SH-ESP32-engine-hat/analog_input.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 5 5
Title "Engine Top Hat for SH-ESP32"
Date "2021-04-27"
Rev "0.1.0"
Comp "Hat Labs Ltd"
Comment1 "https://creativecommons.org/licenses/by-sa/4.0"
Comment2 "To view a copy of this license, visit "
Comment3 "This design is licensed under CC BY-SA 4.0."
Comment4 ""
$EndDescr
$Comp
L Amplifier_Operational:LMV324 U501
U 1 1 606CD82F
P 1350 1600
F 0 "U501" H 1350 2000 50  0000 C CNN
F 1 "LMV324" H 1350 1900 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 1300 1700 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lmv324.pdf" H 1400 1800 50  0001 C CNN
F 4 "C362275" H 1350 1600 50  0001 C CNN "LCSC"
	1    1350 1600
	1    0    0    1   
$EndComp
$Comp
L Amplifier_Operational:LMV324 U501
U 2 1 606CEC39
P 1350 3150
F 0 "U501" H 1350 3517 50  0000 C CNN
F 1 "LMV324" H 1350 3426 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 1300 3250 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lmv324.pdf" H 1400 3350 50  0001 C CNN
F 4 "C362275" H 1350 3150 50  0001 C CNN "LCSC"
	2    1350 3150
	1    0    0    1   
$EndComp
$Comp
L Amplifier_Operational:LMV324 U501
U 3 1 606CF9D4
P 1350 4650
F 0 "U501" H 1350 5017 50  0000 C CNN
F 1 "LMV324" H 1350 4926 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 1300 4750 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lmv324.pdf" H 1400 4850 50  0001 C CNN
F 4 "C362275" H 1350 4650 50  0001 C CNN "LCSC"
	3    1350 4650
	1    0    0    1   
$EndComp
$Comp
L Amplifier_Operational:LMV324 U501
U 4 1 606D0CB1
P 1350 6050
F 0 "U501" H 1350 6417 50  0000 C CNN
F 1 "LMV324" H 1350 6326 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 1300 6150 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lmv324.pdf" H 1400 6250 50  0001 C CNN
F 4 "C362275" H 1350 6050 50  0001 C CNN "LCSC"
	4    1350 6050
	1    0    0    1   
$EndComp
$Comp
L Amplifier_Operational:LMV324 U501
U 5 1 606D1D11
P 1800 7150
F 0 "U501" H 1758 7196 50  0000 L CNN
F 1 "LMV324" H 1758 7105 50  0000 L CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 1750 7250 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lmv324.pdf" H 1850 7350 50  0001 C CNN
F 4 "C362275" H 1800 7150 50  0001 C CNN "LCSC"
	5    1800 7150
	1    0    0    -1  
$EndComp
$Comp
L Device:Q_PNP_BEC Q501
U 1 1 606D488B
P 1950 1600
F 0 "Q501" H 2140 1554 50  0000 L CNN
F 1 "S9015" H 2140 1645 50  0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-323_SC-70" H 2150 1700 50  0001 C CNN
F 3 "~" H 1950 1600 50  0001 C CNN
F 4 "C106811" H 1950 1600 50  0001 C CNN "LCSC"
	1    1950 1600
	1    0    0    1   
$EndComp
Wire Wire Line
	1650 1600 1750 1600
Wire Wire Line
	2050 1400 2050 1250
Wire Wire Line
	2050 1250 1850 1250
Wire Wire Line
	950  1250 950  1500
Wire Wire Line
	950  1500 1050 1500
$Comp
L Device:R R505
U 1 1 606F57F1
P 2050 1050
F 0 "R505" H 2120 1096 50  0000 L CNN
F 1 "30" H 2120 1005 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1980 1050 50  0001 C CNN
F 3 "~" H 2050 1050 50  0001 C CNN
F 4 "C22985" H 2050 1050 50  0001 C CNN "LCSC"
	1    2050 1050
	1    0    0    -1  
$EndComp
$Comp
L Device:R R509
U 1 1 606F668E
P 3150 6500
F 0 "R509" H 3220 6546 50  0000 L CNN
F 1 "1k" H 3220 6455 50  0000 L CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 3080 6500 50  0001 C CNN
F 3 "~" H 3150 6500 50  0001 C CNN
F 4 "C11702" H 3150 6500 50  0001 C CNN "LCSC"
	1    3150 6500
	1    0    0    -1  
$EndComp
$Comp
L Device:R R510
U 1 1 606F7547
P 3150 7000
F 0 "R510" H 3220 7046 50  0000 L CNN
F 1 "10k" H 3220 6955 50  0000 L CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 3080 7000 50  0001 C CNN
F 3 "~" H 3150 7000 50  0001 C CNN
F 4 "C25744" H 3150 7000 50  0001 C CNN "LCSC"
	1    3150 7000
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0514
U 1 1 606F976D
P 3150 7200
F 0 "#PWR0514" H 3150 6950 50  0001 C CNN
F 1 "GND" H 3155 7027 50  0000 C CNN
F 2 "" H 3150 7200 50  0001 C CNN
F 3 "" H 3150 7200 50  0001 C CNN
	1    3150 7200
	1    0    0    -1  
$EndComp
$Comp
L power:+3V3 #PWR0513
U 1 1 606F9EBD
P 3150 6300
F 0 "#PWR0513" H 3150 6150 50  0001 C CNN
F 1 "+3V3" H 3165 6473 50  0000 C CNN
F 2 "" H 3150 6300 50  0001 C CNN
F 3 "" H 3150 6300 50  0001 C CNN
	1    3150 6300
	1    0    0    -1  
$EndComp
Wire Wire Line
	3150 6300 3150 6350
Wire Wire Line
	3150 6650 3150 6750
Wire Wire Line
	3150 7200 3150 7150
Wire Wire Line
	3150 6750 3450 6750
Connection ~ 3150 6750
Wire Wire Line
	3150 6750 3150 6850
Text Label 3450 6750 0    50   ~ 0
Vin
Text Label 900  1700 2    50   ~ 0
Vin
Wire Wire Line
	900  1700 1050 1700
$Comp
L power:+3V3 #PWR0506
U 1 1 606FD552
P 1700 6650
F 0 "#PWR0506" H 1700 6500 50  0001 C CNN
F 1 "+3V3" H 1715 6823 50  0000 C CNN
F 2 "" H 1700 6650 50  0001 C CNN
F 3 "" H 1700 6650 50  0001 C CNN
	1    1700 6650
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0507
U 1 1 606FDC5A
P 1700 7550
F 0 "#PWR0507" H 1700 7300 50  0001 C CNN
F 1 "GND" H 1705 7377 50  0000 C CNN
F 2 "" H 1700 7550 50  0001 C CNN
F 3 "" H 1700 7550 50  0001 C CNN
	1    1700 7550
	1    0    0    -1  
$EndComp
Wire Wire Line
	1700 7550 1700 7450
Wire Wire Line
	1700 6850 1700 6800
$Comp
L Device:C C505
U 1 1 60700404
P 1450 7000
F 0 "C505" H 1565 7046 50  0000 L CNN
F 1 "100nF" H 1565 6955 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 1488 6850 50  0001 C CNN
F 3 "~" H 1450 7000 50  0001 C CNN
F 4 "C1525" H 1450 7000 50  0001 C CNN "LCSC"
	1    1450 7000
	-1   0    0    -1  
$EndComp
Wire Wire Line
	1450 6850 1450 6800
Wire Wire Line
	1450 6800 1700 6800
Connection ~ 1700 6800
Wire Wire Line
	1700 6800 1700 6650
$Comp
L power:GND #PWR0505
U 1 1 60700E57
P 1450 7200
F 0 "#PWR0505" H 1450 6950 50  0001 C CNN
F 1 "GND" H 1455 7027 50  0000 C CNN
F 2 "" H 1450 7200 50  0001 C CNN
F 3 "" H 1450 7200 50  0001 C CNN
	1    1450 7200
	1    0    0    -1  
$EndComp
Wire Wire Line
	1450 7200 1450 7150
Wire Wire Line
	2050 1250 2050 1200
Connection ~ 2050 1250
$Comp
L power:+3V3 #PWR0508
U 1 1 60701FCB
P 2050 850
F 0 "#PWR0508" H 2050 700 50  0001 C CNN
F 1 "+3V3" H 2065 1023 50  0000 C CNN
F 2 "" H 2050 850 50  0001 C CNN
F 3 "" H 2050 850 50  0001 C CNN
	1    2050 850 
	1    0    0    -1  
$EndComp
Wire Wire Line
	2050 900  2050 850 
$Comp
L Connector_Generic:Conn_02x04_Odd_Even J502
U 1 1 60702E78
P 3500 3650
F 0 "J502" H 3450 3950 50  0000 L CNN
F 1 "Conn_02x04" H 3300 3850 50  0000 L CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Horizontal" H 3500 3650 50  0001 C CNN
F 3 "~" H 3500 3650 50  0001 C CNN
F 4 "C358706" H 3500 3650 50  0001 C CNN "LCSC"
	1    3500 3650
	1    0    0    -1  
$EndComp
Text Notes 3550 6550 0    50   ~ 0
Vin = 3.0 V
Text Label 2200 1950 0    50   ~ 0
IoutA
Wire Wire Line
	2200 1950 2050 1950
Wire Wire Line
	2050 1950 2050 1800
Text Notes 2100 1400 0    50   ~ 0
I = (Vcc - Vin) / R\n  = 10 mA
Text Notes 3050 3150 0    50   ~ 0
To tank senders.\nMax measurable resistance\n320 ohms.
$Comp
L Device:C C506
U 1 1 6072ABE5
P 2900 7050
F 0 "C506" H 3015 7096 50  0000 L CNN
F 1 "68nF" H 3015 7005 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 2938 6900 50  0001 C CNN
F 3 "~" H 2900 7050 50  0001 C CNN
F 4 "C31658" H 2900 7050 50  0001 C CNN "LCSC"
	1    2900 7050
	-1   0    0    -1  
$EndComp
Wire Wire Line
	2900 6900 2900 6750
Wire Wire Line
	2900 6750 3150 6750
$Comp
L power:GND #PWR0512
U 1 1 6072BCC3
P 2900 7200
F 0 "#PWR0512" H 2900 6950 50  0001 C CNN
F 1 "GND" H 2905 7027 50  0000 C CNN
F 2 "" H 2900 7200 50  0001 C CNN
F 3 "" H 2900 7200 50  0001 C CNN
	1    2900 7200
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R511
U 1 1 60730D86
P 7200 1500
F 0 "R511" V 6993 1500 50  0000 C CNN
F 1 "51k" V 7084 1500 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 7130 1500 50  0001 C CNN
F 3 "~" H 7200 1500 50  0001 C CNN
F 4 "C25794" H 7200 1500 50  0001 C CNN "LCSC"
	1    7200 1500
	-1   0    0    1   
$EndComp
$Comp
L Device:C_Small C515
U 1 1 60731E02
P 7600 1850
F 0 "C515" H 7715 1896 50  0000 L CNN
F 1 "470nF" H 7715 1805 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 7638 1700 50  0001 C CNN
F 3 "~" H 7600 1850 50  0001 C CNN
F 4 "C47339" H 7600 1850 50  0001 C CNN "LCSC"
	1    7600 1850
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0532
U 1 1 607323CA
P 7600 2000
F 0 "#PWR0532" H 7600 1750 50  0001 C CNN
F 1 "GND" H 7605 1827 50  0000 C CNN
F 2 "" H 7600 2000 50  0001 C CNN
F 3 "" H 7600 2000 50  0001 C CNN
	1    7600 2000
	1    0    0    -1  
$EndComp
Wire Wire Line
	7600 2000 7600 1950
Text Label 6550 1350 2    50   ~ 0
InFA
Wire Wire Line
	7800 1700 7600 1700
Wire Wire Line
	7600 1750 7600 1700
Connection ~ 7600 1700
Text Notes 7250 1150 0    50   ~ 0
LP-filter with cutoff\nat 93 Hz
$Comp
L Device:C C501
U 1 1 607457D9
P 950 1000
F 0 "C501" H 836 954 50  0000 R CNN
F 1 "100nF" H 836 1045 50  0000 R CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 988 850 50  0001 C CNN
F 3 "~" H 950 1000 50  0001 C CNN
F 4 "C1525" H 950 1000 50  0001 C CNN "LCSC"
	1    950  1000
	1    0    0    1   
$EndComp
$Comp
L Device:R R501
U 1 1 6074C014
P 1700 1250
F 0 "R501" V 1493 1250 50  0000 C CNN
F 1 "1k" V 1584 1250 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 1630 1250 50  0001 C CNN
F 3 "~" H 1700 1250 50  0001 C CNN
F 4 "C11702" H 1700 1250 50  0001 C CNN "LCSC"
	1    1700 1250
	0    1    1    0   
$EndComp
Wire Wire Line
	1550 1250 950  1250
Wire Wire Line
	950  1250 950  1150
Connection ~ 950  1250
$Comp
L power:+3V3 #PWR0501
U 1 1 6074EEF5
P 950 850
F 0 "#PWR0501" H 950 700 50  0001 C CNN
F 1 "+3V3" H 965 1023 50  0000 C CNN
F 2 "" H 950 850 50  0001 C CNN
F 3 "" H 950 850 50  0001 C CNN
	1    950  850 
	1    0    0    -1  
$EndComp
Text Notes 1100 1000 0    50   ~ 0
Filter cap to 3.3V to \navoid a current swing\nat startup.
$Comp
L Device:Q_PNP_BEC Q502
U 1 1 6077AFF0
P 1950 3150
F 0 "Q502" H 2140 3104 50  0000 L CNN
F 1 "S9015" H 2140 3195 50  0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-323_SC-70" H 2150 3250 50  0001 C CNN
F 3 "~" H 1950 3150 50  0001 C CNN
F 4 "C106811" H 1950 3150 50  0001 C CNN "LCSC"
	1    1950 3150
	1    0    0    1   
$EndComp
Wire Wire Line
	1650 3150 1750 3150
Wire Wire Line
	2050 2950 2050 2800
Wire Wire Line
	2050 2800 1850 2800
Wire Wire Line
	950  2800 950  3050
Wire Wire Line
	950  3050 1050 3050
$Comp
L Device:R R506
U 1 1 6077AFFB
P 2050 2600
F 0 "R506" H 2120 2646 50  0000 L CNN
F 1 "30" H 2120 2555 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1980 2600 50  0001 C CNN
F 3 "~" H 2050 2600 50  0001 C CNN
F 4 "C22985" H 2050 2600 50  0001 C CNN "LCSC"
	1    2050 2600
	1    0    0    -1  
$EndComp
Text Label 900  3250 2    50   ~ 0
Vin
Wire Wire Line
	900  3250 1050 3250
Wire Wire Line
	2050 2800 2050 2750
Connection ~ 2050 2800
$Comp
L power:+3V3 #PWR0509
U 1 1 6077B005
P 2050 2400
F 0 "#PWR0509" H 2050 2250 50  0001 C CNN
F 1 "+3V3" H 2065 2573 50  0000 C CNN
F 2 "" H 2050 2400 50  0001 C CNN
F 3 "" H 2050 2400 50  0001 C CNN
	1    2050 2400
	1    0    0    -1  
$EndComp
Wire Wire Line
	2050 2450 2050 2400
Text Label 2200 3500 0    50   ~ 0
IoutB
Wire Wire Line
	2200 3500 2050 3500
Wire Wire Line
	2050 3500 2050 3350
$Comp
L Device:C C502
U 1 1 6077B022
P 950 2550
F 0 "C502" H 836 2504 50  0000 R CNN
F 1 "100nF" H 836 2595 50  0000 R CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 988 2400 50  0001 C CNN
F 3 "~" H 950 2550 50  0001 C CNN
F 4 "C1525" H 950 2550 50  0001 C CNN "LCSC"
	1    950  2550
	1    0    0    1   
$EndComp
$Comp
L Device:R R502
U 1 1 6077B028
P 1700 2800
F 0 "R502" V 1493 2800 50  0000 C CNN
F 1 "1k" V 1584 2800 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 1630 2800 50  0001 C CNN
F 3 "~" H 1700 2800 50  0001 C CNN
F 4 "C11702" H 1700 2800 50  0001 C CNN "LCSC"
	1    1700 2800
	0    1    1    0   
$EndComp
Wire Wire Line
	1550 2800 950  2800
Wire Wire Line
	950  2800 950  2700
Connection ~ 950  2800
$Comp
L power:+3V3 #PWR0502
U 1 1 6077B031
P 950 2400
F 0 "#PWR0502" H 950 2250 50  0001 C CNN
F 1 "+3V3" H 965 2573 50  0000 C CNN
F 2 "" H 950 2400 50  0001 C CNN
F 3 "" H 950 2400 50  0001 C CNN
	1    950  2400
	1    0    0    -1  
$EndComp
Text Notes 3450 6250 0    50   ~ 0
Reference voltage for\ncurrent supplies
Text Label 3150 2000 2    50   ~ 0
IoutA
Text Label 3150 2100 2    50   ~ 0
IoutB
Wire Wire Line
	7200 1350 7200 1400
$Comp
L Device:R_Small R512
U 1 1 60D31368
P 7200 1850
F 0 "R512" V 6993 1850 50  0000 C CNN
F 1 "3.9k" V 7084 1850 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 7130 1850 50  0001 C CNN
F 3 "~" H 7200 1850 50  0001 C CNN
F 4 "C51721" H 7200 1850 50  0001 C CNN "LCSC"
	1    7200 1850
	-1   0    0    1   
$EndComp
Wire Wire Line
	7200 1600 7200 1700
Wire Wire Line
	7200 1700 7600 1700
Connection ~ 7200 1700
Wire Wire Line
	7200 1700 7200 1750
$Comp
L power:GND #PWR0528
U 1 1 60D33526
P 7200 2000
F 0 "#PWR0528" H 7200 1750 50  0001 C CNN
F 1 "GND" H 7205 1827 50  0000 C CNN
F 2 "" H 7200 2000 50  0001 C CNN
F 3 "" H 7200 2000 50  0001 C CNN
	1    7200 2000
	1    0    0    -1  
$EndComp
Wire Wire Line
	7200 2000 7200 1950
Text Label 5400 1500 0    50   ~ 0
InFA
$Comp
L Device:C_Small C507
U 1 1 60D3B9B0
P 4800 1650
F 0 "C507" H 4892 1696 50  0000 L CNN
F 1 "1uF" H 4892 1605 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 4800 1650 50  0001 C CNN
F 3 "~" H 4800 1650 50  0001 C CNN
F 4 "C15849" H 4800 1650 50  0001 C CNN "LCSC"
	1    4800 1650
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C511
U 1 1 60D3BDE6
P 5200 1650
F 0 "C511" H 5292 1696 50  0000 L CNN
F 1 "1uF" H 5292 1605 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 5200 1650 50  0001 C CNN
F 3 "~" H 5200 1650 50  0001 C CNN
F 4 "C52923" H 5200 1650 50  0001 C CNN "LCSC"
	1    5200 1650
	1    0    0    -1  
$EndComp
$Comp
L Device:Ferrite_Bead_Small FB501
U 1 1 60D3CC10
P 5000 1500
F 0 "FB501" V 4763 1500 50  0000 C CNN
F 1 "GZ2012D601TF" V 4854 1500 50  0000 C CNN
F 2 "Inductor_SMD:L_0805_2012Metric" V 4930 1500 50  0001 C CNN
F 3 "~" H 5000 1500 50  0001 C CNN
F 4 "C1017" H 5000 1500 50  0001 C CNN "LCSC"
	1    5000 1500
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR0516
U 1 1 60D3D2AB
P 4800 1800
F 0 "#PWR0516" H 4800 1550 50  0001 C CNN
F 1 "GND" H 4805 1627 50  0000 C CNN
F 2 "" H 4800 1800 50  0001 C CNN
F 3 "" H 4800 1800 50  0001 C CNN
	1    4800 1800
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0520
U 1 1 60D3D75B
P 5200 1800
F 0 "#PWR0520" H 5200 1550 50  0001 C CNN
F 1 "GND" H 5205 1627 50  0000 C CNN
F 2 "" H 5200 1800 50  0001 C CNN
F 3 "" H 5200 1800 50  0001 C CNN
	1    5200 1800
	1    0    0    -1  
$EndComp
Text Label 3650 2000 0    50   ~ 0
InA
Text Label 3300 3550 2    50   ~ 0
InA
Text Label 4550 1500 2    50   ~ 0
InA
Wire Wire Line
	4550 1500 4800 1500
Wire Wire Line
	5100 1500 5200 1500
Wire Wire Line
	5200 1550 5200 1500
Connection ~ 5200 1500
Wire Wire Line
	5200 1500 5400 1500
Wire Wire Line
	5200 1800 5200 1750
Wire Wire Line
	4800 1800 4800 1750
Wire Wire Line
	4800 1550 4800 1500
Connection ~ 4800 1500
Wire Wire Line
	4800 1500 4900 1500
$Comp
L Device:D_Zener_Small D501
U 1 1 60D5990E
P 6750 1750
F 0 "D501" V 6704 1820 50  0000 L CNN
F 1 "SMF33A" V 6795 1820 50  0000 L CNN
F 2 "Diode_SMD:D_SOD-123F" H 6750 1750 50  0001 C CNN
F 3 "~" H 6750 1750 50  0001 C CNN
F 4 "C523840" V 6750 1750 50  0001 C CNN "LCSC"
	1    6750 1750
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR0524
U 1 1 60D5F491
P 6750 2000
F 0 "#PWR0524" H 6750 1750 50  0001 C CNN
F 1 "GND" H 6755 1827 50  0000 C CNN
F 2 "" H 6750 2000 50  0001 C CNN
F 3 "" H 6750 2000 50  0001 C CNN
	1    6750 2000
	1    0    0    -1  
$EndComp
Wire Wire Line
	6750 2000 6750 1850
Wire Wire Line
	6750 1650 6750 1350
Wire Wire Line
	6750 1350 7200 1350
Connection ~ 6750 1350
Wire Wire Line
	6550 1350 6750 1350
Text Notes 8300 1750 0    50   ~ 0
Voltage divider splitting\n29V to 2.048V
Text Label 5400 2400 0    50   ~ 0
InFB
$Comp
L Device:C_Small C508
U 1 1 60D707E9
P 4800 2550
F 0 "C508" H 4892 2596 50  0000 L CNN
F 1 "1uF" H 4892 2505 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 4800 2550 50  0001 C CNN
F 3 "~" H 4800 2550 50  0001 C CNN
F 4 "C15849" H 4800 2550 50  0001 C CNN "LCSC"
	1    4800 2550
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C512
U 1 1 60D707EF
P 5200 2550
F 0 "C512" H 5292 2596 50  0000 L CNN
F 1 "1uF" H 5292 2505 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 5200 2550 50  0001 C CNN
F 3 "~" H 5200 2550 50  0001 C CNN
F 4 "C52923" H 5200 2550 50  0001 C CNN "LCSC"
	1    5200 2550
	1    0    0    -1  
$EndComp
$Comp
L Device:Ferrite_Bead_Small FB502
U 1 1 60D707F5
P 5000 2400
F 0 "FB502" V 4763 2400 50  0000 C CNN
F 1 "GZ2012D601TF" V 4854 2400 50  0000 C CNN
F 2 "Inductor_SMD:L_0805_2012Metric" V 4930 2400 50  0001 C CNN
F 3 "~" H 5000 2400 50  0001 C CNN
F 4 "C1017" H 5000 2400 50  0001 C CNN "LCSC"
	1    5000 2400
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR0517
U 1 1 60D707FB
P 4800 2700
F 0 "#PWR0517" H 4800 2450 50  0001 C CNN
F 1 "GND" H 4805 2527 50  0000 C CNN
F 2 "" H 4800 2700 50  0001 C CNN
F 3 "" H 4800 2700 50  0001 C CNN
	1    4800 2700
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0521
U 1 1 60D70801
P 5200 2700
F 0 "#PWR0521" H 5200 2450 50  0001 C CNN
F 1 "GND" H 5205 2527 50  0000 C CNN
F 2 "" H 5200 2700 50  0001 C CNN
F 3 "" H 5200 2700 50  0001 C CNN
	1    5200 2700
	1    0    0    -1  
$EndComp
Text Label 4550 2400 2    50   ~ 0
InB
Wire Wire Line
	4550 2400 4800 2400
Wire Wire Line
	5100 2400 5200 2400
Wire Wire Line
	5200 2450 5200 2400
Connection ~ 5200 2400
Wire Wire Line
	5200 2400 5400 2400
Wire Wire Line
	5200 2700 5200 2650
Wire Wire Line
	4800 2700 4800 2650
Wire Wire Line
	4800 2450 4800 2400
Connection ~ 4800 2400
Wire Wire Line
	4800 2400 4900 2400
$Comp
L Device:Q_PNP_BEC Q503
U 1 1 60D88160
P 1950 4650
F 0 "Q503" H 2140 4604 50  0000 L CNN
F 1 "S9015" H 2140 4695 50  0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-323_SC-70" H 2150 4750 50  0001 C CNN
F 3 "~" H 1950 4650 50  0001 C CNN
F 4 "C106811" H 1950 4650 50  0001 C CNN "LCSC"
	1    1950 4650
	1    0    0    1   
$EndComp
Wire Wire Line
	1650 4650 1750 4650
Wire Wire Line
	2050 4450 2050 4300
Wire Wire Line
	2050 4300 1850 4300
Wire Wire Line
	950  4300 950  4550
Wire Wire Line
	950  4550 1050 4550
$Comp
L Device:R R507
U 1 1 60D8816C
P 2050 4100
F 0 "R507" H 2120 4146 50  0000 L CNN
F 1 "30" H 2120 4055 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1980 4100 50  0001 C CNN
F 3 "~" H 2050 4100 50  0001 C CNN
F 4 "C22985" H 2050 4100 50  0001 C CNN "LCSC"
	1    2050 4100
	1    0    0    -1  
$EndComp
Text Label 900  4750 2    50   ~ 0
Vin
Wire Wire Line
	900  4750 1050 4750
Wire Wire Line
	2050 4300 2050 4250
Connection ~ 2050 4300
$Comp
L power:+3V3 #PWR0510
U 1 1 60D88176
P 2050 3900
F 0 "#PWR0510" H 2050 3750 50  0001 C CNN
F 1 "+3V3" H 2065 4073 50  0000 C CNN
F 2 "" H 2050 3900 50  0001 C CNN
F 3 "" H 2050 3900 50  0001 C CNN
	1    2050 3900
	1    0    0    -1  
$EndComp
Wire Wire Line
	2050 3950 2050 3900
Text Label 2200 5000 0    50   ~ 0
IoutC
Wire Wire Line
	2200 5000 2050 5000
Wire Wire Line
	2050 5000 2050 4850
$Comp
L Device:C C503
U 1 1 60D88181
P 950 4050
F 0 "C503" H 836 4004 50  0000 R CNN
F 1 "100nF" H 836 4095 50  0000 R CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 988 3900 50  0001 C CNN
F 3 "~" H 950 4050 50  0001 C CNN
F 4 "C1525" H 950 4050 50  0001 C CNN "LCSC"
	1    950  4050
	1    0    0    1   
$EndComp
$Comp
L Device:R R503
U 1 1 60D88188
P 1700 4300
F 0 "R503" V 1493 4300 50  0000 C CNN
F 1 "1k" V 1584 4300 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 1630 4300 50  0001 C CNN
F 3 "~" H 1700 4300 50  0001 C CNN
F 4 "C11702" H 1700 4300 50  0001 C CNN "LCSC"
	1    1700 4300
	0    1    1    0   
$EndComp
Wire Wire Line
	1550 4300 950  4300
Wire Wire Line
	950  4300 950  4200
Connection ~ 950  4300
$Comp
L power:+3V3 #PWR0503
U 1 1 60D88191
P 950 3900
F 0 "#PWR0503" H 950 3750 50  0001 C CNN
F 1 "+3V3" H 965 4073 50  0000 C CNN
F 2 "" H 950 3900 50  0001 C CNN
F 3 "" H 950 3900 50  0001 C CNN
	1    950  3900
	1    0    0    -1  
$EndComp
$Comp
L Device:Q_PNP_BEC Q504
U 1 1 60D98893
P 1950 6050
F 0 "Q504" H 2140 6004 50  0000 L CNN
F 1 "S9015" H 2140 6095 50  0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-323_SC-70" H 2150 6150 50  0001 C CNN
F 3 "~" H 1950 6050 50  0001 C CNN
F 4 "C106811" H 1950 6050 50  0001 C CNN "LCSC"
	1    1950 6050
	1    0    0    1   
$EndComp
Wire Wire Line
	1650 6050 1750 6050
Wire Wire Line
	2050 5850 2050 5700
Wire Wire Line
	2050 5700 1850 5700
Wire Wire Line
	950  5700 950  5950
Wire Wire Line
	950  5950 1050 5950
$Comp
L Device:R R508
U 1 1 60D9889F
P 2050 5500
F 0 "R508" H 2120 5546 50  0000 L CNN
F 1 "30" H 2120 5455 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1980 5500 50  0001 C CNN
F 3 "~" H 2050 5500 50  0001 C CNN
F 4 "C22985" H 2050 5500 50  0001 C CNN "LCSC"
	1    2050 5500
	1    0    0    -1  
$EndComp
Text Label 900  6150 2    50   ~ 0
Vin
Wire Wire Line
	900  6150 1050 6150
Wire Wire Line
	2050 5700 2050 5650
Connection ~ 2050 5700
$Comp
L power:+3V3 #PWR0511
U 1 1 60D988A9
P 2050 5300
F 0 "#PWR0511" H 2050 5150 50  0001 C CNN
F 1 "+3V3" H 2065 5473 50  0000 C CNN
F 2 "" H 2050 5300 50  0001 C CNN
F 3 "" H 2050 5300 50  0001 C CNN
	1    2050 5300
	1    0    0    -1  
$EndComp
Wire Wire Line
	2050 5350 2050 5300
Text Label 2200 6400 0    50   ~ 0
IoutD
Wire Wire Line
	2200 6400 2050 6400
Wire Wire Line
	2050 6400 2050 6250
$Comp
L Device:C C504
U 1 1 60D988B4
P 950 5450
F 0 "C504" H 836 5404 50  0000 R CNN
F 1 "100nF" H 836 5495 50  0000 R CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 988 5300 50  0001 C CNN
F 3 "~" H 950 5450 50  0001 C CNN
F 4 "C1525" H 950 5450 50  0001 C CNN "LCSC"
	1    950  5450
	1    0    0    1   
$EndComp
$Comp
L Device:R R504
U 1 1 60D988BB
P 1700 5700
F 0 "R504" V 1493 5700 50  0000 C CNN
F 1 "1k" V 1584 5700 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 1630 5700 50  0001 C CNN
F 3 "~" H 1700 5700 50  0001 C CNN
F 4 "C11702" H 1700 5700 50  0001 C CNN "LCSC"
	1    1700 5700
	0    1    1    0   
$EndComp
Wire Wire Line
	1550 5700 950  5700
Wire Wire Line
	950  5700 950  5600
Connection ~ 950  5700
$Comp
L power:+3V3 #PWR0504
U 1 1 60D988C4
P 950 5300
F 0 "#PWR0504" H 950 5150 50  0001 C CNN
F 1 "+3V3" H 965 5473 50  0000 C CNN
F 2 "" H 950 5300 50  0001 C CNN
F 3 "" H 950 5300 50  0001 C CNN
	1    950  5300
	1    0    0    -1  
$EndComp
Text Label 3150 2200 2    50   ~ 0
IoutC
Text Label 3150 2300 2    50   ~ 0
IoutD
Text Label 5400 3250 0    50   ~ 0
InFC
$Comp
L Device:C_Small C509
U 1 1 60DB79CA
P 4800 3400
F 0 "C509" H 4892 3446 50  0000 L CNN
F 1 "1uF" H 4892 3355 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 4800 3400 50  0001 C CNN
F 3 "~" H 4800 3400 50  0001 C CNN
F 4 "C15849" H 4800 3400 50  0001 C CNN "LCSC"
	1    4800 3400
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C513
U 1 1 60DB79D0
P 5200 3400
F 0 "C513" H 5292 3446 50  0000 L CNN
F 1 "1uF" H 5292 3355 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 5200 3400 50  0001 C CNN
F 3 "~" H 5200 3400 50  0001 C CNN
F 4 "C52923" H 5200 3400 50  0001 C CNN "LCSC"
	1    5200 3400
	1    0    0    -1  
$EndComp
$Comp
L Device:Ferrite_Bead_Small FB503
U 1 1 60DB79D6
P 5000 3250
F 0 "FB503" V 4763 3250 50  0000 C CNN
F 1 "GZ2012D601TF" V 4854 3250 50  0000 C CNN
F 2 "Inductor_SMD:L_0805_2012Metric" V 4930 3250 50  0001 C CNN
F 3 "~" H 5000 3250 50  0001 C CNN
F 4 "C1017" H 5000 3250 50  0001 C CNN "LCSC"
	1    5000 3250
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR0518
U 1 1 60DB79DC
P 4800 3550
F 0 "#PWR0518" H 4800 3300 50  0001 C CNN
F 1 "GND" H 4805 3377 50  0000 C CNN
F 2 "" H 4800 3550 50  0001 C CNN
F 3 "" H 4800 3550 50  0001 C CNN
	1    4800 3550
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0522
U 1 1 60DB79E2
P 5200 3550
F 0 "#PWR0522" H 5200 3300 50  0001 C CNN
F 1 "GND" H 5205 3377 50  0000 C CNN
F 2 "" H 5200 3550 50  0001 C CNN
F 3 "" H 5200 3550 50  0001 C CNN
	1    5200 3550
	1    0    0    -1  
$EndComp
Text Label 4550 3250 2    50   ~ 0
InC
Wire Wire Line
	4550 3250 4800 3250
Wire Wire Line
	5100 3250 5200 3250
Wire Wire Line
	5200 3300 5200 3250
Connection ~ 5200 3250
Wire Wire Line
	5200 3250 5400 3250
Wire Wire Line
	5200 3550 5200 3500
Wire Wire Line
	4800 3550 4800 3500
Wire Wire Line
	4800 3300 4800 3250
Connection ~ 4800 3250
Wire Wire Line
	4800 3250 4900 3250
Text Label 5400 4150 0    50   ~ 0
InFD
$Comp
L Device:C_Small C510
U 1 1 60DB79F4
P 4800 4300
F 0 "C510" H 4892 4346 50  0000 L CNN
F 1 "1uF" H 4892 4255 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 4800 4300 50  0001 C CNN
F 3 "~" H 4800 4300 50  0001 C CNN
F 4 "C15849" H 4800 4300 50  0001 C CNN "LCSC"
	1    4800 4300
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C514
U 1 1 60DB79FA
P 5200 4300
F 0 "C514" H 5292 4346 50  0000 L CNN
F 1 "1uF" H 5292 4255 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 5200 4300 50  0001 C CNN
F 3 "~" H 5200 4300 50  0001 C CNN
F 4 "C52923" H 5200 4300 50  0001 C CNN "LCSC"
	1    5200 4300
	1    0    0    -1  
$EndComp
$Comp
L Device:Ferrite_Bead_Small FB504
U 1 1 60DB7A00
P 5000 4150
F 0 "FB504" V 4763 4150 50  0000 C CNN
F 1 "GZ2012D601TF" V 4854 4150 50  0000 C CNN
F 2 "Inductor_SMD:L_0805_2012Metric" V 4930 4150 50  0001 C CNN
F 3 "~" H 5000 4150 50  0001 C CNN
F 4 "C1017" H 5000 4150 50  0001 C CNN "LCSC"
	1    5000 4150
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR0519
U 1 1 60DB7A06
P 4800 4450
F 0 "#PWR0519" H 4800 4200 50  0001 C CNN
F 1 "GND" H 4805 4277 50  0000 C CNN
F 2 "" H 4800 4450 50  0001 C CNN
F 3 "" H 4800 4450 50  0001 C CNN
	1    4800 4450
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0523
U 1 1 60DB7A0C
P 5200 4450
F 0 "#PWR0523" H 5200 4200 50  0001 C CNN
F 1 "GND" H 5205 4277 50  0000 C CNN
F 2 "" H 5200 4450 50  0001 C CNN
F 3 "" H 5200 4450 50  0001 C CNN
	1    5200 4450
	1    0    0    -1  
$EndComp
Text Label 4550 4150 2    50   ~ 0
InD
Wire Wire Line
	4550 4150 4800 4150
Wire Wire Line
	5100 4150 5200 4150
Wire Wire Line
	5200 4200 5200 4150
Connection ~ 5200 4150
Wire Wire Line
	5200 4150 5400 4150
Wire Wire Line
	5200 4450 5200 4400
Wire Wire Line
	4800 4450 4800 4400
Wire Wire Line
	4800 4200 4800 4150
Connection ~ 4800 4150
Wire Wire Line
	4800 4150 4900 4150
$Comp
L Device:R_Small R513
U 1 1 60DF60F2
P 7200 2600
F 0 "R513" V 6993 2600 50  0000 C CNN
F 1 "51k" V 7084 2600 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 7130 2600 50  0001 C CNN
F 3 "~" H 7200 2600 50  0001 C CNN
F 4 "C25794" H 7200 2600 50  0001 C CNN "LCSC"
	1    7200 2600
	-1   0    0    1   
$EndComp
$Comp
L Device:C_Small C516
U 1 1 60DF60F9
P 7600 2950
F 0 "C516" H 7715 2996 50  0000 L CNN
F 1 "470nF" H 7715 2905 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 7638 2800 50  0001 C CNN
F 3 "~" H 7600 2950 50  0001 C CNN
F 4 "C47339" H 7600 2950 50  0001 C CNN "LCSC"
	1    7600 2950
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0533
U 1 1 60DF60FF
P 7600 3100
F 0 "#PWR0533" H 7600 2850 50  0001 C CNN
F 1 "GND" H 7605 2927 50  0000 C CNN
F 2 "" H 7600 3100 50  0001 C CNN
F 3 "" H 7600 3100 50  0001 C CNN
	1    7600 3100
	1    0    0    -1  
$EndComp
Wire Wire Line
	7600 3100 7600 3050
Text Label 6550 2450 2    50   ~ 0
InFB
Wire Wire Line
	7800 2800 7600 2800
Wire Wire Line
	7600 2850 7600 2800
Connection ~ 7600 2800
Wire Wire Line
	7200 2450 7200 2500
$Comp
L Device:R_Small R514
U 1 1 60DF610D
P 7200 2950
F 0 "R514" V 6993 2950 50  0000 C CNN
F 1 "3.9k" V 7084 2950 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 7130 2950 50  0001 C CNN
F 3 "~" H 7200 2950 50  0001 C CNN
F 4 "C51721" H 7200 2950 50  0001 C CNN "LCSC"
	1    7200 2950
	-1   0    0    1   
$EndComp
Wire Wire Line
	7200 2700 7200 2800
Wire Wire Line
	7200 2800 7600 2800
Connection ~ 7200 2800
Wire Wire Line
	7200 2800 7200 2850
$Comp
L power:GND #PWR0529
U 1 1 60DF6117
P 7200 3100
F 0 "#PWR0529" H 7200 2850 50  0001 C CNN
F 1 "GND" H 7205 2927 50  0000 C CNN
F 2 "" H 7200 3100 50  0001 C CNN
F 3 "" H 7200 3100 50  0001 C CNN
	1    7200 3100
	1    0    0    -1  
$EndComp
Wire Wire Line
	7200 3100 7200 3050
$Comp
L Device:D_Zener_Small D502
U 1 1 60DF611E
P 6750 2850
F 0 "D502" V 6704 2920 50  0000 L CNN
F 1 "SMF33A" V 6795 2920 50  0000 L CNN
F 2 "Diode_SMD:D_SOD-123F" H 6750 2850 50  0001 C CNN
F 3 "~" H 6750 2850 50  0001 C CNN
F 4 "C523840" V 6750 2850 50  0001 C CNN "LCSC"
	1    6750 2850
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR0525
U 1 1 60DF6124
P 6750 3100
F 0 "#PWR0525" H 6750 2850 50  0001 C CNN
F 1 "GND" H 6755 2927 50  0000 C CNN
F 2 "" H 6750 3100 50  0001 C CNN
F 3 "" H 6750 3100 50  0001 C CNN
	1    6750 3100
	1    0    0    -1  
$EndComp
Wire Wire Line
	6750 3100 6750 2950
Wire Wire Line
	6750 2750 6750 2450
Wire Wire Line
	6750 2450 7200 2450
Connection ~ 6750 2450
Wire Wire Line
	6550 2450 6750 2450
$Comp
L Device:R_Small R515
U 1 1 60DFA64C
P 7200 3650
F 0 "R515" V 6993 3650 50  0000 C CNN
F 1 "51k" V 7084 3650 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 7130 3650 50  0001 C CNN
F 3 "~" H 7200 3650 50  0001 C CNN
F 4 "C25794" H 7200 3650 50  0001 C CNN "LCSC"
	1    7200 3650
	-1   0    0    1   
$EndComp
$Comp
L Device:C_Small C517
U 1 1 60DFA653
P 7600 4000
F 0 "C517" H 7715 4046 50  0000 L CNN
F 1 "470nF" H 7715 3955 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 7638 3850 50  0001 C CNN
F 3 "~" H 7600 4000 50  0001 C CNN
F 4 "C47339" H 7600 4000 50  0001 C CNN "LCSC"
	1    7600 4000
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0534
U 1 1 60DFA659
P 7600 4150
F 0 "#PWR0534" H 7600 3900 50  0001 C CNN
F 1 "GND" H 7605 3977 50  0000 C CNN
F 2 "" H 7600 4150 50  0001 C CNN
F 3 "" H 7600 4150 50  0001 C CNN
	1    7600 4150
	1    0    0    -1  
$EndComp
Wire Wire Line
	7600 4150 7600 4100
Text Label 6550 3500 2    50   ~ 0
InFC
Wire Wire Line
	7800 3850 7600 3850
Wire Wire Line
	7600 3900 7600 3850
Connection ~ 7600 3850
Wire Wire Line
	7200 3500 7200 3550
$Comp
L Device:R_Small R516
U 1 1 60DFA667
P 7200 4000
F 0 "R516" V 6993 4000 50  0000 C CNN
F 1 "3.9k" V 7084 4000 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 7130 4000 50  0001 C CNN
F 3 "~" H 7200 4000 50  0001 C CNN
F 4 "C51721" H 7200 4000 50  0001 C CNN "LCSC"
	1    7200 4000
	-1   0    0    1   
$EndComp
Wire Wire Line
	7200 3750 7200 3850
Wire Wire Line
	7200 3850 7600 3850
Connection ~ 7200 3850
Wire Wire Line
	7200 3850 7200 3900
$Comp
L power:GND #PWR0530
U 1 1 60DFA671
P 7200 4150
F 0 "#PWR0530" H 7200 3900 50  0001 C CNN
F 1 "GND" H 7205 3977 50  0000 C CNN
F 2 "" H 7200 4150 50  0001 C CNN
F 3 "" H 7200 4150 50  0001 C CNN
	1    7200 4150
	1    0    0    -1  
$EndComp
Wire Wire Line
	7200 4150 7200 4100
$Comp
L Device:D_Zener_Small D503
U 1 1 60DFA678
P 6750 3900
F 0 "D503" V 6704 3970 50  0000 L CNN
F 1 "SMF33A" V 6795 3970 50  0000 L CNN
F 2 "Diode_SMD:D_SOD-123F" H 6750 3900 50  0001 C CNN
F 3 "~" H 6750 3900 50  0001 C CNN
F 4 "C523840" V 6750 3900 50  0001 C CNN "LCSC"
	1    6750 3900
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR0526
U 1 1 60DFA67E
P 6750 4150
F 0 "#PWR0526" H 6750 3900 50  0001 C CNN
F 1 "GND" H 6755 3977 50  0000 C CNN
F 2 "" H 6750 4150 50  0001 C CNN
F 3 "" H 6750 4150 50  0001 C CNN
	1    6750 4150
	1    0    0    -1  
$EndComp
Wire Wire Line
	6750 4150 6750 4000
Wire Wire Line
	6750 3800 6750 3500
Wire Wire Line
	6750 3500 7200 3500
Connection ~ 6750 3500
Wire Wire Line
	6550 3500 6750 3500
$Comp
L Device:R_Small R517
U 1 1 60E01208
P 7200 4700
F 0 "R517" V 6993 4700 50  0000 C CNN
F 1 "51k" V 7084 4700 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 7130 4700 50  0001 C CNN
F 3 "~" H 7200 4700 50  0001 C CNN
F 4 "C25794" H 7200 4700 50  0001 C CNN "LCSC"
	1    7200 4700
	-1   0    0    1   
$EndComp
$Comp
L Device:C_Small C518
U 1 1 60E0120F
P 7600 5050
F 0 "C518" H 7715 5096 50  0000 L CNN
F 1 "470nF" H 7715 5005 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 7638 4900 50  0001 C CNN
F 3 "~" H 7600 5050 50  0001 C CNN
F 4 "C47339" H 7600 5050 50  0001 C CNN "LCSC"
	1    7600 5050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0535
U 1 1 60E01215
P 7600 5200
F 0 "#PWR0535" H 7600 4950 50  0001 C CNN
F 1 "GND" H 7605 5027 50  0000 C CNN
F 2 "" H 7600 5200 50  0001 C CNN
F 3 "" H 7600 5200 50  0001 C CNN
	1    7600 5200
	1    0    0    -1  
$EndComp
Wire Wire Line
	7600 5200 7600 5150
Text Label 6550 4550 2    50   ~ 0
InFD
Wire Wire Line
	7800 4900 7600 4900
Wire Wire Line
	7600 4950 7600 4900
Connection ~ 7600 4900
Wire Wire Line
	7200 4550 7200 4600
$Comp
L Device:R_Small R518
U 1 1 60E01223
P 7200 5050
F 0 "R518" V 6993 5050 50  0000 C CNN
F 1 "3.9k" V 7084 5050 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric" V 7130 5050 50  0001 C CNN
F 3 "~" H 7200 5050 50  0001 C CNN
F 4 "C51721" H 7200 5050 50  0001 C CNN "LCSC"
	1    7200 5050
	-1   0    0    1   
$EndComp
Wire Wire Line
	7200 4800 7200 4900
Wire Wire Line
	7200 4900 7600 4900
Connection ~ 7200 4900
Wire Wire Line
	7200 4900 7200 4950
$Comp
L power:GND #PWR0531
U 1 1 60E0122D
P 7200 5200
F 0 "#PWR0531" H 7200 4950 50  0001 C CNN
F 1 "GND" H 7205 5027 50  0000 C CNN
F 2 "" H 7200 5200 50  0001 C CNN
F 3 "" H 7200 5200 50  0001 C CNN
	1    7200 5200
	1    0    0    -1  
$EndComp
Wire Wire Line
	7200 5200 7200 5150
$Comp
L Device:D_Zener_Small D504
U 1 1 60E01234
P 6750 4950
F 0 "D504" V 6704 5020 50  0000 L CNN
F 1 "SMF33A" V 6795 5020 50  0000 L CNN
F 2 "Diode_SMD:D_SOD-123F" H 6750 4950 50  0001 C CNN
F 3 "~" H 6750 4950 50  0001 C CNN
F 4 "C523840" V 6750 4950 50  0001 C CNN "LCSC"
	1    6750 4950
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR0527
U 1 1 60E0123A
P 6750 5200
F 0 "#PWR0527" H 6750 4950 50  0001 C CNN
F 1 "GND" H 6755 5027 50  0000 C CNN
F 2 "" H 6750 5200 50  0001 C CNN
F 3 "" H 6750 5200 50  0001 C CNN
	1    6750 5200
	1    0    0    -1  
$EndComp
Wire Wire Line
	6750 5200 6750 5050
Wire Wire Line
	6750 4850 6750 4550
Wire Wire Line
	6750 4550 7200 4550
Connection ~ 6750 4550
Wire Wire Line
	6550 4550 6750 4550
Text Label 3300 3650 2    50   ~ 0
InB
Text Label 3300 3750 2    50   ~ 0
InC
Text Label 3300 3850 2    50   ~ 0
InD
$Comp
L power:GND #PWR0515
U 1 1 60E093B5
P 3800 3950
F 0 "#PWR0515" H 3800 3700 50  0001 C CNN
F 1 "GND" H 3805 3777 50  0000 C CNN
F 2 "" H 3800 3950 50  0001 C CNN
F 3 "" H 3800 3950 50  0001 C CNN
	1    3800 3950
	1    0    0    -1  
$EndComp
Text Label 3650 2100 0    50   ~ 0
InB
Text Label 3650 2200 0    50   ~ 0
InC
Text Label 3650 2300 0    50   ~ 0
InD
$Comp
L Analog_ADC:ADS1115IDGS U502
U 1 1 60E32CA7
P 9800 3650
F 0 "U502" H 9900 4350 50  0000 C CNN
F 1 "ADS1115IDGS" H 10100 4250 50  0000 C CNN
F 2 "Package_SO:TSSOP-10_3x3mm_P0.5mm" H 9800 3150 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/ads1113.pdf" H 9750 2750 50  0001 C CNN
F 4 "C37593" H 9800 3650 50  0001 C CNN "LCSC"
	1    9800 3650
	1    0    0    -1  
$EndComp
Text Label 7800 1700 0    50   ~ 0
ADC_A
Text Label 7800 2800 0    50   ~ 0
ADC_B
Text Label 7800 3850 0    50   ~ 0
ADC_C
Text Label 7800 4900 0    50   ~ 0
ADC_D
$Comp
L power:GND #PWR0538
U 1 1 60E35CDC
P 9800 4150
F 0 "#PWR0538" H 9800 3900 50  0001 C CNN
F 1 "GND" H 9805 3977 50  0000 C CNN
F 2 "" H 9800 4150 50  0001 C CNN
F 3 "" H 9800 4150 50  0001 C CNN
	1    9800 4150
	1    0    0    -1  
$EndComp
$Comp
L power:+3V3 #PWR0537
U 1 1 60E36069
P 9800 2600
F 0 "#PWR0537" H 9800 2450 50  0001 C CNN
F 1 "+3V3" H 9815 2773 50  0000 C CNN
F 2 "" H 9800 2600 50  0001 C CNN
F 3 "" H 9800 2600 50  0001 C CNN
	1    9800 2600
	1    0    0    -1  
$EndComp
Wire Wire Line
	9800 3150 9800 2700
$Comp
L Device:C_Small C519
U 1 1 60E3D51B
P 9500 2850
F 0 "C519" H 9615 2896 50  0000 L CNN
F 1 "100nF" H 9615 2805 50  0000 L CNN
F 2 "Capacitor_SMD:C_0402_1005Metric" H 9538 2700 50  0001 C CNN
F 3 "~" H 9500 2850 50  0001 C CNN
F 4 "C1525" H 9500 2850 50  0001 C CNN "LCSC"
	1    9500 2850
	-1   0    0    -1  
$EndComp
$Comp
L power:GND #PWR0536
U 1 1 60E3E099
P 9500 3000
F 0 "#PWR0536" H 9500 2750 50  0001 C CNN
F 1 "GND" H 9505 2827 50  0000 C CNN
F 2 "" H 9500 3000 50  0001 C CNN
F 3 "" H 9500 3000 50  0001 C CNN
	1    9500 3000
	1    0    0    -1  
$EndComp
Wire Wire Line
	9500 3000 9500 2950
Wire Wire Line
	9500 2750 9500 2700
Wire Wire Line
	9500 2700 9800 2700
Connection ~ 9800 2700
Wire Wire Line
	9800 2700 9800 2600
NoConn ~ 10200 3450
Wire Wire Line
	10200 3850 10350 3850
Wire Wire Line
	10350 3850 10350 3650
Wire Wire Line
	10350 3650 10200 3650
Wire Wire Line
	10350 3650 10500 3650
Connection ~ 10350 3650
Wire Wire Line
	10200 3750 10500 3750
Text Label 9400 3550 2    50   ~ 0
ADC_A
Text Label 9400 3650 2    50   ~ 0
ADC_B
Text Label 9400 3750 2    50   ~ 0
ADC_C
Text Label 9400 3850 2    50   ~ 0
ADC_D
Text HLabel 10500 3650 2    50   Input ~ 0
SCL
Text HLabel 10500 3750 2    50   Input ~ 0
SDA
Wire Wire Line
	9800 4150 9800 4050
Wire Wire Line
	3800 3950 3800 3850
Connection ~ 3800 3650
Wire Wire Line
	3800 3650 3800 3550
Connection ~ 3800 3750
Wire Wire Line
	3800 3750 3800 3650
Connection ~ 3800 3850
Wire Wire Line
	3800 3850 3800 3750
$Comp
L Connector_Generic:Conn_02x04_Odd_Even J501
U 1 1 61210DF1
P 3350 2100
F 0 "J501" H 3400 2417 50  0000 C CNN
F 1 "Conn_02x04_Odd_Even" H 3400 2326 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical" H 3350 2100 50  0001 C CNN
F 3 "~" H 3350 2100 50  0001 C CNN
F 4 "C124386" H 3350 2100 50  0001 C CNN "LCSC"
	1    3350 2100
	1    0    0    -1  
$EndComp
Text Notes 3050 1700 0    50   ~ 0
Connect headers with a jumper\nto enable the constant current\nsource (active resistance\nmeasurement).
$EndSCHEMATC