EESchema Schematic File Version 2
LIBS:power
LIBS:device
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
LIBS:microcontrollers
LIBS:dsp
LIBS:microchip
LIBS:analog_switches
LIBS:motorola
LIBS:texas
LIBS:intel
LIBS:audio
LIBS:interface
LIBS:digital-audio
LIBS:philips
LIBS:display
LIBS:cypress
LIBS:siliconi
LIBS:opto
LIBS:atmel
LIBS:contrib
LIBS:valves
LIBS:nocko
LIBS:bmi-8ch-cache
EELAYER 25 0
EELAYER END
$Descr USLetter 11000 8500
encoding utf-8
Sheet 1 5
Title "Polymer Sensor Amplifier"
Date "2017-03-26"
Rev "AB"
Comp "Monadnock Systems"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Sheet
S 750  950  950  750 
U 58D4647E
F0 "channel0-1" 60
F1 "channel0.sch" 60
F2 "Channel0" O R 1700 1100 60 
F3 "Channel1" O R 1700 1200 60 
$EndSheet
$Comp
L R R101
U 1 1 58D5759A
P 4550 4200
F 0 "R101" V 4630 4200 50  0000 C CNN
F 1 "50k" V 4550 4200 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 4480 4200 50  0001 C CNN
F 3 "" H 4550 4200 50  0001 C CNN
	1    4550 4200
	1    0    0    1   
$EndComp
$Comp
L R R102
U 1 1 58D57637
P 4550 4600
F 0 "R102" V 4630 4600 50  0000 C CNN
F 1 "50k" V 4550 4600 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 4480 4600 50  0001 C CNN
F 3 "" H 4550 4600 50  0001 C CNN
	1    4550 4600
	1    0    0    1   
$EndComp
Text Notes 5150 1400 0    60   ~ 0
Excitation Supply
Text Notes 5150 1450 0    39   ~ 0
Now directly from battery
$Comp
L CP C102
U 1 1 58D54979
P 6300 4250
F 0 "C102" H 6325 4350 50  0000 L CNN
F 1 "1µF" H 6325 4150 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 6338 4100 50  0001 C CNN
F 3 "" H 6300 4250 50  0001 C CNN
	1    6300 4250
	1    0    0    -1  
$EndComp
$Comp
L CP C103
U 1 1 58D54A48
P 6300 4750
F 0 "C103" H 6325 4850 50  0000 L CNN
F 1 "1µF" H 6325 4650 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 6338 4600 50  0001 C CNN
F 3 "" H 6300 4750 50  0001 C CNN
	1    6300 4750
	1    0    0    -1  
$EndComp
Text Notes 5700 3900 0    60   ~ 0
Virtual Ground
Text Notes 6360 5300 0    60   ~ 0
Noise Density: 12nV/√Hz\nVoltage Noise (0.1-10Hz): 0.2uV p-p\nOffset: <125uV\nDrift: <1.2uV/°C
Text Notes 850  6150 0    60   ~ 0
Notes:\n\nR101,R102: Resistor pack for good match
$Comp
L CONN_01X02 J102
U 1 1 58D60190
P 5900 1650
F 0 "J102" H 5900 1800 50  0000 C CNN
F 1 "Battery" V 6000 1650 50  0000 C CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm" H 5900 1650 50  0001 C CNN
F 3 "" H 5900 1650 50  0001 C CNN
	1    5900 1650
	-1   0    0    1   
$EndComp
$Comp
L PWR_FLAG #FLG01
U 1 1 58D603F8
P 6850 1600
F 0 "#FLG01" H 6850 1675 50  0001 C CNN
F 1 "PWR_FLAG" H 6650 1700 50  0001 C CNN
F 2 "" H 6850 1600 50  0001 C CNN
F 3 "" H 6850 1600 50  0001 C CNN
	1    6850 1600
	-1   0    0    1   
$EndComp
$Comp
L C C104
U 1 1 58D627F1
P 6300 1800
F 0 "C104" H 6325 1900 50  0000 L CNN
F 1 "1µF" H 6325 1700 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 6338 1650 50  0001 C CNN
F 3 "" H 6300 1800 50  0001 C CNN
	1    6300 1800
	1    0    0    -1  
$EndComp
$Sheet
S 750  1850 950  750 
U 58D6CBCD
F0 "channel2-3" 60
F1 "channel2.sch" 60
F2 "Channel2" O R 1700 2000 60 
F3 "Channel3" O R 1700 2100 60 
$EndSheet
$Sheet
S 750  2750 950  750 
U 58D6D2D8
F0 "channel4-5" 60
F1 "channel4.sch" 60
F2 "Channel4" O R 1700 2900 60 
F3 "Channel5" O R 1700 3000 60 
$EndSheet
$Sheet
S 750  3650 950  800 
U 58D6D794
F0 "channel6-7" 60
F1 "channel6.sch" 60
F2 "Channel6" O R 1700 3800 60 
F3 "Channel7" O R 1700 3900 60 
$EndSheet
$Comp
L CONN_01X01 J106
U 1 1 58D6FBAE
P 10350 2200
F 0 "J106" H 10450 2200 50  0000 C CNN
F 1 "CONN_01X01" V 10450 2200 50  0001 C CNN
F 2 "" H 10350 2200 50  0001 C CNN
F 3 "" H 10350 2200 50  0001 C CNN
	1    10350 2200
	1    0    0    1   
$EndComp
$Comp
L CONN_01X01 J105
U 1 1 58D702C5
P 10350 2050
F 0 "J105" H 10450 2050 50  0000 C CNN
F 1 "CONN_01X01" V 10450 2050 50  0001 C CNN
F 2 "" H 10350 2050 50  0001 C CNN
F 3 "" H 10350 2050 50  0001 C CNN
	1    10350 2050
	1    0    0    1   
$EndComp
$Comp
L CONN_01X01 J104
U 1 1 58D70306
P 10350 1900
F 0 "J104" H 10450 1900 50  0000 C CNN
F 1 "CONN_01X01" V 10450 1900 50  0001 C CNN
F 2 "" H 10350 1900 50  0001 C CNN
F 3 "" H 10350 1900 50  0001 C CNN
	1    10350 1900
	1    0    0    1   
$EndComp
$Comp
L CONN_01X01 J103
U 1 1 58D7034C
P 10350 1750
F 0 "J103" H 10450 1750 50  0000 C CNN
F 1 "CONN_01X01" V 10450 1750 50  0001 C CNN
F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 10350 1750 50  0001 C CNN
F 3 "" H 10350 1750 50  0001 C CNN
	1    10350 1750
	1    0    0    1   
$EndComp
$Comp
L GNDA #PWR02
U 1 1 58D7085C
P 10050 2350
F 0 "#PWR02" H 10050 2100 50  0001 C CNN
F 1 "GNDA" H 10050 2200 50  0000 C CNN
F 2 "" H 10050 2350 50  0001 C CNN
F 3 "" H 10050 2350 50  0001 C CNN
	1    10050 2350
	1    0    0    -1  
$EndComp
Text Notes 10150 1650 0    60   ~ 0
Mounting Holes
$Comp
L TEST_1P J114
U 1 1 58D70C8E
P 6550 4500
F 0 "J114" H 6550 4770 50  0000 C CNN
F 1 "VGND" H 6550 4700 50  0000 C CNN
F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Big" H 6750 4500 50  0001 C CNN
F 3 "" H 6750 4500 50  0001 C CNN
	1    6550 4500
	1    0    0    -1  
$EndComp
$Comp
L TEST_1P J108
U 1 1 58D711D7
P 9950 1750
F 0 "J108" H 9950 2020 50  0000 C CNN
F 1 "GND" H 9950 1950 50  0000 C CNN
F 2 "" H 10150 1750 50  0001 C CNN
F 3 "" H 10150 1750 50  0001 C CNN
	1    9950 1750
	0    -1   -1   0   
$EndComp
$Comp
L TEST_1P J109
U 1 1 58D712C3
P 9950 1900
F 0 "J109" H 9950 2170 50  0000 C CNN
F 1 "GND" H 9950 2100 50  0000 C CNN
F 2 "" H 10150 1900 50  0001 C CNN
F 3 "" H 10150 1900 50  0001 C CNN
	1    9950 1900
	0    -1   -1   0   
$EndComp
$Comp
L TEST_1P J110
U 1 1 58D71321
P 9950 2050
F 0 "J110" H 9950 2320 50  0000 C CNN
F 1 "GND" H 9950 2250 50  0000 C CNN
F 2 "" H 10150 2050 50  0001 C CNN
F 3 "" H 10150 2050 50  0001 C CNN
	1    9950 2050
	0    -1   -1   0   
$EndComp
$Comp
L TEST_1P J111
U 1 1 58D71376
P 9950 2200
F 0 "J111" H 9950 2470 50  0000 C CNN
F 1 "GND" H 9950 2400 50  0000 C CNN
F 2 "" H 10150 2200 50  0001 C CNN
F 3 "" H 10150 2200 50  0001 C CNN
	1    9950 2200
	0    -1   -1   0   
$EndComp
Text Notes 9500 1650 0    60   ~ 0
Test Points
$Comp
L CONN_01X12 J112
U 1 1 58D765D3
P 2850 2650
F 0 "J112" H 2850 3600 50  0000 C CNN
F 1 "ANALOG_OUT" V 2950 2650 50  0000 C CNN
F 2 "" H 2850 2650 50  0001 C CNN
F 3 "" H 2850 2650 50  0001 C CNN
	1    2850 2650
	1    0    0    -1  
$EndComp
Wire Wire Line
	4550 4350 4550 4450
Wire Wire Line
	4550 4400 5300 4400
Connection ~ 4550 4400
Wire Wire Line
	5300 4600 5300 4800
Wire Wire Line
	4550 4000 6300 4000
Wire Wire Line
	5550 4000 5550 4250
Wire Wire Line
	4550 4050 4550 4000
Wire Wire Line
	6300 4000 6300 4100
Connection ~ 5550 4000
Wire Wire Line
	6300 4400 6300 4600
Connection ~ 6300 4500
Wire Wire Line
	6150 4500 6150 4800
Wire Wire Line
	6150 4800 5300 4800
Wire Wire Line
	6100 1600 6850 1600
Wire Wire Line
	6100 1700 6100 2000
Connection ~ 6300 1600
Wire Wire Line
	6300 2000 6300 1950
Connection ~ 6300 2000
Wire Wire Line
	10150 2200 10150 1750
Wire Wire Line
	10050 2200 10050 2350
Connection ~ 10150 1900
Connection ~ 10150 2050
Connection ~ 10150 2200
Wire Wire Line
	9950 1750 9950 2200
Connection ~ 9950 1900
Connection ~ 9950 2050
Wire Wire Line
	9950 2200 10150 2200
Connection ~ 10050 2200
Connection ~ 9950 2200
Wire Wire Line
	2650 2100 2350 2100
Wire Wire Line
	2350 2100 2350 1100
Wire Wire Line
	2350 1100 1700 1100
Wire Wire Line
	2050 2200 2050 1200
Wire Wire Line
	2050 1200 1700 1200
Wire Wire Line
	1900 2000 1700 2000
Wire Wire Line
	1800 2100 1700 2100
Wire Wire Line
	1800 2900 1700 2900
Wire Wire Line
	1900 3000 1700 3000
Wire Wire Line
	2050 3000 2050 3800
Wire Wire Line
	2050 3800 1700 3800
Wire Wire Line
	2350 3100 2350 3900
Wire Wire Line
	2350 3900 1700 3900
$Comp
L GNDA #PWR03
U 1 1 58D76D50
P 2650 2300
F 0 "#PWR03" H 2650 2050 50  0001 C CNN
F 1 "GNDA" H 2650 2150 50  0000 C CNN
F 2 "" H 2650 2300 50  0001 C CNN
F 3 "" H 2650 2300 50  0001 C CNN
	1    2650 2300
	0    1    1    0   
$EndComp
$Comp
L GNDA #PWR04
U 1 1 58D76DD7
P 2650 2600
F 0 "#PWR04" H 2650 2350 50  0001 C CNN
F 1 "GNDA" H 2650 2450 50  0000 C CNN
F 2 "" H 2650 2600 50  0001 C CNN
F 3 "" H 2650 2600 50  0001 C CNN
	1    2650 2600
	0    1    1    0   
$EndComp
Wire Wire Line
	2650 2200 2050 2200
Wire Wire Line
	2650 2400 1900 2400
Wire Wire Line
	1900 2400 1900 2000
Wire Wire Line
	2650 2500 1800 2500
Wire Wire Line
	1800 2500 1800 2100
$Comp
L GNDA #PWR05
U 1 1 58D77F82
P 2650 2900
F 0 "#PWR05" H 2650 2650 50  0001 C CNN
F 1 "GNDA" H 2650 2750 50  0000 C CNN
F 2 "" H 2650 2900 50  0001 C CNN
F 3 "" H 2650 2900 50  0001 C CNN
	1    2650 2900
	0    1    1    0   
$EndComp
Wire Wire Line
	2650 3000 2050 3000
Wire Wire Line
	2650 3100 2350 3100
$Comp
L GNDA #PWR06
U 1 1 58D78218
P 2650 3200
F 0 "#PWR06" H 2650 2950 50  0001 C CNN
F 1 "GNDA" H 2650 3050 50  0000 C CNN
F 2 "" H 2650 3200 50  0001 C CNN
F 3 "" H 2650 3200 50  0001 C CNN
	1    2650 3200
	0    1    1    0   
$EndComp
Wire Wire Line
	2650 2700 1800 2700
Wire Wire Line
	1800 2700 1800 2900
Wire Wire Line
	2650 2800 1900 2800
Wire Wire Line
	1900 2800 1900 3000
$Comp
L V+ #PWR07
U 1 1 58D7E8FC
P 4550 4000
F 0 "#PWR07" H 4550 3850 50  0001 C CNN
F 1 "V+" H 4550 4140 50  0000 C CNN
F 2 "" H 4550 4000 50  0000 C CNN
F 3 "" H 4550 4000 50  0000 C CNN
	1    4550 4000
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR08
U 1 1 58D7EC90
P 4550 4900
F 0 "#PWR08" H 4550 4750 50  0001 C CNN
F 1 "V-" H 4550 5040 50  0000 C CNN
F 2 "" H 4550 4900 50  0000 C CNN
F 3 "" H 4550 4900 50  0000 C CNN
	1    4550 4900
	-1   0    0    1   
$EndComp
$Comp
L GNDA #PWR09
U 1 1 58D7EF65
P 6750 4500
F 0 "#PWR09" H 6750 4250 50  0001 C CNN
F 1 "GNDA" H 6750 4350 50  0000 C CNN
F 2 "" H 6750 4500 50  0001 C CNN
F 3 "" H 6750 4500 50  0001 C CNN
	1    6750 4500
	1    0    0    -1  
$EndComp
Wire Wire Line
	4550 4900 6300 4900
Connection ~ 4550 4900
$Comp
L AD8622 U101
U 1 1 58D8019A
P 5600 4500
F 0 "U101" H 5800 4650 50  0000 L CNN
F 1 "AD8622" H 5800 4350 50  0000 L CNN
F 2 "Housings_SSOP:MSOP-8_3x3mm_Pitch0.65mm" H 5600 4500 50  0001 C CNN
F 3 "" H 5600 4500 50  0001 C CNN
	1    5600 4500
	1    0    0    -1  
$EndComp
Wire Wire Line
	5550 4900 5550 4750
$Comp
L V+ #PWR010
U 1 1 58D80748
P 6850 1600
F 0 "#PWR010" H 6850 1450 50  0001 C CNN
F 1 "V+" H 6850 1740 50  0000 C CNN
F 2 "" H 6850 1600 50  0000 C CNN
F 3 "" H 6850 1600 50  0000 C CNN
	1    6850 1600
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR011
U 1 1 58D807E6
P 6850 2000
F 0 "#PWR011" H 6850 1850 50  0001 C CNN
F 1 "V-" H 6850 2140 50  0000 C CNN
F 2 "" H 6850 2000 50  0000 C CNN
F 3 "" H 6850 2000 50  0000 C CNN
	1    6850 2000
	-1   0    0    1   
$EndComp
$Comp
L TEST_2P J101
U 1 1 58D80884
P 6700 1800
F 0 "J101" H 6700 1860 50  0000 C CNN
F 1 "VBATT" H 6700 1730 50  0000 C CNN
F 2 "Measurement_Points:Test_Point_2Pads" H 6700 1800 50  0001 C CNN
F 3 "" H 6700 1800 50  0001 C CNN
	1    6700 1800
	0    1    1    0   
$EndComp
Connection ~ 6700 1600
Connection ~ 6700 2000
Wire Wire Line
	6300 1650 6300 1600
$Comp
L AD8622 U101
U 2 1 58D81B44
P 5550 5700
F 0 "U101" H 5750 5850 50  0000 L CNN
F 1 "AD8622" H 5750 5550 50  0000 L CNN
F 2 "Housings_SSOP:MSOP-8_3x3mm_Pitch0.65mm" H 5550 5700 50  0001 C CNN
F 3 "" H 5550 5700 50  0001 C CNN
	2    5550 5700
	1    0    0    -1  
$EndComp
$Comp
L V+ #PWR012
U 1 1 58D81C02
P 5500 5450
F 0 "#PWR012" H 5500 5300 50  0001 C CNN
F 1 "V+" H 5500 5590 50  0000 C CNN
F 2 "" H 5500 5450 50  0000 C CNN
F 3 "" H 5500 5450 50  0000 C CNN
	1    5500 5450
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR013
U 1 1 58D81C79
P 5500 5950
F 0 "#PWR013" H 5500 5800 50  0001 C CNN
F 1 "V-" H 5500 6090 50  0000 C CNN
F 2 "" H 5500 5950 50  0000 C CNN
F 3 "" H 5500 5950 50  0000 C CNN
	1    5500 5950
	-1   0    0    1   
$EndComp
Wire Wire Line
	5250 5800 5050 5800
Wire Wire Line
	5050 5800 5050 6250
Wire Wire Line
	5050 6250 6250 6250
Wire Wire Line
	6250 6250 6250 5700
Wire Wire Line
	6250 5700 5850 5700
$Comp
L GNDA #PWR014
U 1 1 58D81D91
P 5250 5600
F 0 "#PWR014" H 5250 5350 50  0001 C CNN
F 1 "GNDA" H 5250 5450 50  0000 C CNN
F 2 "" H 5250 5600 50  0001 C CNN
F 3 "" H 5250 5600 50  0001 C CNN
	1    5250 5600
	0    1    1    0   
$EndComp
Text Notes 6000 5650 0    60   ~ 0
Unused
Wire Wire Line
	5900 4500 6750 4500
Connection ~ 6550 4500
Wire Wire Line
	6100 2000 6850 2000
Wire Wire Line
	4550 4900 4550 4750
Connection ~ 5550 4900
Connection ~ 6150 4500
$Comp
L PWR_FLAG #FLG015
U 1 1 58D93F01
P 6850 2000
F 0 "#FLG015" H 6850 2075 50  0001 C CNN
F 1 "PWR_FLAG" H 6650 2100 50  0001 C CNN
F 2 "" H 6850 2000 50  0001 C CNN
F 3 "" H 6850 2000 50  0001 C CNN
	1    6850 2000
	1    0    0    -1  
$EndComp
$EndSCHEMATC