EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 3 3
Title "Reflow Oven Controller"
Date "2019-09-02"
Rev "v1.0"
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   Output ~ 0
SENS-
Wire Wire Line
	10000 1500 9550 1500
Wire Wire Line
	10000 1400 9050 1400
Connection ~ 9050 1400
Connection ~ 9550 1500
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 R316
U 1 1 5D90BA7B
P 6050 1950
F 0 "R316" 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 "~" H 6050 1950 50  0001 C CNN
	1    6050 1950
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0322
U 1 1 5D90C0A7
P 6050 2150
F 0 "#PWR0322" 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 C309
U 1 1 5D910C4E
P 9500 4600
F 0 "C309" 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 "~" H 9500 4600 50  0001 C CNN
	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 #PWR0320
U 1 1 5D912645
P 9800 4650
F 0 "#PWR0320" 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 C311
U 1 1 5D918057
P 5500 1550
F 0 "C311" 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 "~" H 5500 1550 50  0001 C CNN
	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 R303
U 1 1 5D929598
P 2700 900
F 0 "R303" 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 #PWR0310
U 1 1 5D92E1A1
P 2700 2100
F 0 "#PWR0310" 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 C306
U 1 1 5D932D1C
P 3850 1550
F 0 "C306" 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 "~" H 3850 1550 50  0001 C CNN
	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 R306
U 1 1 5D9371CC
P 3600 1250
F 0 "R306" 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 "~" H 3600 1250 50  0001 C CNN
	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 R310
U 1 1 5D947159
P 4150 1550
F 0 "R310" 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 "~" H 4150 1550 50  0001 C CNN
	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 10000 1600
Wire Wire Line
	7150 1500 8050 1500
Wire Wire Line
	7150 1400 7650 1400
Wire Wire Line
	7150 1300 10000 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 R308
U 1 1 5D9B187D
P 3700 850
F 0 "R308" 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 C307
U 1 1 5D9BF43F
P 4250 850
F 0 "C307" 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 "~" H 4250 850 50  0001 C CNN
	1    4250 850 
	0    1    1    0   
$EndComp
Wire Wire Line
	3850 850  4100 850 
$Comp
L power:GND #PWR0313
U 1 1 5D9BFEE1
P 4500 900
F 0 "#PWR0313" 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 6900 3900 2    50   Output ~ 0
TEMP_OUT
$Comp
L Device:C C316
U 1 1 5D8F201B
P 10350 2750
F 0 "C316" H 10465 2796 50  0000 L CNN
F 1 "DNP" H 10465 2705 50  0000 L CNN
F 2 "Capacitor_SMD:C_1210_3225Metric" H 10388 2600 50  0001 C CNN
F 3 "~" H 10350 2750 50  0001 C CNN
	1    10350 2750
	1    0    0    -1  
$EndComp
Wire Wire Line
	10350 2600 10350 2500
Wire Wire Line
	10350 2900 10350 3000
$Comp
L power:GND #PWR0326
U 1 1 5D903DD6
P 10350 3000
F 0 "#PWR0326" H 10350 2750 50  0001 C CNN
F 1 "GND" H 10355 2827 50  0000 C CNN
F 2 "" H 10350 3000 50  0001 C CNN
F 3 "" H 10350 3000 50  0001 C CNN
	1    10350 3000
	1    0    0    -1  
$EndComp
$Comp
L Sensor_Temperature:DS18B20 U306
U 1 1 5E08DC55
P 5350 6850
F 0 "U306" H 5120 6896 50  0000 R CNN
F 1 "DS18B20" H 5120 6805 50  0000 R CNN
F 2 "Package_TO_SOT_THT:TO-92_Inline" H 4350 6600 50  0001 C CNN
F 3 "http://datasheets.maximintegrated.com/en/ds/DS18B20.pdf" H 5200 7100 50  0001 C CNN
	1    5350 6850
	-1   0    0    -1  
$EndComp
$Comp
L Device:C C312
U 1 1 5E096137
P 6050 6850
F 0 "C312" V 5798 6850 50  0000 C CNN
F 1 "100n" V 5889 6850 50  0000 C CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 6088 6700 50  0001 C CNN
F 3 "~" H 6050 6850 50  0001 C CNN
	1    6050 6850
	-1   0    0    1   
$EndComp
Wire Wire Line
	6050 7000 6050 7250
Wire Wire Line
	6050 7250 5350 7250
Wire Wire Line
	5350 7250 5350 7150
Wire Wire Line
	5350 7250 5350 7350
Connection ~ 5350 7250
Wire Wire Line
	6050 6700 6050 6400
Wire Wire Line
	6050 6400 5350 6400
Wire Wire Line
	5350 6400 5350 6550
Wire Wire Line
	5350 6400 5350 6300
Connection ~ 5350 6400
$Comp
L power:+3V3 #PWR0318
U 1 1 5E0AC49E
P 5350 6200
F 0 "#PWR0318" H 5350 6050 50  0001 C CNN
F 1 "+3V3" H 5365 6373 50  0000 C CNN
F 2 "" H 5350 6200 50  0001 C CNN
F 3 "" H 5350 6200 50  0001 C CNN
	1    5350 6200
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0319
U 1 1 5E0AE6F5
P 5350 7350
F 0 "#PWR0319" H 5350 7100 50  0001 C CNN
F 1 "GND" H 5355 7177 50  0000 C CNN
F 2 "" H 5350 7350 50  0001 C CNN
F 3 "" H 5350 7350 50  0001 C CNN
	1    5350 7350
	1    0    0    -1  
$EndComp
Wire Wire Line
	5050 6850 4700 6850
$Comp
L Device:R R313
U 1 1 5E0B45CD
P 4700 6600
F 0 "R313" H 4770 6646 50  0000 L CNN
F 1 "4k7" H 4770 6555 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 4630 6600 50  0001 C CNN
F 3 "~" H 4700 6600 50  0001 C CNN
	1    4700 6600
	1    0    0    -1  
$EndComp
Wire Wire Line
	4700 6750 4700 6850
Connection ~ 4700 6850
Wire Wire Line
	4700 6850 4600 6850
Wire Wire Line
	4700 6450 4700 6300
Wire Wire Line
	4700 6300 5350 6300
Connection ~ 5350 6300
Wire Wire Line
	5350 6300 5350 6200
Text HLabel 4600 6850 0    50   BiDi ~ 0
FRONTEND_TEMP
Wire Notes Line
	3800 7700 3800 5750
Text Notes 3850 6000 0    50   ~ 0
Optional. Presence is detected in SW\nPopulate this circuitry, if a temperature compensation\nof the frontend is wanted
Text Notes 5450 750  0    100  ~ 20
Use low drift types for the marked resistors
Wire Notes Line
	5900 1700 5900 2150
Wire Notes Line
	5900 2150 6550 2150
Wire Notes Line
	6550 2150 6550 1700
Wire Notes Line
	6550 1700 5900 1700
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 1500 3500
Text Label 6400 3900 0    50   ~ 0
TEMP_OUT
$Comp
L Device:C C313
U 1 1 5E2394E4
P 6250 4650
F 0 "C313" V 6502 4650 50  0000 C CNN
F 1 "Bridge" V 6411 4650 50  0000 C CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 6288 4500 50  0001 C CNN
F 3 "~" H 6250 4650 50  0001 C CNN
	1    6250 4650
	1    0    0    -1  
$EndComp
Wire Wire Line
	6250 4800 6250 4900
$Comp
L power:GND #PWR0323
U 1 1 5E241AC0
P 6250 4900
F 0 "#PWR0323" H 6250 4650 50  0001 C CNN
F 1 "GND" H 6255 4727 50  0000 C CNN
F 2 "" H 6250 4900 50  0001 C CNN
F 3 "" H 6250 4900 50  0001 C CNN
	1    6250 4900
	1    0    0    -1  
$EndComp
Wire Notes Line
	3800 5750 6500 5750
Wire Notes Line
	3950 7700 6500 7700
Wire Notes Line
	6500 5750 6500 7700
Wire Wire Line
	2700 1650 2700 2050
$Comp
L power:GND #PWR0311
U 1 1 5E102FCD
P 3850 2150
F 0 "#PWR0311" 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
Wire Wire Line
	1500 3700 1300 3700
Wire Wire Line
	1300 3700 1300 4100
Wire Wire Line
	1300 4100 2450 4100
Wire Wire Line
	2450 4100 2450 4000
$Comp
L Device:C C305
U 1 1 5E232923
P 2450 3850
F 0 "C305" H 2565 3896 50  0000 L CNN
F 1 "100n" H 2565 3805 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 2488 3700 50  0001 C CNN
F 3 "~" H 2450 3850 50  0001 C CNN
	1    2450 3850
	1    0    0    -1  
$EndComp
Wire Wire Line
	2450 4100 2950 4100
Wire Wire Line
	2950 4100 2950 4000
Connection ~ 2450 4100
Wire Wire Line
	2450 3700 2450 3600
Connection ~ 2450 3600
Wire Wire Line
	2450 3600 2950 3600
Wire Wire Line
	2950 3700 2950 3600
Connection ~ 2950 3600
$Comp
L Device:R R305
U 1 1 5E255618
P 2950 3850
F 0 "R305" H 3020 3896 50  0000 L CNN
F 1 "1k 0.1%" H 3020 3805 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 2880 3850 50  0001 C CNN
F 3 "~" H 2950 3850 50  0001 C CNN
	1    2950 3850
	1    0    0    -1  
$EndComp
$Comp
L Device:R R302
U 1 1 5E25723A
P 1300 4350
F 0 "R302" H 1370 4396 50  0000 L CNN
F 1 "1k 0.1%" H 1370 4305 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1230 4350 50  0001 C CNN
F 3 "~" H 1300 4350 50  0001 C CNN
	1    1300 4350
	1    0    0    -1  
$EndComp
Wire Wire Line
	1300 4200 1300 4100
Connection ~ 1300 4100
Wire Wire Line
	1300 4500 1300 4600
$Comp
L power:GND #PWR0302
U 1 1 5E26828E
P 1300 4600
F 0 "#PWR0302" H 1300 4350 50  0001 C CNN
F 1 "GND" H 1305 4427 50  0000 C CNN
F 2 "" H 1300 4600 50  0001 C CNN
F 3 "" H 1300 4600 50  0001 C CNN
	1    1300 4600
	1    0    0    -1  
$EndComp
Text Label 700  5450 0    50   ~ 0
S-
Wire Wire Line
	700  5450 1450 5450
Wire Wire Line
	1450 5650 1250 5650
Wire Wire Line
	1250 5650 1250 6050
Wire Wire Line
	1250 6050 2400 6050
Wire Wire Line
	2400 6050 2400 5950
$Comp
L Device:C C304
U 1 1 5E292BC1
P 2400 5800
F 0 "C304" H 2515 5846 50  0000 L CNN
F 1 "100n" H 2515 5755 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 2438 5650 50  0001 C CNN
F 3 "~" H 2400 5800 50  0001 C CNN
	1    2400 5800
	1    0    0    -1  
$EndComp
Wire Wire Line
	2400 6050 2900 6050
Wire Wire Line
	2900 6050 2900 5950
Connection ~ 2400 6050
Wire Wire Line
	2400 5650 2400 5550
Connection ~ 2400 5550
Wire Wire Line
	2400 5550 2900 5550
Wire Wire Line
	2900 5650 2900 5550
Connection ~ 2900 5550
$Comp
L Device:R R304
U 1 1 5E292BD1
P 2900 5800
F 0 "R304" H 2970 5846 50  0000 L CNN
F 1 "1k 0.1%" H 2970 5755 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 2830 5800 50  0001 C CNN
F 3 "~" H 2900 5800 50  0001 C CNN
	1    2900 5800
	1    0    0    -1  
$EndComp
$Comp
L Device:R R301
U 1 1 5E292BD7
P 1250 6300
F 0 "R301" H 1320 6346 50  0000 L CNN
F 1 "1k 0.1%" H 1320 6255 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1180 6300 50  0001 C CNN
F 3 "~" H 1250 6300 50  0001 C CNN
	1    1250 6300
	1    0    0    -1  
$EndComp
Wire Wire Line
	1250 6150 1250 6050
Connection ~ 1250 6050
Wire Wire Line
	1250 6450 1250 6550
$Comp
L power:GND #PWR0301
U 1 1 5E292BE0
P 1250 6550
F 0 "#PWR0301" H 1250 6300 50  0001 C CNN
F 1 "GND" H 1255 6377 50  0000 C CNN
F 2 "" H 1250 6550 50  0001 C CNN
F 3 "" H 1250 6550 50  0001 C CNN
	1    1250 6550
	1    0    0    -1  
$EndComp
$Comp
L Device:R R307
U 1 1 5E333B2A
P 3600 3600
F 0 "R307" 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 "~" H 3600 3600 50  0001 C CNN
	1    3600 3600
	0    1    1    0   
$EndComp
Wire Wire Line
	2950 3600 3450 3600
Wire Wire Line
	3750 3600 4000 3600
Wire Wire Line
	4000 3600 4000 3800
Wire Wire Line
	4000 3800 4550 3800
Wire Wire Line
	4000 3800 4000 4200
Connection ~ 4000 3800
$Comp
L Device:R R309
U 1 1 5E352DB6
P 4000 4350
F 0 "R309" H 4070 4396 50  0000 L CNN
F 1 "5k 0.1%" H 4070 4305 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 3930 4350 50  0001 C CNN
F 3 "~" H 4000 4350 50  0001 C CNN
	1    4000 4350
	-1   0    0    1   
$EndComp
Wire Wire Line
	4000 4500 4000 4550
$Comp
L power:GND #PWR0312
U 1 1 5E35E6EA
P 4000 4550
F 0 "#PWR0312" H 4000 4300 50  0001 C CNN
F 1 "GND" H 4005 4377 50  0000 C CNN
F 2 "" H 4000 4550 50  0001 C CNN
F 3 "" H 4000 4550 50  0001 C CNN
	1    4000 4550
	1    0    0    -1  
$EndComp
Wire Wire Line
	4350 5550 4350 5400
Wire Wire Line
	2900 5550 4350 5550
$Comp
L Device:R R312
U 1 1 5E381FD9
P 4350 5250
F 0 "R312" H 4100 5300 50  0000 L CNN
F 1 "1k 0.1%" H 4000 5200 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 4280 5250 50  0001 C CNN
F 3 "~" H 4350 5250 50  0001 C CNN
	1    4350 5250
	-1   0    0    1   
$EndComp
Wire Wire Line
	4350 5100 4350 4350
Wire Wire Line
	4350 4350 5600 4350
Connection ~ 4350 4350
Wire Wire Line
	4350 4350 4350 4000
$Comp
L Device:R R314
U 1 1 5E3A5DAA
P 5600 4200
F 0 "R314" 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 "~" H 5600 4200 50  0001 C CNN
	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
	3550 4200 4100 4200
Wire Notes Line
	4100 4200 4100 4500
Wire Notes Line
	4100 4500 3550 4500
Wire Notes Line
	3550 4500 3550 4200
Wire Notes Line
	3800 4000 2850 4000
Wire Notes Line
	2850 4000 2850 3500
Wire Notes Line
	2850 3500 3800 3500
Wire Notes Line
	3800 3500 3800 4000
Wire Notes Line
	1050 6150 1050 6500
Wire Notes Line
	1050 6500 1750 6500
Wire Notes Line
	1750 6500 1750 6150
Wire Notes Line
	1050 6150 1750 6150
Wire Notes Line
	2750 5450 2750 6150
Wire Notes Line
	2750 6150 3350 6150
Wire Notes Line
	3350 6150 3350 5450
Wire Notes Line
	3350 5450 2750 5450
Wire Notes Line
	4200 5100 4200 5400
Wire Notes Line
	4200 5400 4750 5400
Wire Notes Line
	4750 5400 4750 5100
Wire Notes Line
	4750 5100 4200 5100
$Comp
L power:+3.3VA #PWR0325
U 1 1 5E4EDCE6
P 10350 2500
F 0 "#PWR0325" H 10350 2350 50  0001 C CNN
F 1 "+3.3VA" H 10365 2673 50  0000 C CNN
F 2 "" H 10350 2500 50  0001 C CNN
F 3 "" H 10350 2500 50  0001 C CNN
	1    10350 2500
	1    0    0    -1  
$EndComp
$Comp
L Reference_Voltage:TL431DBZ U303
U 1 1 5E5592F3
P 2700 1550
F 0 "U303" 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
	1    2700 1550
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C303
U 1 1 5E55CA76
P 2400 1900
F 0 "C303" H 2515 1946 50  0000 L CNN
F 1 "10u" H 2515 1855 50  0000 L CNN
F 2 "Capacitor_SMD:C_1210_3225Metric" H 2438 1750 50  0001 C CNN
F 3 "~" H 2400 1900 50  0001 C CNN
	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 #PWR0309
U 1 1 5E58A8D7
P 2700 700
F 0 "#PWR0309" 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 #PWR0314
U 1 1 5E58CB8A
P 9150 4500
F 0 "#PWR0314" 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
	7650 1400 9050 1400
Wire Wire Line
	8050 1500 8050 2000
Connection ~ 8050 1500
Wire Wire Line
	8050 1500 9550 1500
$Comp
L Device:R R318
U 1 1 5E5C0B2B
P 7850 2000
F 0 "R318" V 7643 2000 50  0000 C CNN
F 1 "2M" 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
	9050 1400 9050 1850
Wire Wire Line
	9550 1500 9550 1850
$Comp
L Device:C C315
U 1 1 5E656F7C
P 9300 1850
F 0 "C315" H 9415 1896 50  0000 L CNN
F 1 "22n" H 9415 1805 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 9338 1700 50  0001 C CNN
F 3 "~" H 9300 1850 50  0001 C CNN
	1    9300 1850
	0    1    1    0   
$EndComp
Wire Wire Line
	9150 1850 9050 1850
Wire Wire Line
	9450 1850 9550 1850
Wire Wire Line
	6250 4500 6250 4350
$Comp
L Device:R R315
U 1 1 5E696A10
P 5950 3900
F 0 "R315" V 5743 3900 50  0000 C CNN
F 1 "0" V 5834 3900 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 5880 3900 50  0001 C CNN
F 3 "~" H 5950 3900 50  0001 C CNN
	1    5950 3900
	0    -1   -1   0   
$EndComp
Wire Wire Line
	5600 3900 5800 3900
Wire Wire Line
	4350 4000 4350 3350
Connection ~ 4350 4000
$Comp
L Device:R R311
U 1 1 5E6BEB7A
P 4350 3200
F 0 "R311" H 4420 3246 50  0000 L CNN
F 1 "DNP" H 4420 3155 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 4280 3200 50  0001 C CNN
F 3 "~" H 4350 3200 50  0001 C CNN
	1    4350 3200
	-1   0    0    1   
$EndComp
$Comp
L Device:C C308
U 1 1 5E6BF72D
P 4550 3200
F 0 "C308" V 4298 3200 50  0000 C CNN
F 1 "DNP" V 4389 3200 50  0000 C CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 4588 3050 50  0001 C CNN
F 3 "~" H 4550 3200 50  0001 C CNN
	1    4550 3200
	-1   0    0    1   
$EndComp
Wire Wire Line
	4350 4000 4650 4000
Wire Wire Line
	4550 3800 4550 3350
Connection ~ 4550 3800
Wire Wire Line
	4550 3800 4650 3800
Wire Wire Line
	4550 3050 4550 3000
Wire Wire Line
	4550 3000 4350 3000
Wire Wire Line
	4350 3000 4350 3050
Connection ~ 6250 3900
Wire Wire Line
	6100 3900 6250 3900
Wire Wire Line
	6250 3900 6900 3900
$Comp
L Device:R R317
U 1 1 5DB0C2DA
P 6250 4050
F 0 "R317" V 6043 4050 50  0000 C CNN
F 1 "680" V 6134 4050 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 6180 4050 50  0001 C CNN
F 3 "~" H 6250 4050 50  0001 C CNN
	1    6250 4050
	-1   0    0    1   
$EndComp
Wire Wire Line
	6700 4500 6700 4350
Wire Wire Line
	6700 4350 6250 4350
Connection ~ 6250 4350
Wire Wire Line
	6250 4350 6250 4200
Wire Wire Line
	6700 4800 6700 4900
$Comp
L power:GND #PWR0324
U 1 1 5E8423F6
P 6700 4900
F 0 "#PWR0324" H 6700 4650 50  0001 C CNN
F 1 "GND" H 6705 4727 50  0000 C CNN
F 2 "" H 6700 4900 50  0001 C CNN
F 3 "" H 6700 4900 50  0001 C CNN
	1    6700 4900
	1    0    0    -1  
$EndComp
$Comp
L shimatta_analog:MCP6V34 U301
U 5 1 5E3F0A96
P 1600 3400
F 0 "U301" 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 "" H 1600 3400 50  0001 C CNN
	5    1600 3400
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0137
U 1 1 5E418AE0
P 9150 5800
F 0 "#PWR0137" 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 U301
U 3 1 5E44D369
P 4750 3700
F 0 "U301" 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 "" H 4750 3700 50  0001 C CNN
	3    4750 3700
	1    0    0    -1  
$EndComp
Wire Wire Line
	5100 1350 5500 1350
$Comp
L shimatta_analog:MCP6V34 U301
U 4 1 5E482137
P 1550 5350
F 0 "U301" H 1725 5515 50  0000 C CNN
F 1 "MCP6V34" H 1725 5424 50  0000 C CNN
F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 1550 5350 50  0001 C CNN
F 3 "" H 1550 5350 50  0001 C CNN
	4    1550 5350
	1    0    0    -1  
$EndComp
$Comp
L shimatta_analog:MCP6V34 U301
U 1 1 5E483253
P 8950 4850
F 0 "U301" 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 "" H 8950 4850 50  0001 C CNN
	1    8950 4850
	1    0    0    -1  
$EndComp
$Comp
L shimatta_analog:MCP6V34 U301
U 2 1 5E483E8E
P 4650 1150
F 0 "U301" 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 "" H 4650 1150 50  0001 C CNN
	2    4650 1150
	1    0    0    -1  
$EndComp
Wire Wire Line
	5200 3900 5250 3900
Wire Wire Line
	2050 3600 2450 3600
Wire Wire Line
	2000 5550 2400 5550
$Comp
L Device:R R319
U 1 1 5E6300E3
P 5400 3900
F 0 "R319" V 5193 3900 50  0000 C CNN
F 1 "100" 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 C314
U 1 1 5E82B184
P 6700 4650
F 0 "C314" V 6952 4650 50  0000 C CNN
F 1 "DNP" V 6861 4650 50  0000 C CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 6738 4500 50  0001 C CNN
F 3 "~" H 6700 4650 50  0001 C CNN
	1    6700 4650
	1    0    0    -1  
$EndComp
Text Notes 5350 4700 0    50   ~ 0
This must be shorted\n
Text Notes 6800 4400 0    50   ~ 0
If the circuit oscillates, try:\nR319 = 0 Ohm\nR317 = 250 Ohm\nC313 = 10 uF\nC314 = 2.2 uF\n
$Comp
L Connector:TestPoint TP302
U 1 1 5E42D334
P 6250 3550
F 0 "TP302" H 6308 3668 50  0000 L CNN
F 1 "TEMP_OUT" H 6308 3577 50  0000 L CNN
F 2 "TestPoint:TestPoint_Pad_D1.5mm" H 6450 3550 50  0001 C CNN
F 3 "~" H 6450 3550 50  0001 C CNN
	1    6250 3550
	1    0    0    -1  
$EndComp
Wire Wire Line
	6250 3550 6250 3900
Wire Wire Line
	3150 900  3150 1200
Connection ~ 3150 1200
Wire Wire Line
	3150 1200 3400 1200
$Comp
L Connector:TestPoint TP301
U 1 1 5E43ED77
P 3150 900
F 0 "TP301" 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 TP303
U 1 1 5E4680D7
P 5150 2200
F 0 "TP303" 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
$EndSCHEMATC