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 1220 2000 950  750 
U 58D4647E
F0 "channel0-1" 60
F1 "channel0.sch" 60
F2 "Channel0" O R 2170 2350 60 
F3 "Channel1" O R 2170 2250 60 
$EndSheet
$Comp
L R R101
U 1 1 58D5759A
P 5820 4200
F 0 "R101" V 5900 4200 50  0000 C CNN
F 1 "50k" V 5820 4200 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 5750 4200 50  0001 C CNN
F 3 "" H 5820 4200 50  0001 C CNN
	1    5820 4200
	1    0    0    1   
$EndComp
$Comp
L R R102
U 1 1 58D57637
P 5820 4600
F 0 "R102" V 5900 4600 50  0000 C CNN
F 1 "50k" V 5820 4600 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 5750 4600 50  0001 C CNN
F 3 "" H 5820 4600 50  0001 C CNN
	1    5820 4600
	1    0    0    1   
$EndComp
Text Notes 6190 1400 0    60   ~ 0
Excitation Supply
Text Notes 6190 1450 0    39   ~ 0
Now directly from battery
$Comp
L CP C102
U 1 1 58D54979
P 7570 4250
F 0 "C102" H 7595 4350 50  0000 L CNN
F 1 "1µF" H 7595 4150 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 7608 4100 50  0001 C CNN
F 3 "" H 7570 4250 50  0001 C CNN
	1    7570 4250
	1    0    0    -1  
$EndComp
$Comp
L CP C103
U 1 1 58D54A48
P 7570 4750
F 0 "C103" H 7595 4850 50  0000 L CNN
F 1 "1µF" H 7595 4650 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 7608 4600 50  0001 C CNN
F 3 "" H 7570 4750 50  0001 C CNN
	1    7570 4750
	1    0    0    -1  
$EndComp
Text Notes 6970 3900 0    60   ~ 0
Virtual Ground
Text Notes 7630 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 2110 6160 0    60   ~ 0
Notes:\n\nR101,R102: Resistor pack for good match
$Comp
L CONN_01X02 J102
U 1 1 58D60190
P 6940 1650
F 0 "J102" H 6940 1800 50  0000 C CNN
F 1 "Battery" V 7040 1650 50  0000 C CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm" H 6940 1650 50  0001 C CNN
F 3 "" H 6940 1650 50  0001 C CNN
	1    6940 1650
	-1   0    0    1   
$EndComp
$Comp
L PWR_FLAG #FLG01
U 1 1 58D603F8
P 7890 1600
F 0 "#FLG01" H 7890 1675 50  0001 C CNN
F 1 "PWR_FLAG" H 7690 1700 50  0001 C CNN
F 2 "" H 7890 1600 50  0001 C CNN
F 3 "" H 7890 1600 50  0001 C CNN
	1    7890 1600
	-1   0    0    1   
$EndComp
$Comp
L C C104
U 1 1 58D627F1
P 7340 1800
F 0 "C104" H 7365 1900 50  0000 L CNN
F 1 "1µF" H 7365 1700 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 7378 1650 50  0001 C CNN
F 3 "" H 7340 1800 50  0001 C CNN
	1    7340 1800
	1    0    0    -1  
$EndComp
$Sheet
S 2950 2860 750  950 
U 58D6CBCD
F0 "channel2-3" 60
F1 "channel2.sch" 60
F2 "Channel2" O T 3340 2860 60 
F3 "Channel3" O T 3450 2860 60 
$EndSheet
$Sheet
S 2930 950  750  950 
U 58D6D2D8
F0 "channel4-5" 60
F1 "channel4.sch" 60
F2 "Channel4" O B 3470 1900 60 
F3 "Channel5" O B 3570 1900 60 
$EndSheet
$Sheet
S 4320 1950 950  800 
U 58D6D794
F0 "channel6-7" 60
F1 "channel6.sch" 60
F2 "Channel6" O L 4320 2070 60 
F3 "Channel7" O L 4320 2180 60 
$EndSheet
$Comp
L CONN_01X01 J106
U 1 1 58D6FBAE
P 9490 1930
F 0 "J106" H 9590 1930 50  0000 C CNN
F 1 "CONN_01X01" V 9590 1930 50  0001 C CNN
F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 9490 1930 50  0001 C CNN
F 3 "" H 9490 1930 50  0001 C CNN
	1    9490 1930
	1    0    0    1   
$EndComp
$Comp
L CONN_01X01 J105
U 1 1 58D702C5
P 9490 1780
F 0 "J105" H 9590 1780 50  0000 C CNN
F 1 "CONN_01X01" V 9590 1780 50  0001 C CNN
F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 9490 1780 50  0001 C CNN
F 3 "" H 9490 1780 50  0001 C CNN
	1    9490 1780
	1    0    0    1   
$EndComp
$Comp
L CONN_01X01 J104
U 1 1 58D70306
P 9490 1630
F 0 "J104" H 9590 1630 50  0000 C CNN
F 1 "CONN_01X01" V 9590 1630 50  0001 C CNN
F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 9490 1630 50  0001 C CNN
F 3 "" H 9490 1630 50  0001 C CNN
	1    9490 1630
	1    0    0    1   
$EndComp
$Comp
L CONN_01X01 J103
U 1 1 58D7034C
P 9490 1480
F 0 "J103" H 9590 1480 50  0000 C CNN
F 1 "CONN_01X01" V 9590 1480 50  0001 C CNN
F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 9490 1480 50  0001 C CNN
F 3 "" H 9490 1480 50  0001 C CNN
	1    9490 1480
	1    0    0    1   
$EndComp
$Comp
L GNDA #PWR02
U 1 1 58D7085C
P 9190 2080
F 0 "#PWR02" H 9190 1830 50  0001 C CNN
F 1 "GNDA" H 9190 1930 50  0000 C CNN
F 2 "" H 9190 2080 50  0001 C CNN
F 3 "" H 9190 2080 50  0001 C CNN
	1    9190 2080
	1    0    0    -1  
$EndComp
Text Notes 9290 1380 0    60   ~ 0
Mounting Holes
$Comp
L TEST_1P J114
U 1 1 58D70C8E
P 7820 4500
F 0 "J114" H 7820 4770 50  0000 C CNN
F 1 "VGND" H 7820 4700 50  0000 C CNN
F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Big" H 8020 4500 50  0001 C CNN
F 3 "" H 8020 4500 50  0001 C CNN
	1    7820 4500
	1    0    0    -1  
$EndComp
$Comp
L CONN_01X12 J112
U 1 1 58D765D3
P 3420 2450
F 0 "J112" V 3530 2960 50  0000 C CNN
F 1 "ANALOG_OUT" V 3520 2450 50  0000 C CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x12_Pitch2.54mm" H 3420 2450 50  0001 C CNN
F 3 "" H 3420 2450 50  0001 C CNN
	1    3420 2450
	0    -1   1    0   
$EndComp
Wire Wire Line
	5820 4350 5820 4450
Wire Wire Line
	5820 4400 6570 4400
Connection ~ 5820 4400
Wire Wire Line
	6570 4600 6570 4800
Wire Wire Line
	5820 4000 7570 4000
Wire Wire Line
	6820 4000 6820 4250
Wire Wire Line
	5820 4050 5820 4000
Wire Wire Line
	7570 4000 7570 4100
Connection ~ 6820 4000
Wire Wire Line
	7570 4400 7570 4600
Connection ~ 7570 4500
Wire Wire Line
	7420 4500 7420 4800
Wire Wire Line
	7420 4800 6570 4800
Wire Wire Line
	7140 1600 7890 1600
Wire Wire Line
	7140 1700 7140 2000
Connection ~ 7340 1600
Wire Wire Line
	7340 2000 7340 1950
Connection ~ 7340 2000
Wire Wire Line
	9290 1480 9290 1930
Wire Wire Line
	9190 1930 9190 2080
Connection ~ 9290 1630
Connection ~ 9290 1780
Connection ~ 9290 1930
$Comp
L GNDA #PWR03
U 1 1 58D76D50
P 3070 2250
F 0 "#PWR03" H 3070 2000 50  0001 C CNN
F 1 "GNDA" H 3070 2100 50  0000 C CNN
F 2 "" H 3070 2250 50  0001 C CNN
F 3 "" H 3070 2250 50  0001 C CNN
	1    3070 2250
	1    0    0    1   
$EndComp
$Comp
L GNDA #PWR04
U 1 1 58D76DD7
P 3370 2250
F 0 "#PWR04" H 3370 2000 50  0001 C CNN
F 1 "GNDA" H 3370 2100 50  0000 C CNN
F 2 "" H 3370 2250 50  0001 C CNN
F 3 "" H 3370 2250 50  0001 C CNN
	1    3370 2250
	1    0    0    1   
$EndComp
$Comp
L GNDA #PWR05
U 1 1 58D77F82
P 3970 2250
F 0 "#PWR05" H 3970 2000 50  0001 C CNN
F 1 "GNDA" H 3970 2100 50  0000 C CNN
F 2 "" H 3970 2250 50  0001 C CNN
F 3 "" H 3970 2250 50  0001 C CNN
	1    3970 2250
	1    0    0    1   
$EndComp
$Comp
L GNDA #PWR06
U 1 1 58D78218
P 3670 2250
F 0 "#PWR06" H 3670 2000 50  0001 C CNN
F 1 "GNDA" H 3670 2100 50  0000 C CNN
F 2 "" H 3670 2250 50  0001 C CNN
F 3 "" H 3670 2250 50  0001 C CNN
	1    3670 2250
	1    0    0    1   
$EndComp
$Comp
L V+ #PWR07
U 1 1 58D7E8FC
P 5820 4000
F 0 "#PWR07" H 5820 3850 50  0001 C CNN
F 1 "V+" H 5820 4140 50  0000 C CNN
F 2 "" H 5820 4000 50  0000 C CNN
F 3 "" H 5820 4000 50  0000 C CNN
	1    5820 4000
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR08
U 1 1 58D7EC90
P 5820 4900
F 0 "#PWR08" H 5820 4750 50  0001 C CNN
F 1 "V-" H 5820 5040 50  0000 C CNN
F 2 "" H 5820 4900 50  0000 C CNN
F 3 "" H 5820 4900 50  0000 C CNN
	1    5820 4900
	-1   0    0    1   
$EndComp
$Comp
L GNDA #PWR09
U 1 1 58D7EF65
P 8020 4500
F 0 "#PWR09" H 8020 4250 50  0001 C CNN
F 1 "GNDA" H 8020 4350 50  0000 C CNN
F 2 "" H 8020 4500 50  0001 C CNN
F 3 "" H 8020 4500 50  0001 C CNN
	1    8020 4500
	1    0    0    -1  
$EndComp
Wire Wire Line
	5820 4900 7570 4900
Connection ~ 5820 4900
$Comp
L AD8622 U101
U 1 1 58D8019A
P 6870 4500
F 0 "U101" H 7070 4650 50  0000 L CNN
F 1 "AD8622" H 7070 4350 50  0000 L CNN
F 2 "Housings_SSOP:MSOP-8_3x3mm_Pitch0.65mm" H 6870 4500 50  0001 C CNN
F 3 "" H 6870 4500 50  0001 C CNN
	1    6870 4500
	1    0    0    -1  
$EndComp
Wire Wire Line
	6820 4900 6820 4750
$Comp
L V+ #PWR010
U 1 1 58D80748
P 7890 1600
F 0 "#PWR010" H 7890 1450 50  0001 C CNN
F 1 "V+" H 7890 1740 50  0000 C CNN
F 2 "" H 7890 1600 50  0000 C CNN
F 3 "" H 7890 1600 50  0000 C CNN
	1    7890 1600
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR011
U 1 1 58D807E6
P 7890 2000
F 0 "#PWR011" H 7890 1850 50  0001 C CNN
F 1 "V-" H 7890 2140 50  0000 C CNN
F 2 "" H 7890 2000 50  0000 C CNN
F 3 "" H 7890 2000 50  0000 C CNN
	1    7890 2000
	-1   0    0    1   
$EndComp
$Comp
L TEST_2P J101
U 1 1 58D80884
P 7740 1800
F 0 "J101" H 7740 1860 50  0000 C CNN
F 1 "VBATT" H 7740 1730 50  0000 C CNN
F 2 "Measurement_Points:Test_Point_2Pads" H 7740 1800 50  0001 C CNN
F 3 "" H 7740 1800 50  0001 C CNN
	1    7740 1800
	0    1    1    0   
$EndComp
Connection ~ 7740 1600
Connection ~ 7740 2000
Wire Wire Line
	7340 1650 7340 1600
$Comp
L AD8622 U101
U 2 1 58D81B44
P 6820 5700
F 0 "U101" H 7020 5850 50  0000 L CNN
F 1 "AD8622" H 7020 5550 50  0000 L CNN
F 2 "Housings_SSOP:MSOP-8_3x3mm_Pitch0.65mm" H 6820 5700 50  0001 C CNN
F 3 "" H 6820 5700 50  0001 C CNN
	2    6820 5700
	1    0    0    -1  
$EndComp
$Comp
L V+ #PWR012
U 1 1 58D81C02
P 6770 5450
F 0 "#PWR012" H 6770 5300 50  0001 C CNN
F 1 "V+" H 6770 5590 50  0000 C CNN
F 2 "" H 6770 5450 50  0000 C CNN
F 3 "" H 6770 5450 50  0000 C CNN
	1    6770 5450
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR013
U 1 1 58D81C79
P 6770 5950
F 0 "#PWR013" H 6770 5800 50  0001 C CNN
F 1 "V-" H 6770 6090 50  0000 C CNN
F 2 "" H 6770 5950 50  0000 C CNN
F 3 "" H 6770 5950 50  0000 C CNN
	1    6770 5950
	-1   0    0    1   
$EndComp
Wire Wire Line
	6520 5800 6320 5800
Wire Wire Line
	6320 5800 6320 6250
Wire Wire Line
	6320 6250 7520 6250
Wire Wire Line
	7520 6250 7520 5700
Wire Wire Line
	7520 5700 7120 5700
$Comp
L GNDA #PWR014
U 1 1 58D81D91
P 6520 5600
F 0 "#PWR014" H 6520 5350 50  0001 C CNN
F 1 "GNDA" H 6520 5450 50  0000 C CNN
F 2 "" H 6520 5600 50  0001 C CNN
F 3 "" H 6520 5600 50  0001 C CNN
	1    6520 5600
	0    1    1    0   
$EndComp
Text Notes 7270 5650 0    60   ~ 0
Unused
Wire Wire Line
	7170 4500 8020 4500
Connection ~ 7820 4500
Wire Wire Line
	7140 2000 7890 2000
Wire Wire Line
	5820 4900 5820 4750
Connection ~ 6820 4900
Connection ~ 7420 4500
$Comp
L PWR_FLAG #FLG015
U 1 1 58D93F01
P 7890 2000
F 0 "#FLG015" H 7890 2075 50  0001 C CNN
F 1 "PWR_FLAG" H 7690 2100 50  0001 C CNN
F 2 "" H 7890 2000 50  0001 C CNN
F 3 "" H 7890 2000 50  0001 C CNN
	1    7890 2000
	1    0    0    -1  
$EndComp
Wire Wire Line
	9290 1930 9190 1930
Wire Wire Line
	2170 2350 2640 2350
Wire Wire Line
	2640 2350 2640 2250
Wire Wire Line
	2640 2250 2870 2250
Wire Wire Line
	2170 2250 2590 2250
Wire Wire Line
	2590 2250 2590 2190
Wire Wire Line
	2590 2190 2970 2190
Wire Wire Line
	2970 2190 2970 2250
Wire Wire Line
	3340 2860 3340 2730
Wire Wire Line
	3340 2730 3130 2730
Wire Wire Line
	3130 2730 3130 2250
Wire Wire Line
	3130 2250 3170 2250
Wire Wire Line
	3450 2680 3450 2860
Wire Wire Line
	3450 2680 3230 2680
Wire Wire Line
	3230 2680 3230 2250
Wire Wire Line
	3230 2250 3270 2250
Wire Wire Line
	3470 2250 3470 1900
Wire Wire Line
	3570 2250 3570 1900
Wire Wire Line
	3770 2020 3770 2250
Wire Wire Line
	4320 2180 4070 2180
Wire Wire Line
	4070 2180 4070 2250
Wire Wire Line
	4070 2250 3870 2250
Wire Wire Line
	4250 2070 4320 2070
Wire Wire Line
	4250 2070 4250 2020
Wire Wire Line
	4250 2020 3770 2020
$EndSCHEMATC