CNN
F 1 "2M / DNP" V 7734 2000 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 7780 2000 50  0001 C CNN
F 3 "~" H 7850 2000 50  0001 C CNN
	1    7850 2000
	0    1    1    0   
$EndComp
Wire Wire Line
	7650 2000 7700 2000
Wire Wire Line
	8000 2000 8050 2000
Wire Wire Line
	6900 4500 6900 4350
$Comp
L Device:R R23
U 1 1 5E696A10
P 6600 3900
F 0 "R23" V 6393 3900 50  0000 C CNN
F 1 "10" V 6484 3900 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 6530 3900 50  0001 C CNN
F 3 "" H 6600 3900 50  0001 C CNN
	1    6600 3900
	0    -1   -1   0   
$EndComp
Wire Wire Line
	5600 3900 5900 3900
Wire Wire Line
	4350 4000 4650 4000
Connection ~ 6900 3900
Wire Wire Line
	6750 3900 6900 3900
Wire Wire Line
	6900 3900 7550 3900
$Comp
L Device:R R24
U 1 1 5DB0C2DA
P 6900 4050
F 0 "R24" V 6693 4050 50  0000 C CNN
F 1 "DNP" V 6784 4050 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 6830 4050 50  0001 C CNN
F 3 "~" H 6900 4050 50  0001 C CNN
	1    6900 4050
	-1   0    0    1   
$EndComp
Wire Wire Line
	7350 4500 7350 4350
Wire Wire Line
	7350 4350 6900 4350
Connection ~ 6900 4350
Wire Wire Line
	6900 4350 6900 4200
Wire Wire Line
	7350 4800 7350 4900
$Comp
L power:GND #PWR047
U 1 1 5E8423F6
P 7350 4900
F 0 "#PWR047" H 7350 4650 50  0001 C CNN
F 1 "GND" H 7355 4727 50  0000 C CNN
F 2 "" H 7350 4900 50  0001 C CNN
F 3 "" H 7350 4900 50  0001 C CNN
	1    7350 4900
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR049
U 1 1 5E418AE0
P 9150 5800
F 0 "#PWR049" H 9150 5550 50  0001 C CNN
F 1 "GND" H 9155 5627 50  0000 C CNN
F 2 "" H 9150 5800 50  0001 C CNN
F 3 "" H 9150 5800 50  0001 C CNN
	1    9150 5800
	1    0    0    -1  
$EndComp
Wire Wire Line
	9150 5800 9150 5700
$Comp
L shimatta_analog:MCP6V34 U5
U 3 1 5E44D369
P 4750 3700
F 0 "U5" H 4925 3865 50  0000 C CNN
F 1 "MCP6V34" H 4925 3774 50  0000 C CNN
F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 4750 3700 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 4750 3700 50  0001 C CNN
F 4 "579MCP6V34E/ST" H 4750 3700 50  0001 C CNN "MouserPartNo"
	3    4750 3700
	1    0    0    -1  
$EndComp
Wire Wire Line
	5100 1350 5500 1350
$Comp
L shimatta_analog:MCP6V34 U5
U 4 1 5E482137
P 1600 5000
F 0 "U5" H 1775 5165 50  0000 C CNN
F 1 "MCP6V34" H 1775 5074 50  0000 C CNN
F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 1600 5000 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 1600 5000 50  0001 C CNN
F 4 "579MCP6V34E/ST" H 1600 5000 50  0001 C CNN "MouserPartNo"
	4    1600 5000
	1    0    0    1   
$EndComp
$Comp
L shimatta_analog:MCP6V34 U5
U 1 1 5E483253
P 8950 4850
F 0 "U5" H 9125 5015 50  0000 C CNN
F 1 "MCP6V34" H 9125 4924 50  0000 C CNN
F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 8950 4850 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 8950 4850 50  0001 C CNN
F 4 "579MCP6V34E/ST" H 8950 4850 50  0001 C CNN "MouserPartNo"
	1    8950 4850
	1    0    0    -1  
$EndComp
$Comp
L shimatta_analog:MCP6V34 U5
U 2 1 5E483E8E
P 4650 1150
F 0 "U5" H 4825 1315 50  0000 C CNN
F 1 "MCP6V34" H 4825 1224 50  0000 C CNN
F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 4650 1150 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 4650 1150 50  0001 C CNN
F 4 "579MCP6V34E/ST" H 4650 1150 50  0001 C CNN "MouserPartNo"
	2    4650 1150
	1    0    0    -1  
$EndComp
Wire Wire Line
	5200 3900 5250 3900
Wire Wire Line
	2050 3600 2450 3600
$Comp
L Device:R R20
U 1 1 5E6300E3
P 5400 3900
F 0 "R20" V 5193 3900 50  0000 C CNN
F 1 "0" V 5284 3900 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 5330 3900 50  0001 C CNN
F 3 "" H 5400 3900 50  0001 C CNN
	1    5400 3900
	0    -1   -1   0   
$EndComp
Wire Wire Line
	5550 3900 5600 3900
$Comp
L Device:C C24
U 1 1 5E82B184
P 7350 4650
F 0 "C24" V 7602 4650 50  0000 C CNN
F 1 "DNP" V 7511 4650 50  0000 C CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 7388 4500 50  0001 C CNN
F 3 "" H 7350 4650 50  0001 C CNN
	1    7350 4650
	1    0    0    -1  
$EndComp
Text Notes 6000 4700 0    50   ~ 0
This must be shorted\n
$Comp
L Connector:TestPoint TP3
U 1 1 5E42D334
P 6900 3550
F 0 "TP3" H 6958 3668 50  0000 L CNN
F 1 "TEMP_OUT" H 6958 3577 50  0000 L CNN
F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 7100 3550 50  0001 C CNN
F 3 "" H 7100 3550 50  0001 C CNN
	1    6900 3550
	1    0    0    -1  
$EndComp
Wire Wire Line
	6900 3550 6900 3900
Wire Wire Line
	3150 900  3150 1200
Connection ~ 3150 1200
Wire Wire Line
	3150 1200 3400 1200
$Comp
L Connector:TestPoint TP1
U 1 1 5E43ED77
P 3150 900
F 0 "TP1" H 3208 1018 50  0000 L CNN
F 1 "VREF" H 3208 927 50  0000 L CNN
F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 3350 900 50  0001 C CNN
F 3 "" H 3350 900 50  0001 C CNN
	1    3150 900 
	1    0    0    -1  
$EndComp
$Comp
L Connector:TestPoint TP2
U 1 1 5E4680D7
P 5150 2200
F 0 "TP2" H 5092 2226 50  0000 R CNN
F 1 "IBIAS" H 5092 2317 50  0000 R CNN
F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 5350 2200 50  0001 C CNN
F 3 "" H 5350 2200 50  0001 C CNN
	1    5150 2200
	-1   0    0    1   
$EndComp
Wire Wire Line
	5150 2200 5150 1750
Connection ~ 5150 1750
Wire Wire Line
	5150 1750 5500 1750
Text Label 2800 1200 0    50   ~ 0
VREF_OP
$Comp
L Device:C C22
U 1 1 5FB66AC5
P 5900 4200
F 0 "C22" H 5785 4154 50  0000 R CNN
F 1 "1u" H 5785 4245 50  0000 R CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 5938 4050 50  0001 C CNN
F 3 "" H 5900 4200 50  0001 C CNN
F 4 "" H 5900 4200 50  0001 C CNN "MouserPartNo"
	1    5900 4200
	-1   0    0    1   
$EndComp
Wire Wire Line
	5900 4050 5900 3900
Connection ~ 5900 3900
Wire Wire Line
	5900 3900 6450 3900
Wire Wire Line
	5900 4350 5900 4450
Wire Wire Line
	5900 4450 4350 4450
Wire Wire Line
	4350 4450 4350 4350
Wire Wire Line
	4000 3800 4650 3800
$Comp
L Device:RF_Shield_Two_Pieces J6
U 1 1 5FB5A225
P 5050 6800
F 0 "J6" H 5780 6864 50  0000 L CNN
F 1 "Frontend Shielding" H 5780 6773 50  0000 L CNN
F 2 "RF_Shielding:Wuerth_36103255_25x25mm" H 5050 6700 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/445/36103255-1716456.pdf" H 5050 6700 50  0001 C CNN
F 4 "710-36103255" H 5050 6800 50  0001 C CNN "MouserPartNo"
	1    5050 6800
	1    0    0    -1  
$EndComp
Wire Wire Line
	5050 7200 5050 7400
Wire Wire Line
	1450 4250 1450 4200
Wire Wire Line
	1050 4050 1050 3500
Connection ~ 1050 3500
Wire Wire Line
	1050 3500 1500 3500
Wire Wire Line
	1050 4350 1050 4900
Connection ~ 1050 4900
Wire Wire Line
	1050 4900 1500 4900
Wire Wire Line
	2450 3600 2800 3600
Connection ~ 4000 3600
Wire Wire Line
	4000 3600 4000 3400
$Comp
L shimatta_analog:MCP6V34 U5
U 5 1 5E3F0A96
P 1600 3400
F 0 "U5" H 2028 3071 50  0000 L CNN
F 1 "MCP6V34" H 2028 2980 50  0000 L CNN
F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 1600 3400 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 1600 3400 50  0001 C CNN
F 4 "579MCP6V34E/ST" H 1600 3400 50  0001 C CNN "MouserPartNo"
	5    1600 3400
	1    0    0    -1  
$EndComp
Wire Wire Line
	1500 3700 1450 3700
Wire Wire Line
	1450 3700 1450 3850
Wire Wire Line
	1450 4550 1450 4600
Wire Wire Line
	1450 4700 1500 4700
Wire Wire Line
	1450 4600 1550 4600
Wire Wire Line
	1550 4600 1550 4550
Connection ~ 1450 4600
Wire Wire Line
	1450 4600 1450 4700
$Comp
L Device:R R11
U 1 1 5FCA3A4A
P 2450 3850
F 0 "R11" H 2520 3896 50  0000 L CNN
F 1 "1k 0.1%" H 2520 3805 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 2380 3850 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 2450 3850 50  0001 C CNN
F 4 "284-APC0603B1K00N" H 2450 3850 50  0001 C CNN "MouserPartNo"
	1    2450 3850
	1    0    0    -1  
$EndComp
Wire Wire Line
	2450 4000 2400 4000
Wire Wire Line
	1950 4000 1950 3850
Wire Wire Line
	1950 3850 1450 3850
Connection ~ 1450 3850
Wire Wire Line
	1450 3850 1450 3900
$Comp
L Device:R R13
U 1 1 5FCAE3D0
P 2750 4550
F 0 "R13" H 2820 4596 50  0000 L CNN
F 1 "1k 0.1%" H 2820 4505 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 2680 4550 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 2750 4550 50  0001 C CNN
F 4 "284-APC0603B1K00N" H 2750 4550 50  0001 C CNN "MouserPartNo"
	1    2750 4550
	0    -1   -1   0   
$EndComp
Wire Wire Line
	3450 4450 3200 4450
Wire Wire Line
	3200 4450 3200 4550
Wire Wire Line
	3750 4450 4350 4450
Connection ~ 4350 4450
Wire Wire Line
	1550 4550 2500 4550
Wire Wire Line
	2900 4550 3200 4550
Connection ~ 3200 4550
Wire Wire Line
	3200 4550 3200 4700
Wire Wire Line
	2050 4800 3200 4800
Wire Wire Line
	7650 1400 8600 1400
Wire Wire Line
	8050 1500 8600 1500
$Comp
L Device:R R26
U 1 1 5FD14A39
P 8400 1050
F 0 "R26" V 8193 1050 50  0000 C CNN
F 1 "10k" V 8284 1050 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 8330 1050 50  0001 C CNN
F 3 "" H 8400 1050 50  0001 C CNN
	1    8400 1050
	0    1    1    0   
$EndComp
Wire Wire Line
	8250 1050 8200 1050
Wire Wire Line
	8200 1050 8200 1300
Connection ~ 8200 1300
Wire Wire Line
	8200 1300 10000 1300
Wire Wire Line
	8550 1050 8600 1050
Wire Wire Line
	8600 1050 8600 1400
Connection ~ 8600 1400
Wire Wire Line
	8600 1400 10000 1400
$Comp
L Device:R R27
U 1 1 5FD1EB76
P 8400 1850
F 0 "R27" V 8193 1850 50  0000 C CNN
F 1 "10k" V 8284 1850 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 8330 1850 50  0001 C CNN
F 3 "" H 8400 1850 50  0001 C CNN
	1    8400 1850
	0    -1   -1   0   
$EndComp
Wire Wire Line
	8250 1850 8200 1850
Wire Wire Line
	8200 1850 8200 1600
Connection ~ 8200 1600
Wire Wire Line
	8200 1600 10000 1600
Wire Wire Line
	8600 1500 8600 1850
Wire Wire Line
	8600 1850 8550 1850
Connection ~ 8600 1500
Wire Wire Line
	8600 1500 10000 1500
$Comp
L power:GND #PWR?
U 1 1 5FD6FF28
P 1750 6550
AR Path="/5FD6FF28" Ref="#PWR?"  Part="1" 
AR Path="/5D8C5188/5FD6FF28" Ref="#PWR037"  Part="1" 
F 0 "#PWR037" H 1750 6300 50  0001 C CNN
F 1 "GND" H 1755 6377 50  0000 C CNN
F 2 "" H 1750 6550 50  0001 C CNN
F 3 "" H 1750 6550 50  0001 C CNN
	1    1750 6550
	1    0    0    -1  
$EndComp
Wire Wire Line
	2050 5850 2550 5850
Wire Wire Line
	2550 6400 2550 6500
Wire Wire Line
	2550 5850 2550 5750
Connection ~ 2550 5850
$Comp
L power:+3.3VA #PWR?
U 1 1 5FD6FF38
P 2550 5750
AR Path="/5FD6FF38" Ref="#PWR?"  Part="1" 
AR Path="/5D8C5188/5FD6FF38" Ref="#PWR038"  Part="1" 
F 0 "#PWR038" H 2550 5600 50  0001 C CNN
F 1 "+3.3VA" H 2565 5923 50  0000 C CNN
F 2 "" H 2550 5750 50  0001 C CNN
F 3 "" H 2550 5750 50  0001 C CNN
	1    2550 5750
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 5FD6FF3E
P 2550 6250
AR Path="/5FD6FF3E" Ref="C?"  Part="1" 
AR Path="/5D8C5188/5FD6FF3E" Ref="C18"  Part="1" 
F 0 "C18" H 2665 6296 50  0000 L CNN
F 1 "1u" H 2665 6205 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 2588 6100 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/212/KEM_C1002_X7R_SMD-1102033.pdf" H 2550 6250 50  0001 C CNN
F 4 "80-C0603C105K4RLR" H 2550 6250 50  0001 C CNN "MouserPartNo"
	1    2550 6250
	1    0    0    -1  
$EndComp
Wire Wire Line
	2550 5850 2550 6100
$Comp
L Device:Ferrite_Bead_Small FB2
U 1 1 5FD7F1B4
P 1000 5850
F 0 "FB2" V 763 5850 50  0000 C CNN
F 1 "600 Z" V 854 5850 50  0000 C CNN
F 2 "Inductor_SMD:L_0603_1608Metric" V 930 5850 50  0001 C CNN
F 3 "https://www.fair-rite.com/product/chip-beads-2506036017h0/" H 1000 5850 50  0001 C CNN
F 4 "623-2506036017H0" H 1000 5850 50  0001 C CNN "MouserPartNo"
	1    1000 5850
	0    1    1    0   
$EndComp
$Comp
L power:+5V #PWR036
U 1 1 5FD80BCE
P 750 5450
F 0 "#PWR036" H 750 5300 50  0001 C CNN
F 1 "+5V" H 765 5623 50  0000 C CNN
F 2 "" H 750 5450 50  0001 C CNN
F 3 "" H 750 5450 50  0001 C CNN
	1    750  5450
	1    0    0    -1  
$EndComp
Wire Wire Line
	750  5450 750  5850
Wire Wire Line
	750  5850 900  5850
Wire Wire Line
	1100 5850 1150 5850
Wire Wire Line
	1250 5850 1250 6000
Connection ~ 1250 5850
Wire Wire Line
	1250 5850 1350 5850
$Comp
L Device:C C16
U 1 1 5FD8F227
P 1250 6150
F 0 "C16" H 1365 6196 50  0000 L CNN
F 1 "DNP" H 1365 6105 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric" H 1288 6000 50  0001 C CNN
F 3 "" H 1250 6150 50  0001 C CNN
	1    1250 6150
	1    0    0    -1  
$EndComp
Wire Wire Line
	1250 6300 1250 6350
Wire Wire Line
	1250 6350 1750 6350
Connection ~ 1750 6350
Wire Wire Line
	1750 6350 1750 6500
Wire Wire Line
	1150 5850 1150 6000
Wire Wire Line
	1150 6000 1000 6000
Wire Wire Line
	1000 6000 1000 6150
Connection ~ 1150 5850
Wire Wire Line
	1150 5850 1250 5850
$Comp
L Device:C C14
U 1 1 5FD9D886
P 1000 6300
F 0 "C14" H 1115 6346 50  0000 L CNN
F 1 "1u" H 1115 6255 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric" H 1038 6150 50  0001 C CNN
F 3 "https://www.mouser.de/datasheet/2/212/KEM_C1002_X7R_SMD-1102033.pdf" H 1000 6300 50  0001 C CNN
F 4 "80-C0805C105K4R" H 1000 6300 50  0001 C CNN "MouserPartNo"
	1    1000 6300
	1    0    0    -1  
$EndComp
Wire Wire Line
	1000 6450 1000 6500
Wire Wire Line
	1000 6500 1750 6500
Connection ~ 1750 6500
Wire Wire Line
	1750 6500 1750 6550
Wire Wire Line
	2550 6500 1750 6500
Wire Wire Line
	1750 6250 1750 6350
$Comp
L Regulator_Linear:LP5907MFX-3.3 U6
U 1 1 601037AF
P 1750 5950
F 0 "U6" H 1750 6317 50  0000 C CNN
F 1 "LP5907MFX-3.3" H 1750 6226 50  0000 C CNN
F 2 "Package_TO_SOT_SMD:SOT-23-5" H 1750 6300 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lp5907.pdf" H 1750 6450 50  0001 C CNN
F 4 "595-LP5907MFX-3.3NPB" H 1750 5950 50  0001 C CNN "MouserPartNo"
	1    1750 5950
	1    0    0    -1  
$EndComp
Wire Wire Line
	1450 5950 1350 5950
Wire Wire Line
	1350 5950 1350 5850
Connection ~ 1350 5850
Wire Wire Line
	1350 5850 1450 5850
$Comp
L Connector:TestPoint TP4
U 1 1 5FC423D1
P 3450 6700
F 0 "TP4" H 3508 6818 50  0000 L CNN
F 1 "GND" H 3508 6727 50  0000 L CNN
F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 3650 6700 50  0001 C CNN
F 3 "" H 3650 6700 50  0001 C CNN
	1    3450 6700
	1    0    0    -1  
$EndComp
$Comp
L Connector:TestPoint TP5
U 1 1 5FC480E3
P 3950 6700
F 0 "TP5" H 4008 6818 50  0000 L CNN
F 1 "GND" H 4008 6727 50  0000 L CNN
F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 4150 6700 50  0001 C CNN
F 3 "" H 4150 6700 50  0001 C CNN
	1    3950 6700
	1    0    0    -1  
$EndComp
Wire Wire Line
	3450 6700 3450 7050
Wire Wire Line
	3950 6700 3950 7050
$Comp
L power:GND #PWR0118
U 1 1 5FC61F82
P 3950 7050
F 0 "#PWR0118" H 3950 6800 50  0001 C CNN
F 1 "GND" H 3955 6877 50  0000 C CNN
F 2 "" H 3950 7050 50  0001 C CNN
F 3 "" H 3950 7050 50  0001 C CNN
	1    3950 7050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0117
U 1 1 5FC62346
P 3450 7050
F 0 "#PWR0117" H 3450 6800 50  0001 C CNN
F 1 "GND" H 3455 6877 50  0000 C CNN
F 2 "" H 3450 7050 50  0001 C CNN
F 3 "" H 3450 7050 50  0001 C CNN
	1    3450 7050
	1    0    0    -1  
$EndComp
Wire Wire Line
	1450 4200 2200 4200
Connection ~ 1450 4200
$Comp
L power:GND #PWR0122
U 1 1 5FE0BF1F
P 2200 4200
F 0 "#PWR0122" H 2200 3950 50  0001 C CNN
F 1 "GND" H 2205 4027 50  0000 C CNN
F 2 "" H 2200 4200 50  0001 C CNN
F 3 "" H 2200 4200 50  0001 C CNN
	1    2200 4200
	1    0    0    -1  
$EndComp
$Comp
L Device:C C63
U 1 1 5FE2133C
P 2800 3850
F 0 "C63" H 2685 3804 50  0000 R CNN
F 1 "DNP" H 2685 3895 50  0000 R CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 2838 3700 50  0001 C CNN
F 3 "" H 2800 3850 50  0001 C CNN
F 4 "" H 2800 3850 50  0001 C CNN "MouserPartNo"
	1    2800 3850
	-1   0    0    1   
$EndComp
Wire Wire Line
	2800 3700 2800 3600
Connection ~ 2800 3600
Wire Wire Line
	2800 3600 3450 3600
Wire Wire Line
	2800 4000 2800 4050
Wire Wire Line
	2800 4050 2400 4050
Wire Wire Line
	2400 4050 2400 4000
Connection ~ 2400 4000
Wire Wire Line
	2400 4000 1950 4000
$Comp
L Device:C C62
U 1 1 5FE331AE
P 2750 4700
F 0 "C62" H 2635 4654 50  0000 R CNN
F 1 "DNP" H 2635 4745 50  0000 R CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 2788 4550 50  0001 C CNN
F 3 "" H 2750 4700 50  0001 C CNN
F 4 "" H 2750 4700 50  0001 C CNN "MouserPartNo"
	1    2750 4700
	0    -1   -1   0   
$EndComp
Wire Wire Line
	2600 4700 2500 4700
Wire Wire Line
	2500 4700 2500 4550
Connection ~ 2500 4550
Wire Wire Line
	2500 4550 2600 4550
Wire Wire Line
	2900 4700 3200 4700
Connection ~ 3200 4700
Wire Wire Line
	3200 4700 3200 4800
$Comp
L power:GND #PWR0124
U 1 1 6000B71A
P 5050 7400
F 0 "#PWR0124" H 5050 7150 50  0001 C CNN
F 1 "GND" H 5055 7227 50  0000 C CNN
F 2 "" H 5050 7400 50  0001 C CNN
F 3 "" H 5050 7400 50  0001 C CNN
	1    5050 7400
	1    0    0    -1  
$EndComp
Text Notes 4100 6300 0    50   ~ 0
This is optional. Might use this in EM polluted environment
$EndSCHEMATC
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								EESchema Schematic File Version 4
 								EELAYER 30 0
 								EELAYER END
 								$Descr A4 11693 8268
 								encoding utf-8
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Sheet 2 4
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Title "Reflow Oven Controller"
-												Add current date and revision to schematic

											
										
										
											2020-02-18 20:52:50 +01:00
+								Date "2020-02-18"
-												Finalize v1.3.1

											
										
										
											2021-10-23 19:57:56 +02:00
+								Rev "v1.3.1"
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Comp "Shimatta"
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Comment1 ""
 								Comment2 ""
 								Comment3 ""
 								Comment4 ""
 								$EndDescr
 								Text HLabel 10000 1300 2    50   Output ~ 0
 								FORCE+
 								Text HLabel 10000 1600 2    50   Output ~ 0
 								FORCE-
 								Text HLabel 10000 1400 2    50   Input ~ 0
 								SENS+
-												First draft of v1.3 schematic and layout

											
										
										
											2020-11-27 22:22:05 +01:00
+								Text HLabel 10000 1500 2    50   Input ~ 0
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								SENS-
 								Text Label 7150 1300 0    50   ~ 0
 								F+
 								Text Label 7150 1400 0    50   ~ 0
 								S+
 								Text Label 7150 1500 0    50   ~ 0
 								S-
 								Text Label 7150 1600 0    50   ~ 0
 								F-
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1450 4500 1450
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1450 4500 1750
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+1750 5150 1750
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Text Label 6350 1750 2    50   ~ 0
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								F-
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1750 6050 1800
 								Connection ~ 6050 1750
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1750 6350 1750
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R22
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D90BA7B
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 6050 1950
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R22" H 6120 1996 50  0000 L CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "1k 0.1%" H 6120 1905 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 5980 1950 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 6050 1950 50  0001 C CNN
 								F 4 "284-APC0603B1K00N" H 6050 1950 50  0001 C CNN "MouserPartNo"
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+6050 1950
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+0    0    -1
 								$EndComp
 								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L power:GND #PWR045
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D90C0A7
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 6050 2150
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 0 "#PWR045" H 6050 1900 50  0001 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "GND" H 6055 1977 50  0000 C CNN
 								F 2 "" H 6050 2150 50  0001 C CNN
 								F 3 "" H 6050 2150 50  0001 C CNN
 6050 2150
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+2150 6050 2100
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+4750 9150 4600
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+4600 9350 4600
 								Connection ~ 9150 4600
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+4600 9150 4500
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L Device:C C25
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D910C4E
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								P 9500 4600
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 0 "C25" V 9248 4600 50  0000 C CNN
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								F 1 "100n" V 9339 4600 50  0000 C CNN
 								F 2 "Capacitor_SMD:C_0603_1608Metric" H 9538 4450 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/40/AutoMLCC-777028.pdf" H 9500 4600 50  0001 C CNN
 								F 4 "581-06031C104K4T2A" H 9500 4600 50  0001 C CNN "MouserPartNo"
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+9500 4600
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+1    1    0
 								$EndComp
 								Wire Wire Line
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+4600 9800 4600
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+4600 9800 4650
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L power:GND #PWR050
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D912645
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								P 9800 4650
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "#PWR050" H 9800 4400 50  0001 C CNN
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								F 1 "GND" H 9805 4477 50  0000 C CNN
 								F 2 "" H 9800 4650 50  0001 C CNN
 								F 3 "" H 9800 4650 50  0001 C CNN
 9800 4650
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+0    0    -1
 								$EndComp
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Text Label 6350 1350 2    50   ~ 0
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								F+
 								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L Device:C C21
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D918057
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 5500 1550
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 0 "C21" H 5615 1596 50  0000 L CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "22n" H 5615 1505 50  0000 L CNN
 								F 2 "Capacitor_SMD:C_0603_1608Metric" H 5538 1400 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/40/X7RDielectric-777024.pdf" H 5500 1550 50  0001 C CNN
 								F 4 "581-0603ZC223KAT2A" H 5500 1550 50  0001 C CNN "MouserPartNo"
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+5500 1550
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1700 5500 1750
 								Connection ~ 5500 1750
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1750 6050 1750
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1400 5500 1350
 								Connection ~ 5500 1350
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1350 6350 1350
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R12
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D929598
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 2700 900
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R12" H 2770 946 50  0000 L CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "150" H 2770 855 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 2630 900 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 2700 900 50  0001 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+2700 900
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1550 2500 1300
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1300 2700 1300
 								Connection ~ 2700 1300
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1300 2700 1450
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L power:GND #PWR040
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D92E1A1
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 2700 2100
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "#PWR040" H 2700 1850 50  0001 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "GND" H 2705 1927 50  0000 C CNN
 								F 2 "" H 2700 2100 50  0001 C CNN
 								F 3 "" H 2700 2100 50  0001 C CNN
 2700 2100
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1850 3850 1700
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L Device:C C19
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D932D1C
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 3850 1550
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 0 "C19" H 3965 1596 50  0000 L CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "1u" H 3965 1505 50  0000 L CNN
 								F 2 "Capacitor_SMD:C_0603_1608Metric" H 3888 1400 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/212/KEM_C1002_X7R_SMD-1102033.pdf" H 3850 1550 50  0001 C CNN
 								F 4 "80-C0603C105K4RLR" H 3850 1550 50  0001 C CNN "MouserPartNo"
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+3850 1550
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1400 3850 1250
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1250 4150 1250
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R14
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D9371CC
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 3600 1250
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R14" V 3393 1250 50  0000 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "24k 0.1%" V 3484 1250 50  0000 C CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 3530 1250 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/418/4/NG_DS_1773270-2_A-1534319.pdf" H 3600 1250 50  0001 C CNN
 								F 4 "279-RQ73C1J24K9BTDF" H 3600 1250 50  0001 C CNN "MouserPartNo"
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+3600 1250
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+1    1    0
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1250 3850 1250
 								Connection ~ 3850 1250
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+700  2700 750
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1250 4150 1400
 								Connection ~ 4150 1250
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1250 4550 1250
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R19
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D947159
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 4150 1550
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R19" H 4220 1596 50  0000 L CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "1k 0.1%" H 4220 1505 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 4080 1550 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 4150 1550 50  0001 C CNN
 								F 4 "284-APC0603B1K00N" H 4150 1550 50  0001 C CNN "MouserPartNo"
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+4150 1550
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1700 4150 1850
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1850 3850 1850
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1600 8200 1600
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1500 8050 1500
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1400 7650 1400
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1300 8200 1300
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1250 3400 1200
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+850  3550 850
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1250 3450 1250
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R17
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D9B187D
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 3700 850
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R17" V 3493 850 50  0000 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "0" V 3584 850 50  0000 C CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 3630 850 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 3700 850 50  0001 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+3700 850
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+1    1    0
 								$EndComp
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Text Label 4100 850  2    50   ~ 0
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								VREF
 								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L Device:C C20
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D9BF43F
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 4250 850
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 0 "C20" V 3998 850 50  0000 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "1u" V 4089 850 50  0000 C CNN
 								F 2 "Capacitor_SMD:C_0603_1608Metric" H 4288 700 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/212/KEM_C1002_X7R_SMD-1102033.pdf" H 4250 850 50  0001 C CNN
 								F 4 "80-C0603C105K4RLR" H 4250 850 50  0001 C CNN "MouserPartNo"
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+4250 850
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+1    1    0
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+850  4100 850
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L power:GND #PWR043
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								U 1 1 5D9BFEE1
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 4500 900
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "#PWR043" H 4500 650 50  0001 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "GND" H 4505 727 50  0000 C CNN
 								F 2 "" H 4500 900 50  0001 C CNN
 								F 3 "" H 4500 900 50  0001 C CNN
 4500 900
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+900  4500 850
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+850  4400 850
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								Wire Wire Line
 1050 10000 1050
 								Text HLabel 10000 1050 2    50   Output ~ 0
 								VREF
 								Text Label 9150 1050 0    50   ~ 0
 								VREF
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								Text Label 750  3500 0    50   ~ 0
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								S+
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Text HLabel 7550 3900 2    50   Output ~ 0
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								TEMP_OUT
-												Replace custom opamp circuit with INA126 instrumentation amp

											
										
										
											2020-01-02 00:08:09 +01:00
+								Text Notes 5450 750  0    100  ~ 20
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Use low drift types for the marked resistors
 								Wire Notes Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1650 5900 2150
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+2150 6550 2150
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+2150 6550 1650
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1650 5900 1650
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1400 4550 1400
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1400 4550 1750
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1750 4000 1750
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1750 4000 1400
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+950  3400 1350
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1350 3750 1350
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1350 3750 1000
-												Schematic beautify and layout improvments, Length matching for SDIO

											
										
										
											2019-12-25 19:15:32 +01:00
+								Wire Notes Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1000 3400 1000
-												Replace custom opamp circuit with INA126 instrumentation amp

											
										
										
											2020-01-02 00:08:09 +01:00
+								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3500 1050 3500
 								Text Label 7050 3900 0    50   ~ 0
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								TEMP_OUT
 								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L Device:C C23
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								U 1 1 5E2394E4
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 6900 4650
 								F 0 "C23" V 7152 4650 50  0000 C CNN
 								F 1 "Bridge" V 7061 4650 50  0000 C CNN
 								F 2 "Capacitor_SMD:C_0603_1608Metric" H 6938 4500 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 6900 4650 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+6900 4650
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4800 6900 4900
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L power:GND #PWR046
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								U 1 1 5E241AC0
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 6900 4900
 								F 0 "#PWR046" H 6900 4650 50  0001 C CNN
 								F 1 "GND" H 6905 4727 50  0000 C CNN
 								F 2 "" H 6900 4900 50  0001 C CNN
 								F 3 "" H 6900 4900 50  0001 C CNN
 6900 4900
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1650 2700 2050
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L power:GND #PWR041
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								U 1 1 5E102FCD
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								P 3850 2150
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "#PWR041" H 3850 1900 50  0001 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "GND" H 3855 1977 50  0000 C CNN
 								F 2 "" H 3850 2150 50  0001 C CNN
 								F 3 "" H 3850 2150 50  0001 C CNN
 3850 2150
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+2150 3850 1850
 								Connection ~ 3850 1850
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1550 2600 1550
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+2050 2700 2050
 								Connection ~ 2700 2050
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+2050 2700 2100
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1750 2400 1550
-												Small fixes and improvements

* Card detect pin used
* Fix SD card slot
* Improve routing and via placement

											
										
										
											2020-01-03 18:34:21 +01:00
+								Wire Wire Line
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+1550 2500 1550
 								Connection ~ 2500 1550
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L Device:C C15
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								U 1 1 5E232923
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 1050 4200
 								F 0 "C15" H 1165 4246 50  0000 L CNN
 								F 1 "10n" H 1165 4155 50  0000 L CNN
 								F 2 "Capacitor_SMD:C_0603_1608Metric" H 1088 4050 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/40/licc-776614.pdf" H 1050 4200 50  0001 C CNN
 								F 4 "581-03063C103K4T2A" H 1050 4200 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1050 4200
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
 3700 2450 3600
 								Connection ~ 2450 3600
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Text Label 750  4900 0    50   ~ 0
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								S-
 								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4900 1050 4900
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R10
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								U 1 1 5E292BD1
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 1450 4400
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R10" H 1520 4446 50  0000 L CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "1k 0.1%" H 1520 4355 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 1380 4400 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 1450 4400 50  0001 C CNN
 								F 4 "284-APC0603B1K00N" H 1450 4400 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1450 4400
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+0    0    -1
 								$EndComp
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R9
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								U 1 1 5E292BD7
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 1450 4050
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R9" H 1520 4096 50  0000 L CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "1k 0.1%" H 1520 4005 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 1380 4050 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 1450 4050 50  0001 C CNN
 								F 4 "284-APC0603B1K00N" H 1450 4050 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1450 4050
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+0    0    -1
 								$EndComp
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R15
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								U 1 1 5E333B2A
 								P 3600 3600
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R15" H 3670 3646 50  0000 L CNN
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								F 1 "1k 0.1%" H 3670 3555 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 3530 3600 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 3600 3600 50  0001 C CNN
 								F 4 "284-APC0603B1K00N" H 3600 3600 50  0001 C CNN "MouserPartNo"
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+3600 3600
 1    1    0
 								$EndComp
 								Wire Wire Line
 3600 4000 3600
 								Wire Wire Line
 3600 4000 3800
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R18
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								U 1 1 5E352DB6
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 4000 3250
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R18" H 4070 3296 50  0000 L CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "5k 0.1%" H 4070 3205 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 3930 3250 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/447/PYu-RT_1-to-0.01_RoHS_L_11-1669912.pdf" H 4000 3250 50  0001 C CNN
 								F 4 "603-RT0603BRE075KL
" H 4000 3250 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4000 3250
 0    0    -1
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								$EndComp
 								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3100 4000 3050
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L power:GND #PWR042
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								U 1 1 5E35E6EA
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 4000 3050
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "#PWR042" H 4000 2800 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "GND" H 4005 2877 50  0000 C CNN
 								F 2 "" H 4000 3050 50  0001 C CNN
 								F 3 "" H 4000 3050 50  0001 C CNN
 4000 3050
 									-1   0    0    1
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								$EndComp
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R16
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								U 1 1 5E381FD9
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 3600 4450
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R16" H 3350 4500 50  0000 L CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "1k 0.1%" H 3250 4400 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 3530 4450 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 3600 4450 50  0001 C CNN
 								F 4 "284-APC0603B1K00N" H 3600 4450 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3600 4450
 -1   -1   0
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								$EndComp
 								Wire Wire Line
 4350 5600 4350
 								Connection ~ 4350 4350
 								Wire Wire Line
 4350 4350 4000
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R21
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								U 1 1 5E3A5DAA
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+								P 5600 4200
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R21" H 5670 4246 50  0000 L CNN
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+								F 1 "5k 0.1%" H 5670 4155 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 5530 4200 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/447/PYu-RT_1-to-0.01_RoHS_L_11-1669912.pdf" H 5600 4200 50  0001 C CNN
 								F 4 "603-RT0603BRE075KL
" H 5600 4200 50  0001 C CNN "MouserPartNo"
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+5600 4200
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+									-1   0    0    1
 								$EndComp
 								Wire Wire Line
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+4050 5600 3900
-												Remove INA126 because it doesn't work in this configuration. Replace by old subtractor circuit

											
										
										
											2020-01-11 20:22:02 +01:00
+								Connection ~ 5600 3900
-												Improve layout, change color of B.Silk and improve schematic

											
										
										
											2020-01-12 14:56:58 +01:00
+								Wire Notes Line
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+3950 5700 3950
-												Improve layout, change color of B.Silk and improve schematic

											
										
										
											2020-01-12 14:56:58 +01:00
+								Wire Notes Line
 3950 5700 4300
 								Wire Notes Line
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+4300 5200 4300
-												Improve layout, change color of B.Silk and improve schematic

											
										
										
											2020-01-12 14:56:58 +01:00
+								Wire Notes Line
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+4300 5200 3950
-												Improve layout, change color of B.Silk and improve schematic

											
										
										
											2020-01-12 14:56:58 +01:00
+								Wire Notes Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3400 3900 3400
-												Improve layout, change color of B.Silk and improve schematic

											
										
										
											2020-01-12 14:56:58 +01:00
+								Wire Notes Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3100 4450 3100
-												Improve layout, change color of B.Silk and improve schematic

											
										
										
											2020-01-12 14:56:58 +01:00
+								Wire Notes Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4000 3400 4000
-												Improve layout, change color of B.Silk and improve schematic

											
										
										
											2020-01-12 14:56:58 +01:00
+								Wire Notes Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4000 3400 3500
-												Improve layout, change color of B.Silk and improve schematic

											
										
										
											2020-01-12 14:56:58 +01:00
+								Wire Notes Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3500 3800 3500
-												Improve layout, change color of B.Silk and improve schematic

											
										
										
											2020-01-12 14:56:58 +01:00
+								Wire Notes Line
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+3500 3800 4000
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Reference_Voltage:TL431DBZ U7
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								U 1 1 5E5592F3
 								P 2700 1550
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "U7" V 2746 1480 50  0000 R CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "TL431LI-DBZ" V 2655 1480 50  0000 R CNN
 								F 2 "Package_TO_SOT_SMD:SOT-23" H 2700 1400 50  0001 C CIN
 								F 3 "http://www.ti.com/lit/ds/symlink/tl431.pdf" H 2700 1550 50  0001 C CIN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 4 "595-TL431LIACDBZR" H 2700 1550 50  0001 C CNN "MouserPartNo"
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+2700 1550
 -1   -1   0
 								$EndComp
 								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L Device:C C17
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								U 1 1 5E55CA76
 								P 2400 1900
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 0 "C17" H 2515 1946 50  0000 L CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "10u" H 2515 1855 50  0000 L CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 2 "Capacitor_SMD:C_0805_2012Metric" H 2438 1750 50  0001 C CNN
 								F 3 "https://www.mouser.de/datasheet/2/585/MLCC-1837944.pdf" H 2400 1900 50  0001 C CNN
 								F 4 "187-CL21A106KPFNNNG" H 2400 1900 50  0001 C CNN "MouserPartNo"
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+2400 1900
 0    0    -1
 								$EndComp
 								Wire Wire Line
 1050 2700 1200
 								Wire Wire Line
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+1200 3150 1200
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Connection ~ 2700 1200
 								Wire Wire Line
 1200 2700 1300
 								Connection ~ 3400 1200
 								Wire Wire Line
 1200 3400 850
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L power:+3.3VA #PWR039
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								U 1 1 5E58A8D7
 								P 2700 700
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "#PWR039" H 2700 550 50  0001 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 1 "+3.3VA" H 2715 873 50  0000 C CNN
 								F 2 "" H 2700 700 50  0001 C CNN
 								F 3 "" H 2700 700 50  0001 C CNN
 2700 700
 0    0    -1
 								$EndComp
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L power:+3.3VA #PWR048
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								U 1 1 5E58CB8A
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								P 9150 4500
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "#PWR048" H 9150 4350 50  0001 C CNN
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								F 1 "+3.3VA" H 9165 4673 50  0000 C CNN
 								F 2 "" H 9150 4500 50  0001 C CNN
 								F 3 "" H 9150 4500 50  0001 C CNN
 9150 4500
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
 1400 7650 2000
 								Connection ~ 7650 1400
 								Wire Wire Line
 1500 8050 2000
 								Connection ~ 8050 1500
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R25
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								U 1 1 5E5C0B2B
 								P 7850 2000
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R25" V 7643 2000 50  0000 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "2M / DNP" V 7734 2000 50  0000 C CNN
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								F 2 "Resistor_SMD:R_0603_1608Metric" V 7780 2000 50  0001 C CNN
 								F 3 "~" H 7850 2000 50  0001 C CNN
 7850 2000
 1    1    0
 								$EndComp
 								Wire Wire Line
 2000 7700 2000
 								Wire Wire Line
 2000 8050 2000
 								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4500 6900 4350
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R23
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								U 1 1 5E696A10
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 6600 3900
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R23" V 6393 3900 50  0000 C CNN
-												Add 3d model for inductor and use 22uF caps instead of 10uF. This enahnces performance drastically

											
										
										
											2021-01-05 18:46:03 +01:00
+								F 1 "10" V 6484 3900 50  0000 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 2 "Resistor_SMD:R_0603_1608Metric" V 6530 3900 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 6600 3900 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+6600 3900
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+-1   -1   0
 								$EndComp
 								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3900 5900 3900
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Wire Wire Line
 4000 4650 4000
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Connection ~ 6900 3900
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3900 6900 3900
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3900 7550 3900
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R24
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								U 1 1 5DB0C2DA
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 6900 4050
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R24" V 6693 4050 50  0000 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 1 "DNP" V 6784 4050 50  0000 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 2 "Resistor_SMD:R_0603_1608Metric" V 6830 4050 50  0001 C CNN
 								F 3 "~" H 6900 4050 50  0001 C CNN
 6900 4050
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+									-1   0    0    1
 								$EndComp
 								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4500 7350 4350
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4350 6900 4350
 								Connection ~ 6900 4350
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4350 6900 4200
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+4800 7350 4900
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L power:GND #PWR047
-												Prepare for v1.2

* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.

											
										
										
											2020-02-05 18:30:34 +01:00
+								U 1 1 5E8423F6
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 7350 4900
 								F 0 "#PWR047" H 7350 4650 50  0001 C CNN
 								F 1 "GND" H 7355 4727 50  0000 C CNN
 								F 2 "" H 7350 4900 50  0001 C CNN
 								F 3 "" H 7350 4900 50  0001 C CNN
 7350 4900
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+0    0    -1
 								$EndComp
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L power:GND #PWR049
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								U 1 1 5E418AE0
 								P 9150 5800
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "#PWR049" H 9150 5550 50  0001 C CNN
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								F 1 "GND" H 9155 5627 50  0000 C CNN
 								F 2 "" H 9150 5800 50  0001 C CNN
 								F 3 "" H 9150 5800 50  0001 C CNN
 9150 5800
 0    0    -1
 								$EndComp
 								Wire Wire Line
 5800 9150 5700
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L shimatta_analog:MCP6V34 U5
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								U 3 1 5E44D369
 								P 4750 3700
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "U5" H 4925 3865 50  0000 C CNN
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								F 1 "MCP6V34" H 4925 3774 50  0000 C CNN
 								F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 4750 3700 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 4750 3700 50  0001 C CNN
 								F 4 "579MCP6V34E/ST" H 4750 3700 50  0001 C CNN "MouserPartNo"
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+4750 3700
 0    0    -1
 								$EndComp
 								Wire Wire Line
 1350 5500 1350
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L shimatta_analog:MCP6V34 U5
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								U 4 1 5E482137
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 1600 5000
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "U5" H 1775 5165 50  0000 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "MCP6V34" H 1775 5074 50  0000 C CNN
 								F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 1600 5000 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 1600 5000 50  0001 C CNN
 								F 4 "579MCP6V34E/ST" H 1600 5000 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1600 5000
 0    0    1
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								$EndComp
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L shimatta_analog:MCP6V34 U5
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								U 1 1 5E483253
 								P 8950 4850
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "U5" H 9125 5015 50  0000 C CNN
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								F 1 "MCP6V34" H 9125 4924 50  0000 C CNN
 								F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 8950 4850 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 8950 4850 50  0001 C CNN
 								F 4 "579MCP6V34E/ST" H 8950 4850 50  0001 C CNN "MouserPartNo"
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+8950 4850
 0    0    -1
 								$EndComp
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L shimatta_analog:MCP6V34 U5
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								U 2 1 5E483E8E
 								P 4650 1150
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "U5" H 4825 1315 50  0000 C CNN
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								F 1 "MCP6V34" H 4825 1224 50  0000 C CNN
 								F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 4650 1150 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 4650 1150 50  0001 C CNN
 								F 4 "579MCP6V34E/ST" H 4650 1150 50  0001 C CNN "MouserPartNo"
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+4650 1150
 0    0    -1
 								$EndComp
 								Wire Wire Line
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+3900 5250 3900
-												Replace all MCP6V31U with MCP6V34. It's cheaper.

											
										
										
											2020-02-06 19:49:54 +01:00
+								Wire Wire Line
 3600 2450 3600
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R20
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+								U 1 1 5E6300E3
 								P 5400 3900
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R20" V 5193 3900 50  0000 C CNN
-												Add 3d model for inductor and use 22uF caps instead of 10uF. This enahnces performance drastically

											
										
										
											2021-01-05 18:46:03 +01:00
+								F 1 "0" V 5284 3900 50  0000 C CNN
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+								F 2 "Resistor_SMD:R_0603_1608Metric" V 5330 3900 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 5400 3900 50  0001 C CNN
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+5400 3900
 -1   -1   0
 								$EndComp
 								Wire Wire Line
 3900 5600 3900
 								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L Device:C C24
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+								U 1 1 5E82B184
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 7350 4650
 								F 0 "C24" V 7602 4650 50  0000 C CNN
 								F 1 "DNP" V 7511 4650 50  0000 C CNN
 								F 2 "Capacitor_SMD:C_0603_1608Metric" H 7388 4500 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 7350 4650 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+7350 4650
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+0    0    -1
 								$EndComp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Text Notes 6000 4700 0    50   ~ 0
-												Rework stability compensation of opamp

											
										
										
											2020-02-06 21:36:27 +01:00
+								This must be shorted\n
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Connector:TestPoint TP3
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+								U 1 1 5E42D334
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								P 6900 3550
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "TP3" H 6958 3668 50  0000 L CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "TEMP_OUT" H 6958 3577 50  0000 L CNN
 								F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 7100 3550 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 7100 3550 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+6900 3550
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+0    0    -1
 								$EndComp
 								Wire Wire Line
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+3550 6900 3900
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+								Wire Wire Line
 900  3150 1200
 								Connection ~ 3150 1200
 								Wire Wire Line
 1200 3400 1200
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Connector:TestPoint TP1
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+								U 1 1 5E43ED77
 								P 3150 900
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "TP1" H 3208 1018 50  0000 L CNN
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+								F 1 "VREF" H 3208 927 50  0000 L CNN
 								F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 3350 900 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 3350 900 50  0001 C CNN
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+3150 900
 0    0    -1
 								$EndComp
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Connector:TestPoint TP2
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+								U 1 1 5E4680D7
 								P 5150 2200
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "TP2" H 5092 2226 50  0000 R CNN
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+								F 1 "IBIAS" H 5092 2317 50  0000 R CNN
 								F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 5350 2200 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 5350 2200 50  0001 C CNN
-												Improve schematic and corresponding layout

											
										
										
											2020-02-16 00:10:01 +01:00
+5150 2200
 									-1   0    0    1
 								$EndComp
 								Wire Wire Line
 2200 5150 1750
 								Connection ~ 5150 1750
 								Wire Wire Line
 1750 5500 1750
 								Text Label 2800 1200 0    50   ~ 0
 								VREF_OP
-												add GND points near test points to get good ground connection

											
										
										
											2020-02-18 20:37:26 +01:00
+								$Comp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								L Device:C C22
 								U 1 1 5FB66AC5
 								P 5900 4200
 								F 0 "C22" H 5785 4154 50  0000 R CNN
-												Improve frontend and improved layout

											
										
										
											2020-12-12 23:15:10 +01:00
+								F 1 "1u" H 5785 4245 50  0000 R CNN
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+								F 2 "Capacitor_SMD:C_0603_1608Metric" H 5938 4050 50  0001 C CNN
-												Improve frontend and improved layout

											
										
										
											2020-12-12 23:15:10 +01:00
+								F 3 "" H 5900 4200 50  0001 C CNN
 								F 4 "" H 5900 4200 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+5900 4200
 									-1   0    0    1
 								$EndComp
 								Wire Wire Line
 4050 5900 3900
 								Connection ~ 5900 3900
 								Wire Wire Line
 3900 6450 3900
 								Wire Wire Line
 4350 5900 4450
 								Wire Wire Line
 4450 4350 4450
 								Wire Wire Line
 4450 4350 4350
 								Wire Wire Line
 3800 4650 3800
 								$Comp
 								L Device:RF_Shield_Two_Pieces J6
 								U 1 1 5FB5A225
 								P 5050 6800
 								F 0 "J6" H 5780 6864 50  0000 L CNN
 								F 1 "Frontend Shielding" H 5780 6773 50  0000 L CNN
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+								F 2 "RF_Shielding:Wuerth_36103255_25x25mm" H 5050 6700 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/445/36103255-1716456.pdf" H 5050 6700 50  0001 C CNN
 								F 4 "710-36103255" H 5050 6800 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+5050 6800
-												add GND points near test points to get good ground connection

											
										
										
											2020-02-18 20:37:26 +01:00
+0    0    -1
 								$EndComp
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Wire Wire Line
 7200 5050 7400
 								Wire Wire Line
 4250 1450 4200
 								Wire Wire Line
 4050 1050 3500
 								Connection ~ 1050 3500
 								Wire Wire Line
 3500 1500 3500
 								Wire Wire Line
 4350 1050 4900
 								Connection ~ 1050 4900
 								Wire Wire Line
 4900 1500 4900
 								Wire Wire Line
-												Improve frontend and improved layout

											
										
										
											2020-12-12 23:15:10 +01:00
+3600 2800 3600
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Connection ~ 4000 3600
 								Wire Wire Line
 3600 4000 3400
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L shimatta_analog:MCP6V34 U5
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								U 5 1 5E3F0A96
 								P 1600 3400
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "U5" H 2028 3071 50  0000 L CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "MCP6V34" H 2028 2980 50  0000 L CNN
 								F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 1600 3400 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/268/20005127B-1099366.pdf" H 1600 3400 50  0001 C CNN
 								F 4 "579MCP6V34E/ST" H 1600 3400 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1600 3400
 0    0    -1
 								$EndComp
 								Wire Wire Line
 3700 1450 3700
 								Wire Wire Line
 3700 1450 3850
 								Wire Wire Line
 4550 1450 4600
 								Wire Wire Line
 4700 1500 4700
 								Wire Wire Line
 4600 1550 4600
 								Wire Wire Line
 4600 1550 4550
 								Connection ~ 1450 4600
 								Wire Wire Line
 4600 1450 4700
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R11
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								U 1 1 5FCA3A4A
 								P 2450 3850
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R11" H 2520 3896 50  0000 L CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "1k 0.1%" H 2520 3805 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 2380 3850 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 2450 3850 50  0001 C CNN
 								F 4 "284-APC0603B1K00N" H 2450 3850 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+2450 3850
 0    0    -1
 								$EndComp
 								Wire Wire Line
-												Improve frontend and improved layout

											
										
										
											2020-12-12 23:15:10 +01:00
+4000 2400 4000
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Wire Wire Line
 4000 1950 3850
 								Wire Wire Line
 3850 1450 3850
 								Connection ~ 1450 3850
 								Wire Wire Line
 3850 1450 3900
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R13
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								U 1 1 5FCAE3D0
 								P 2750 4550
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R13" H 2820 4596 50  0000 L CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "1k 0.1%" H 2820 4505 50  0000 L CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 2680 4550 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/303/APC-1-15.34-911303.pdf" H 2750 4550 50  0001 C CNN
 								F 4 "284-APC0603B1K00N" H 2750 4550 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+2750 4550
 -1   -1   0
 								$EndComp
 								Wire Wire Line
 4450 3200 4450
 								Wire Wire Line
 4450 3200 4550
 								Wire Wire Line
 4450 4350 4450
 								Connection ~ 4350 4450
 								Wire Wire Line
-												Improve frontend and improved layout

											
										
										
											2020-12-12 23:15:10 +01:00
+4550 2500 4550
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Wire Wire Line
 4550 3200 4550
 								Connection ~ 3200 4550
 								Wire Wire Line
-												Improve frontend and improved layout

											
										
										
											2020-12-12 23:15:10 +01:00
+4550 3200 4700
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								Wire Wire Line
 4800 3200 4800
 								Wire Wire Line
 1400 8600 1400
 								Wire Wire Line
 1500 8600 1500
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R26
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								U 1 1 5FD14A39
 								P 8400 1050
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R26" V 8193 1050 50  0000 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "10k" V 8284 1050 50  0000 C CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 8330 1050 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 8400 1050 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+8400 1050
 1    1    0
 								$EndComp
 								Wire Wire Line
 1050 8200 1050
 								Wire Wire Line
 1050 8200 1300
 								Connection ~ 8200 1300
 								Wire Wire Line
 1300 10000 1300
 								Wire Wire Line
 1050 8600 1050
 								Wire Wire Line
 1050 8600 1400
 								Connection ~ 8600 1400
 								Wire Wire Line
 1400 10000 1400
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Device:R R27
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								U 1 1 5FD1EB76
 								P 8400 1850
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "R27" V 8193 1850 50  0000 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "10k" V 8284 1850 50  0000 C CNN
 								F 2 "Resistor_SMD:R_0603_1608Metric" V 8330 1850 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 8400 1850 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+8400 1850
 -1   -1   0
 								$EndComp
 								Wire Wire Line
 1850 8200 1850
 								Wire Wire Line
 1850 8200 1600
 								Connection ~ 8200 1600
 								Wire Wire Line
 1600 10000 1600
 								Wire Wire Line
 1500 8600 1850
 								Wire Wire Line
 1850 8550 1850
 								Connection ~ 8600 1500
 								Wire Wire Line
 1500 10000 1500
 								$Comp
 								L power:GND #PWR?
 								U 1 1 5FD6FF28
 								P 1750 6550
 								AR Path="/5FD6FF28" Ref="#PWR?"  Part="1"
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								AR Path="/5D8C5188/5FD6FF28" Ref="#PWR037"  Part="1"
 								F 0 "#PWR037" H 1750 6300 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "GND" H 1755 6377 50  0000 C CNN
 								F 2 "" H 1750 6550 50  0001 C CNN
 								F 3 "" H 1750 6550 50  0001 C CNN
 1750 6550
 0    0    -1
 								$EndComp
 								Wire Wire Line
 5850 2550 5850
 								Wire Wire Line
 6400 2550 6500
 								Wire Wire Line
 5850 2550 5750
 								Connection ~ 2550 5850
 								$Comp
 								L power:+3.3VA #PWR?
 								U 1 1 5FD6FF38
 								P 2550 5750
 								AR Path="/5FD6FF38" Ref="#PWR?"  Part="1"
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								AR Path="/5D8C5188/5FD6FF38" Ref="#PWR038"  Part="1"
 								F 0 "#PWR038" H 2550 5600 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "+3.3VA" H 2565 5923 50  0000 C CNN
 								F 2 "" H 2550 5750 50  0001 C CNN
 								F 3 "" H 2550 5750 50  0001 C CNN
 2550 5750
 0    0    -1
 								$EndComp
 								$Comp
 								L Device:C C?
 								U 1 1 5FD6FF3E
 								P 2550 6250
 								AR Path="/5FD6FF3E" Ref="C?"  Part="1"
 								AR Path="/5D8C5188/5FD6FF3E" Ref="C18"  Part="1"
 								F 0 "C18" H 2665 6296 50  0000 L CNN
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+								F 1 "1u" H 2665 6205 50  0000 L CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 2 "Capacitor_SMD:C_0603_1608Metric" H 2588 6100 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/212/KEM_C1002_X7R_SMD-1102033.pdf" H 2550 6250 50  0001 C CNN
 								F 4 "80-C0603C105K4RLR" H 2550 6250 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+2550 6250
 0    0    -1
 								$EndComp
 								Wire Wire Line
 5850 2550 6100
 								$Comp
 								L Device:Ferrite_Bead_Small FB2
 								U 1 1 5FD7F1B4
 								P 1000 5850
 								F 0 "FB2" V 763 5850 50  0000 C CNN
 								F 1 "600 Z" V 854 5850 50  0000 C CNN
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+								F 2 "Inductor_SMD:L_0603_1608Metric" V 930 5850 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.fair-rite.com/product/chip-beads-2506036017h0/" H 1000 5850 50  0001 C CNN
 								F 4 "623-2506036017H0" H 1000 5850 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1000 5850
 1    1    0
 								$EndComp
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L power:+5V #PWR036
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								U 1 1 5FD80BCE
 								P 750 5450
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "#PWR036" H 750 5300 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								F 1 "+5V" H 765 5623 50  0000 C CNN
 								F 2 "" H 750 5450 50  0001 C CNN
 								F 3 "" H 750 5450 50  0001 C CNN
 750  5450
 0    0    -1
 								$EndComp
 								Wire Wire Line
 5450 750  5850
 								Wire Wire Line
 5850 900  5850
 								Wire Wire Line
 5850 1150 5850
 								Wire Wire Line
 5850 1250 6000
 								Connection ~ 1250 5850
 								Wire Wire Line
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+5850 1350 5850
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+								$Comp
 								L Device:C C16
 								U 1 1 5FD8F227
 								P 1250 6150
 								F 0 "C16" H 1365 6196 50  0000 L CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 1 "DNP" H 1365 6105 50  0000 L CNN
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+								F 2 "Capacitor_SMD:C_0805_2012Metric" H 1288 6000 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "" H 1250 6150 50  0001 C CNN
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1250 6150
 0    0    -1
 								$EndComp
 								Wire Wire Line
 6300 1250 6350
 								Wire Wire Line
 6350 1750 6350
 								Connection ~ 1750 6350
 								Wire Wire Line
 6350 1750 6500
 								Wire Wire Line
 5850 1150 6000
 								Wire Wire Line
 6000 1000 6000
 								Wire Wire Line
 6000 1000 6150
 								Connection ~ 1150 5850
 								Wire Wire Line
 5850 1250 5850
 								$Comp
 								L Device:C C14
 								U 1 1 5FD9D886
 								P 1000 6300
 								F 0 "C14" H 1115 6346 50  0000 L CNN
 								F 1 "1u" H 1115 6255 50  0000 L CNN
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+								F 2 "Capacitor_SMD:C_0805_2012Metric" H 1038 6150 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 3 "https://www.mouser.de/datasheet/2/212/KEM_C1002_X7R_SMD-1102033.pdf" H 1000 6300 50  0001 C CNN
 								F 4 "80-C0805C105K4R" H 1000 6300 50  0001 C CNN "MouserPartNo"
-												Change schematic for v1.3

* Use DCDC buck converter for digital 3V3 supply.
* Add shielding for OPAmp section
* Change frontend amplifier to an instrumentation amplifier design

											
										
										
											2020-11-17 18:59:20 +01:00
+1000 6300
 0    0    -1
 								$EndComp
 								Wire Wire Line
 6450 1000 6500
 								Wire Wire Line
 6500 1750 6500
 								Connection ~ 1750 6500
 								Wire Wire Line
 6500 1750 6550
 								Wire Wire Line
 6500 1750 6500
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+								Wire Wire Line
 6250 1750 6350
 								$Comp
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								L Regulator_Linear:LP5907MFX-3.3 U6
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+								U 1 1 601037AF
 								P 1750 5950
-												Reannotate components

											
										
										
											2020-11-27 22:26:34 +01:00
+								F 0 "U6" H 1750 6317 50  0000 C CNN
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+								F 1 "LP5907MFX-3.3" H 1750 6226 50  0000 C CNN
 								F 2 "Package_TO_SOT_SMD:SOT-23-5" H 1750 6300 50  0001 C CNN
 								F 3 "http://www.ti.com/lit/ds/symlink/lp5907.pdf" H 1750 6450 50  0001 C CNN
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								F 4 "595-LP5907MFX-3.3NPB" H 1750 5950 50  0001 C CNN "MouserPartNo"
-												Schematic finished for v1.3

											
										
										
											2020-11-23 18:05:27 +01:00
+1750 5950
 0    0    -1
 								$EndComp
 								Wire Wire Line
 5950 1350 5950
 								Wire Wire Line
 5950 1350 5850
 								Connection ~ 1350 5850
 								Wire Wire Line
 5850 1450 5850
-												v1.3 finished preliminary layout

											
										
										
											2020-12-05 18:58:28 +01:00
+								$Comp
 								L Connector:TestPoint TP4
 								U 1 1 5FC423D1
 								P 3450 6700
 								F 0 "TP4" H 3508 6818 50  0000 L CNN
 								F 1 "GND" H 3508 6727 50  0000 L CNN
 								F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 3650 6700 50  0001 C CNN
 								F 3 "" H 3650 6700 50  0001 C CNN
 3450 6700
 0    0    -1
 								$EndComp
 								$Comp
 								L Connector:TestPoint TP5
 								U 1 1 5FC480E3
 								P 3950 6700
 								F 0 "TP5" H 4008 6818 50  0000 L CNN
 								F 1 "GND" H 4008 6727 50  0000 L CNN
 								F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 4150 6700 50  0001 C CNN
 								F 3 "" H 4150 6700 50  0001 C CNN
 3950 6700
 0    0    -1
 								$EndComp
 								Wire Wire Line
 6700 3450 7050
 								Wire Wire Line
 6700 3950 7050
 								$Comp
 								L power:GND #PWR0118
 								U 1 1 5FC61F82
 								P 3950 7050
 								F 0 "#PWR0118" H 3950 6800 50  0001 C CNN
 								F 1 "GND" H 3955 6877 50  0000 C CNN
 								F 2 "" H 3950 7050 50  0001 C CNN
 								F 3 "" H 3950 7050 50  0001 C CNN
 3950 7050
 0    0    -1
 								$EndComp
 								$Comp
 								L power:GND #PWR0117
 								U 1 1 5FC62346
 								P 3450 7050
 								F 0 "#PWR0117" H 3450 6800 50  0001 C CNN
 								F 1 "GND" H 3455 6877 50  0000 C CNN
 								F 2 "" H 3450 7050 50  0001 C CNN
 								F 3 "" H 3450 7050 50  0001 C CNN
 3450 7050
 0    0    -1
 								$EndComp
-												Improve frontend and improved layout

											
										
										
											2020-12-12 23:15:10 +01:00
+								Wire Wire Line
 4200 2200 4200
 								Connection ~ 1450 4200
 								$Comp
 								L power:GND #PWR0122
 								U 1 1 5FE0BF1F
 								P 2200 4200
 								F 0 "#PWR0122" H 2200 3950 50  0001 C CNN
 								F 1 "GND" H 2205 4027 50  0000 C CNN
 								F 2 "" H 2200 4200 50  0001 C CNN
 								F 3 "" H 2200 4200 50  0001 C CNN
 2200 4200
 0    0    -1
 								$EndComp
 								$Comp
 								L Device:C C63
 								U 1 1 5FE2133C
 								P 2800 3850
 								F 0 "C63" H 2685 3804 50  0000 R CNN
 								F 1 "DNP" H 2685 3895 50  0000 R CNN
 								F 2 "Capacitor_SMD:C_0603_1608Metric" H 2838 3700 50  0001 C CNN
 								F 3 "" H 2800 3850 50  0001 C CNN
 								F 4 "" H 2800 3850 50  0001 C CNN "MouserPartNo"
 2800 3850
 									-1   0    0    1
 								$EndComp
 								Wire Wire Line
 3700 2800 3600
 								Connection ~ 2800 3600
 								Wire Wire Line
 3600 3450 3600
 								Wire Wire Line
 4000 2800 4050
 								Wire Wire Line
 4050 2400 4050
 								Wire Wire Line
 4050 2400 4000
 								Connection ~ 2400 4000
 								Wire Wire Line
 4000 1950 4000
 								$Comp
 								L Device:C C62
 								U 1 1 5FE331AE
 								P 2750 4700
 								F 0 "C62" H 2635 4654 50  0000 R CNN
 								F 1 "DNP" H 2635 4745 50  0000 R CNN
 								F 2 "Capacitor_SMD:C_0603_1608Metric" H 2788 4550 50  0001 C CNN
 								F 3 "" H 2750 4700 50  0001 C CNN
 								F 4 "" H 2750 4700 50  0001 C CNN "MouserPartNo"
 2750 4700
 -1   -1   0
 								$EndComp
 								Wire Wire Line
 4700 2500 4700
 								Wire Wire Line
 4700 2500 4550
 								Connection ~ 2500 4550
 								Wire Wire Line
 4550 2600 4550
 								Wire Wire Line
 4700 3200 4700
 								Connection ~ 3200 4700
 								Wire Wire Line
 4700 3200 4800
-												Merge Earth and GND nets

											
										
										
											2021-01-07 00:02:41 +01:00
+								$Comp
 								L power:GND #PWR0124
 								U 1 1 6000B71A
 								P 5050 7400
 								F 0 "#PWR0124" H 5050 7150 50  0001 C CNN
 								F 1 "GND" H 5055 7227 50  0000 C CNN
 								F 2 "" H 5050 7400 50  0001 C CNN
 								F 3 "" H 5050 7400 50  0001 C CNN
 5050 7400
 0    0    -1
 								$EndComp
 								Text Notes 4100 6300 0    50   ~ 0
 								This is optional. Might use this in EM polluted environment
-												Fisrt draft. Will be reworked

											
										
										
											2019-09-22 18:42:43 +02:00
+								$EndSCHEMATC