EESchema Schematic File Version 2
LIBS:bmi-8ch-rescue
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:switches
LIBS:local-switches
LIBS:bmi-8ch-cache
EELAYER 25 0
EELAYER END
$Descr USLetter 11000 8500
encoding utf-8
Sheet 2 5
Title "Input Channel 0 & 1"
Date "2017-03-31"
Rev "AB"
Comp "Cusack Lab; Brain and Mind Institue, UWO"
Comment1 "Monadnock Systems"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L R R206
U 1 1 58D46589
P 1400 1800
F 0 "R206" V 1480 1800 50  0000 C CNN
F 1 "2M" V 1400 1800 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 1330 1800 50  0001 C CNN
F 3 "" H 1400 1800 50  0001 C CNN
	1    1400 1800
	1    0    0    -1  
$EndComp
$Comp
L R R207
U 1 1 58D465AD
P 1750 1800
F 0 "R207" V 1830 1800 50  0000 C CNN
F 1 "2M" V 1750 1800 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 1680 1800 50  0001 C CNN
F 3 "" H 1750 1800 50  0001 C CNN
	1    1750 1800
	1    0    0    -1  
$EndComp
$Comp
L R R201
U 1 1 58D465DB
P 1750 1200
F 0 "R201" V 1830 1200 50  0000 C CNN
F 1 "2M" V 1750 1200 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 1680 1200 50  0001 C CNN
F 3 "" H 1750 1200 50  0001 C CNN
	1    1750 1200
	1    0    0    -1  
$EndComp
$Comp
L CONN_01X02 J201
U 1 1 58D46616
P 900 1200
F 0 "J201" H 830 1040 50  0000 C CNN
F 1 "Sensor" V 1000 1200 50  0000 C CNN
F 2 "footprints:TerminalBlock_Pheonix_PT-5mm_2pol" H 900 1200 50  0001 C CNN
F 3 "" H 900 1200 50  0001 C CNN
	1    900  1200
	-1   0    0    -1  
$EndComp
$Comp
L C C206
U 1 1 58D47450
P 2200 1400
F 0 "C206" V 2250 1450 50  0000 L CNN
F 1 "0.1µF" V 2050 1300 50  0000 L CNN
F 2 "Capacitors_SMD:C_1206_HandSoldering" H 2238 1250 50  0001 C CNN
F 3 "" H 2200 1400 50  0001 C CNN
	1    2200 1400
	0    1    1    0   
$EndComp
$Comp
L C C208
U 1 1 58D47535
P 2200 1800
F 0 "C208" V 2150 1850 50  0000 L CNN
F 1 "0.1µF" V 2350 1700 50  0000 L CNN
F 2 "Capacitors_SMD:C_1206_HandSoldering" H 2238 1650 50  0001 C CNN
F 3 "" H 2200 1800 50  0001 C CNN
	1    2200 1800
	0    1    1    0   
$EndComp
Text Notes 1950 1000 0    60   ~ 0
Optional AC Coupling\n3dB down @ 0.04Hz
$Comp
L C C207
U 1 1 58D49933
P 6250 1750
F 0 "C207" H 6275 1850 50  0000 L CNN
F 1 "910pF" H 6150 1650 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 6288 1600 50  0001 C CNN
F 3 "" H 6250 1750 50  0001 C CNN
	1    6250 1750
	1    0    0    -1  
$EndComp
$Comp
L C C205
U 1 1 58D499AB
P 6600 1150
F 0 "C205" V 6550 1200 50  0000 L CNN
F 1 "9.1nF" V 6650 1200 50  0000 L CNN
F 2 "Resistors_SMD:R_0805_HandSoldering" H 6638 1000 50  0001 C CNN
F 3 "" H 6600 1150 50  0001 C CNN
	1    6600 1150
	0    1    1    0   
$EndComp
$Comp
L R R205
U 1 1 58D49A2E
P 6000 1600
F 0 "R205" V 6080 1600 50  0000 C CNN
F 1 "1.78M" V 6000 1600 39  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 5930 1600 50  0001 C CNN
F 3 "" H 6000 1600 50  0001 C CNN
	1    6000 1600
	0    1    1    0   
$EndComp
$Comp
L R R204
U 1 1 58D49ACD
P 5600 1600
F 0 "R204" V 5680 1600 50  0000 C CNN
F 1 "57.6k" V 5600 1600 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 5530 1600 50  0001 C CNN
F 3 "" H 5600 1600 50  0001 C CNN
	1    5600 1600
	0    1    1    0   
$EndComp
Text Notes 710  6030 0    87   ~ 0
Notes:\n\nR203, R213: 0.1%\nOther R: 1%\nC205, C206, C207, C208, C209, C210, C211, C212: 50V NP0\nBypass Caps: 50V X7R X5R
$Comp
L R R208
U 1 1 58D47410
P 2500 1800
F 0 "R208" V 2580 1800 50  0000 C CNN
F 1 "39M" V 2500 1800 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 2430 1800 50  0001 C CNN
F 3 "" H 2500 1800 50  0001 C CNN
	1    2500 1800
	1    0    0    -1  
$EndComp
$Comp
L R R202
U 1 1 58D47392
P 2500 1400
F 0 "R202" V 2580 1400 50  0000 C CNN
F 1 "39M" V 2500 1400 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 2430 1400 50  0001 C CNN
F 3 "" H 2500 1400 50  0001 C CNN
	1    2500 1400
	1    0    0    -1  
$EndComp
$Comp
L C C203
U 1 1 58D5F9F5
P 9900 1000
F 0 "C203" H 9925 1100 50  0000 L CNN
F 1 "0.1μF" H 9925 900 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 9938 850 50  0001 C CNN
F 3 "" H 9900 1000 50  0001 C CNN
	1    9900 1000
	1    0    0    -1  
$EndComp
Text Notes 5290 2600 0    60   ~ 0
Chebyshev (0.26dB)\nGain = 2V/V\n-3dB @ 195Hz\n-50dB @ 3.1kHz
$Comp
L AD8227 U201
U 1 1 58D55D88
P 3250 1600
F 0 "U201" H 3400 1725 50  0000 L CNN
F 1 "AD8227" H 3400 1475 50  0000 L CNN
F 2 "Housings_SSOP:MSOP-8_3x3mm_Pitch0.65mm" H 3350 1600 50  0001 C CNN
F 3 "" H 3350 1600 50  0001 C CNN
	1    3250 1600
	1    0    0    -1  
$EndComp
$Comp
L R_Small R203
U 1 1 58D5622C
P 2850 1600
F 0 "R203" V 2920 1520 50  0000 L CNN
F 1 "8k" V 2850 1580 31  0000 L CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" H 2850 1600 50  0001 C CNN
F 3 "" H 2850 1600 50  0001 C CNN
	1    2850 1600
	1    0    0    -1  
$EndComp
Text Notes 2750 1450 0    39   ~ 0
G=15
Wire Wire Line
	1100 1250 1400 1250
Wire Wire Line
	1100 1150 1100 1050
Wire Wire Line
	1100 1050 1750 1050
Connection ~ 1600 1050
Wire Wire Line
	1750 1350 1750 1650
Wire Wire Line
	1900 1500 1900 1800
Wire Notes Line
	2050 1100 2700 1100
Wire Wire Line
	6650 1800 6500 1800
Wire Wire Line
	6500 1800 6500 2200
Wire Wire Line
	7600 1150 7600 1810
Wire Wire Line
	7250 1700 9000 1700
Wire Wire Line
	5750 1600 5850 1600
Wire Wire Line
	6150 1600 6650 1600
Connection ~ 6250 1600
Wire Wire Line
	5800 1600 5800 1150
Wire Wire Line
	5800 1150 6450 1150
Connection ~ 5800 1600
Wire Wire Line
	7600 1150 6750 1150
Connection ~ 7600 1700
Wire Notes Line
	5250 1000 8350 1000
Wire Notes Line
	8350 1000 8350 2630
Wire Notes Line
	5250 1000 5250 2630
Wire Wire Line
	6500 2200 7750 2200
Wire Wire Line
	2350 1250 2750 1250
Wire Wire Line
	2350 1250 2350 1400
Connection ~ 2500 1250
Wire Wire Line
	2350 1800 2350 1950
Wire Wire Line
	2500 1550 2500 1650
Wire Wire Line
	2400 1600 2500 1600
Connection ~ 2500 1600
Wire Wire Line
	1900 1800 2050 1800
Wire Wire Line
	2350 1950 2750 1950
Connection ~ 2500 1950
Wire Notes Line
	2050 2100 2700 2100
Wire Notes Line
	2700 2100 2700 1100
Wire Notes Line
	2050 1100 2050 2100
Connection ~ 9900 1150
Connection ~ 9900 850 
Wire Notes Line
	5250 2630 8350 2630
Wire Wire Line
	3600 1900 3350 1900
Wire Wire Line
	2750 1250 2950 1400
Wire Wire Line
	2750 1950 2950 1800
Wire Wire Line
	3650 1600 5450 1600
Wire Wire Line
	2950 1500 2850 1500
Wire Wire Line
	2950 1700 2850 1700
Connection ~ 1750 1500
Wire Wire Line
	1750 1500 1900 1500
Text Notes 750  2840 0    39   ~ 0
For AC coupling: Populate as shown. Trim pot not required\n\nFor DC coupling: Replace C206,C208 with 5 kOhm resistors.\nR202,R208 may be omitted. Trim pot required. \nCut jumpers on pot footprint before installation.
Text Notes 2750 2350 0    39   ~ 0
CMRR: >95dB\nVoltage Noise Density @ G=15: <23.5nV/√Hz\nVoltage Noise (0.1-10Hz): < 0.8μV p-p\nSupply Current: <425μA
Text Notes 7080 2570 0    39   ~ 0
Offset: <125μV\nOffset Drift: <1.3μv/°C\nVoltage Noise Density: 12nV/√Hz\nVoltage Noise (0.1-10Hz): 0.2μV p-p\nSupply Current: <250μA
Text Notes 7650 1100 0    60   ~ 0
Antialias Filter
$Comp
L C C204
U 1 1 58D586D6
P 10150 1000
F 0 "C204" H 10175 1100 50  0000 L CNN
F 1 "10μF" H 10175 900 50  0000 L CNN
F 2 "Capacitors_SMD:C_1206_HandSoldering" H 10188 850 50  0001 C CNN
F 3 "" H 10150 1000 50  0001 C CNN
	1    10150 1000
	1    0    0    -1  
$EndComp
Wire Wire Line
	9420 1150 10150 1150
Wire Wire Line
	9420 850  10150 850 
Text Notes 6950 5250 0    60   ~ 0
Assumptions:\n - (Initial) DAQ is MCC USB-1208FS (available at BMI)\n     11-bit, max 6250 S/sec for each channel; sequential\n - Target Bandwidth: 195Hz\n - Sampling Rate 6240 S/s\n - Sensor resistance ~2MΩ\n - Respiration motion changes sensor resistance by < ±10%\n - Sensor resistance changes with handling; would require at\n     least per-subject trimming if DC coupled.
Text Notes 6860 6360 0    60   ~ 0
Open Questions:\n\n1. AC vs DC Coupling:\n  - AC; no trimming, better UX, better tempco, cheaper\n  - DC; captures all low-frequency signal that may be of interest\n\n2. Use chopper amps in signal path: Probably bad\n  - Lower total noise for *extremely* small bandwidths (<5Hz?)\n  - Lower offset (if DC coupled)\n
$Comp
L C C202
U 1 1 58D6122F
P 9650 1000
F 0 "C202" H 9675 1100 50  0000 L CNN
F 1 "0.1μF" H 9675 900 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 9688 850 50  0001 C CNN
F 3 "" H 9650 1000 50  0001 C CNN
	1    9650 1000
	1    0    0    -1  
$EndComp
Text Notes 3520 5380 0    60   ~ 0
Problems:\n\n  - USB-1208FS has fixed single-ended range of  ±10V\n    - Drop in upgrade to USB-1608FS (16bit and variable range)\n    - Mitigated initially by running on 18V via two 9V batteries.\n\n  - R202, R208, R212, R218; 39M only available in thick film. \n    - More (slightly) 1/f noise and ±5% accuracy.\n\n  - AC coupling isn't optional in this design. Rhodri keen\n     to try AC route first; add cost / complexity later if needed.
Text HLabel 9000 1700 2    60   Output ~ 0
Channel0
$Comp
L TEST_1P J203
U 1 1 58D71E95
P 4400 1600
F 0 "J203" H 4400 1870 50  0000 C CNN
F 1 "INA_OUT0" H 4400 1800 50  0000 C CNN
F 2 "Measurement_Points:Measurement_Point_Square-SMD-Pad_Small" H 4600 1600 50  0001 C CNN
F 3 "" H 4600 1600 50  0001 C CNN
	1    4400 1600
	1    0    0    -1  
$EndComp
$Comp
L TEST_1P J204
U 1 1 58D72214
P 8650 1700
F 0 "J204" H 8650 1970 50  0000 C CNN
F 1 "OUT0" H 8650 1900 50  0000 C CNN
F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 8850 1700 50  0001 C CNN
F 3 "" H 8850 1700 50  0001 C CNN
	1    8650 1700
	1    0    0    -1  
$EndComp
Connection ~ 4400 1600
Connection ~ 8650 1700
$Comp
L V+ #PWR017
U 1 1 58D823EA
P 3250 1300
F 0 "#PWR017" H 3250 1150 50  0001 C CNN
F 1 "V+" H 3250 1440 50  0000 C CNN
F 2 "" H 3250 1300 50  0000 C CNN
F 3 "" H 3250 1300 50  0000 C CNN
	1    3250 1300
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR018
U 1 1 58D82473
P 3250 1900
F 0 "#PWR018" H 3250 1750 50  0001 C CNN
F 1 "V-" H 3250 2040 50  0000 C CNN
F 2 "" H 3250 1900 50  0000 C CNN
F 3 "" H 3250 1900 50  0000 C CNN
	1    3250 1900
	-1   0    0    1   
$EndComp
$Comp
L GNDA #PWR019
U 1 1 58D82634
P 3600 1900
F 0 "#PWR019" H 3600 1650 50  0001 C CNN
F 1 "GNDA" H 3600 1750 50  0000 C CNN
F 2 "" H 3600 1900 50  0001 C CNN
F 3 "" H 3600 1900 50  0001 C CNN
	1    3600 1900
	0    -1   -1   0   
$EndComp
$Comp
L V+ #PWR020
U 1 1 58D8291B
P 1600 1050
F 0 "#PWR020" H 1600 900 50  0001 C CNN
F 1 "V+" H 1600 1190 50  0000 C CNN
F 2 "" H 1600 1050 50  0000 C CNN
F 3 "" H 1600 1050 50  0000 C CNN
	1    1600 1050
	1    0    0    -1  
$EndComp
$Comp
L V+ #PWR021
U 1 1 58D82B50
P 6900 1450
F 0 "#PWR021" H 6900 1300 50  0001 C CNN
F 1 "V+" H 6900 1590 50  0000 C CNN
F 2 "" H 6900 1450 50  0000 C CNN
F 3 "" H 6900 1450 50  0000 C CNN
	1    6900 1450
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR022
U 1 1 58D82BD9
P 6900 2000
F 0 "#PWR022" H 6900 1850 50  0001 C CNN
F 1 "V-" H 6900 2140 50  0000 C CNN
F 2 "" H 6900 2000 50  0000 C CNN
F 3 "" H 6900 2000 50  0000 C CNN
	1    6900 2000
	-1   0    0    1   
$EndComp
$Comp
L GNDA #PWR023
U 1 1 58D83F65
P 2400 1600
F 0 "#PWR023" H 2400 1350 50  0001 C CNN
F 1 "GNDA" H 2400 1450 50  0000 C CNN
F 2 "" H 2400 1600 50  0001 C CNN
F 3 "" H 2400 1600 50  0001 C CNN
	1    2400 1600
	0    1    1    0   
$EndComp
$Comp
L R R209
U 1 1 58D84917
P 7600 1960
F 0 "R209" V 7680 1960 50  0000 C CNN
F 1 "121k" V 7600 1960 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 7530 1960 50  0001 C CNN
F 3 "" H 7600 1960 50  0001 C CNN
	1    7600 1960
	1    0    0    -1  
$EndComp
$Comp
L R R210
U 1 1 58D849B6
P 7900 2200
F 0 "R210" V 7980 2200 50  0000 C CNN
F 1 "121k" V 7900 2200 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 7830 2200 50  0001 C CNN
F 3 "" H 7900 2200 50  0001 C CNN
	1    7900 2200
	0    1    1    0   
$EndComp
Wire Wire Line
	6900 2000 6900 1950
$Comp
L R R216
U 1 1 58D86C2D
P 1440 3780
F 0 "R216" V 1520 3780 50  0000 C CNN
F 1 "2M" V 1440 3780 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 1370 3780 50  0001 C CNN
F 3 "" H 1440 3780 50  0001 C CNN
	1    1440 3780
	1    0    0    -1  
$EndComp
$Comp
L R R217
U 1 1 58D86C33
P 1790 3780
F 0 "R217" V 1870 3780 50  0000 C CNN
F 1 "2M" V 1790 3780 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 1720 3780 50  0001 C CNN
F 3 "" H 1790 3780 50  0001 C CNN
	1    1790 3780
	1    0    0    -1  
$EndComp
$Comp
L R R211
U 1 1 58D86C39
P 1790 3180
F 0 "R211" V 1870 3180 50  0000 C CNN
F 1 "2M" V 1790 3180 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 1720 3180 50  0001 C CNN
F 3 "" H 1790 3180 50  0001 C CNN
	1    1790 3180
	1    0    0    -1  
$EndComp
$Comp
L CONN_01X02 J202
U 1 1 58D86C3F
P 940 3180
F 0 "J202" H 880 3020 50  0000 C CNN
F 1 "Sensor" V 1040 3180 50  0000 C CNN
F 2 "footprints:TerminalBlock_Pheonix_PT-5mm_2pol" H 940 3180 50  0001 C CNN
F 3 "" H 940 3180 50  0001 C CNN
	1    940  3180
	-1   0    0    -1  
$EndComp
$Comp
L C C210
U 1 1 58D86C48
P 2240 3380
F 0 "C210" V 2290 3430 50  0000 L CNN
F 1 "0.1µF" V 2090 3280 50  0000 L CNN
F 2 "Capacitors_SMD:C_1206_HandSoldering" H 2278 3230 50  0001 C CNN
F 3 "" H 2240 3380 50  0001 C CNN
	1    2240 3380
	0    1    1    0   
$EndComp
$Comp
L C C212
U 1 1 58D86C4E
P 2240 3780
F 0 "C212" V 2190 3830 50  0000 L CNN
F 1 "0.1µF" V 2390 3680 50  0000 L CNN
F 2 "Capacitors_SMD:C_1206_HandSoldering" H 2278 3630 50  0001 C CNN
F 3 "" H 2240 3780 50  0001 C CNN
	1    2240 3780
	0    1    1    0   
$EndComp
$Comp
L AD8622 U202
U 2 1 58D86C55
P 6990 3680
F 0 "U202" H 7190 3830 50  0000 L CNN
F 1 "AD8622" H 7090 3580 50  0000 L CNN
F 2 "Housings_SSOP:MSOP-8_3x3mm_Pitch0.65mm" H 6990 3680 50  0001 C CNN
F 3 "" H 6990 3680 50  0001 C CNN
	2    6990 3680
	1    0    0    -1  
$EndComp
$Comp
L C C211
U 1 1 58D86C5B
P 6290 3730
F 0 "C211" H 6315 3830 50  0000 L CNN
F 1 "910pF" H 6190 3630 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 6328 3580 50  0001 C CNN
F 3 "" H 6290 3730 50  0001 C CNN
	1    6290 3730
	1    0    0    -1  
$EndComp
$Comp
L C C209
U 1 1 58D86C61
P 6640 3130
F 0 "C209" V 6590 3180 50  0000 L CNN
F 1 "9.1nF" V 6690 3180 50  0000 L CNN
F 2 "Resistors_SMD:R_0805_HandSoldering" H 6678 2980 50  0001 C CNN
F 3 "" H 6640 3130 50  0001 C CNN
	1    6640 3130
	0    1    1    0   
$EndComp
$Comp
L R R215
U 1 1 58D86C67
P 6040 3580
F 0 "R215" V 6120 3580 50  0000 C CNN
F 1 "1.78M" V 6040 3580 39  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 5970 3580 50  0001 C CNN
F 3 "" H 6040 3580 50  0001 C CNN
	1    6040 3580
	0    1    1    0   
$EndComp
$Comp
L R R214
U 1 1 58D86C6D
P 5640 3580
F 0 "R214" V 5720 3580 50  0000 C CNN
F 1 "57.6k" V 5640 3580 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 5570 3580 50  0001 C CNN
F 3 "" H 5640 3580 50  0001 C CNN
	1    5640 3580
	0    1    1    0   
$EndComp
$Comp
L R R218
U 1 1 58D86C73
P 2540 3780
F 0 "R218" V 2620 3780 50  0000 C CNN
F 1 "39M" V 2540 3780 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 2470 3780 50  0001 C CNN
F 3 "" H 2540 3780 50  0001 C CNN
	1    2540 3780
	1    0    0    -1  
$EndComp
$Comp
L R R212
U 1 1 58D86C79
P 2540 3380
F 0 "R212" V 2620 3380 50  0000 C CNN
F 1 "39M" V 2540 3380 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 2470 3380 50  0001 C CNN
F 3 "" H 2540 3380 50  0001 C CNN
	1    2540 3380
	1    0    0    -1  
$EndComp
$Comp
L AD8227 U203
U 1 1 58D86C80
P 3290 3580
F 0 "U203" H 3440 3705 50  0000 L CNN
F 1 "AD8227" H 3440 3455 50  0000 L CNN
F 2 "Housings_SSOP:MSOP-8_3x3mm_Pitch0.65mm" H 3390 3580 50  0001 C CNN
F 3 "" H 3390 3580 50  0001 C CNN
	1    3290 3580
	1    0    0    -1  
$EndComp
$Comp
L R_Small R213
U 1 1 58D86C86
P 2890 3580
F 0 "R213" V 2960 3480 50  0000 L CNN
F 1 "8k" V 2890 3560 31  0000 L CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" H 2890 3580 50  0001 C CNN
F 3 "" H 2890 3580 50  0001 C CNN
	1    2890 3580
	1    0    0    -1  
$EndComp
Wire Wire Line
	1140 3230 1440 3230
Wire Wire Line
	1140 3130 1140 3030
Wire Wire Line
	1140 3030 1790 3030
Connection ~ 1640 3030
Wire Wire Line
	1790 3330 1790 3630
Wire Wire Line
	1940 3480 1940 3780
Wire Wire Line
	1440 3380 2090 3380
Wire Wire Line
	6690 3780 6540 3780
Wire Wire Line
	6540 3780 6540 4180
Wire Wire Line
	7640 3130 7640 3780
Wire Wire Line
	7290 3680 9040 3680
Wire Wire Line
	5790 3580 5890 3580
Wire Wire Line
	6190 3580 6690 3580
Connection ~ 6290 3580
Wire Wire Line
	5840 3580 5840 3130
Wire Wire Line
	5840 3130 6490 3130
Connection ~ 5840 3580
Wire Wire Line
	7640 3130 6790 3130
Connection ~ 7640 3680
Wire Wire Line
	6540 4180 7790 4180
Wire Wire Line
	2390 3230 2790 3230
Wire Wire Line
	2390 3230 2390 3380
Connection ~ 2540 3230
Wire Wire Line
	2390 3780 2390 3930
Wire Wire Line
	2540 3530 2540 3630
Wire Wire Line
	2440 3580 2540 3580
Connection ~ 2540 3580
Wire Wire Line
	1940 3780 2090 3780
Wire Wire Line
	2390 3930 2790 3930
Connection ~ 2540 3930
Wire Wire Line
	3640 3880 3390 3880
Wire Wire Line
	2790 3230 2990 3380
Wire Wire Line
	2790 3930 2990 3780
Wire Wire Line
	3690 3580 5490 3580
Wire Wire Line
	2990 3480 2890 3480
Wire Wire Line
	2990 3680 2890 3680
Connection ~ 1790 3480
Wire Wire Line
	1790 3480 1940 3480
Text HLabel 9040 3680 2    60   Output ~ 0
Channel1
$Comp
L TEST_1P J205
U 1 1 58D86CC9
P 4440 3580
F 0 "J205" H 4440 3850 50  0000 C CNN
F 1 "INA_OUT1" H 4440 3780 50  0000 C CNN
F 2 "Measurement_Points:Measurement_Point_Square-SMD-Pad_Small" H 4640 3580 50  0001 C CNN
F 3 "" H 4640 3580 50  0001 C CNN
	1    4440 3580
	1    0    0    -1  
$EndComp
$Comp
L TEST_1P J206
U 1 1 58D86CCF
P 8690 3680
F 0 "J206" H 8690 3950 50  0000 C CNN
F 1 "OUT1" H 8690 3880 50  0000 C CNN
F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 8890 3680 50  0001 C CNN
F 3 "" H 8890 3680 50  0001 C CNN
	1    8690 3680
	1    0    0    -1  
$EndComp
Connection ~ 4440 3580
Connection ~ 8690 3680
$Comp
L V+ #PWR024
U 1 1 58D86CD7
P 3290 3280
F 0 "#PWR024" H 3290 3130 50  0001 C CNN
F 1 "V+" H 3290 3420 50  0000 C CNN
F 2 "" H 3290 3280 50  0000 C CNN
F 3 "" H 3290 3280 50  0000 C CNN
	1    3290 3280
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR025
U 1 1 58D86CDD
P 3290 3880
F 0 "#PWR025" H 3290 3730 50  0001 C CNN
F 1 "V-" H 3290 4020 50  0000 C CNN
F 2 "" H 3290 3880 50  0000 C CNN
F 3 "" H 3290 3880 50  0000 C CNN
	1    3290 3880
	-1   0    0    1   
$EndComp
$Comp
L GNDA #PWR026
U 1 1 58D86CE3
P 3640 3880
F 0 "#PWR026" H 3640 3630 50  0001 C CNN
F 1 "GNDA" H 3640 3730 50  0000 C CNN
F 2 "" H 3640 3880 50  0001 C CNN
F 3 "" H 3640 3880 50  0001 C CNN
	1    3640 3880
	0    -1   -1   0   
$EndComp
$Comp
L V+ #PWR027
U 1 1 58D86CEF
P 1640 3030
F 0 "#PWR027" H 1640 2880 50  0001 C CNN
F 1 "V+" H 1640 3170 50  0000 C CNN
F 2 "" H 1640 3030 50  0000 C CNN
F 3 "" H 1640 3030 50  0000 C CNN
	1    1640 3030
	1    0    0    -1  
$EndComp
$Comp
L V+ #PWR028
U 1 1 58D86CF5
P 6940 3430
F 0 "#PWR028" H 6940 3280 50  0001 C CNN
F 1 "V+" H 6940 3570 50  0000 C CNN
F 2 "" H 6940 3430 50  0000 C CNN
F 3 "" H 6940 3430 50  0000 C CNN
	1    6940 3430
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR029
U 1 1 58D86CFB
P 6940 3980
F 0 "#PWR029" H 6940 3830 50  0001 C CNN
F 1 "V-" H 6940 4120 50  0000 C CNN
F 2 "" H 6940 3980 50  0000 C CNN
F 3 "" H 6940 3980 50  0000 C CNN
	1    6940 3980
	-1   0    0    1   
$EndComp
$Comp
L GNDA #PWR030
U 1 1 58D86D01
P 2440 3580
F 0 "#PWR030" H 2440 3330 50  0001 C CNN
F 1 "GNDA" H 2440 3430 50  0000 C CNN
F 2 "" H 2440 3580 50  0001 C CNN
F 3 "" H 2440 3580 50  0001 C CNN
	1    2440 3580
	0    1    1    0   
$EndComp
$Comp
L R R219
U 1 1 58D86D0D
P 7640 3930
F 0 "R219" V 7720 3930 50  0000 C CNN
F 1 "121k" V 7640 3930 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 7570 3930 50  0001 C CNN
F 3 "" H 7640 3930 50  0001 C CNN
	1    7640 3930
	1    0    0    -1  
$EndComp
$Comp
L R R220
U 1 1 58D86D13
P 7940 4180
F 0 "R220" V 8020 4180 50  0000 C CNN
F 1 "121k" V 7940 4180 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 7870 4180 50  0001 C CNN
F 3 "" H 7940 4180 50  0001 C CNN
	1    7940 4180
	0    1    1    0   
$EndComp
Wire Wire Line
	6940 3980 6940 3930
$Comp
L V+ #PWR031
U 1 1 58D8E38F
P 9900 850
F 0 "#PWR031" H 9900 700 50  0001 C CNN
F 1 "V+" H 9900 990 50  0000 C CNN
F 2 "" H 9900 850 50  0000 C CNN
F 3 "" H 9900 850 50  0000 C CNN
	1    9900 850 
	1    0    0    -1  
$EndComp
$Comp
L V- #PWR032
U 1 1 58D8E424
P 9900 1450
F 0 "#PWR032" H 9900 1300 50  0001 C CNN
F 1 "V-" H 9900 1590 50  0000 C CNN
F 2 "" H 9900 1450 50  0000 C CNN
F 3 "" H 9900 1450 50  0000 C CNN
	1    9900 1450
	-1   0    0    1   
$EndComp
$Comp
L AD8622 U202
U 1 1 58D497DC
P 6950 1700
F 0 "U202" H 7150 1850 50  0000 L CNN
F 1 "AD8622" H 7050 1600 50  0000 L CNN
F 2 "Housings_SSOP:MSOP-8_3x3mm_Pitch0.65mm" H 6950 1700 50  0001 C CNN
F 3 "" H 6950 1700 50  0001 C CNN
	1    6950 1700
	1    0    0    -1  
$EndComp
$Comp
L GNDA #PWR033
U 1 1 58D918AB
P 8050 2200
F 0 "#PWR033" H 8050 1950 50  0001 C CNN
F 1 "GNDA" H 8050 2050 50  0000 C CNN
F 2 "" H 8050 2200 50  0001 C CNN
F 3 "" H 8050 2200 50  0001 C CNN
	1    8050 2200
	0    -1   -1   0   
$EndComp
$Comp
L GNDA #PWR034
U 1 1 58D91F1A
P 8090 4180
F 0 "#PWR034" H 8090 3930 50  0001 C CNN
F 1 "GNDA" H 8090 4030 50  0000 C CNN
F 2 "" H 8090 4180 50  0001 C CNN
F 3 "" H 8090 4180 50  0001 C CNN
	1    8090 4180
	0    -1   -1   0   
$EndComp
$Comp
L GNDA #PWR035
U 1 1 58D92467
P 6290 3880
F 0 "#PWR035" H 6290 3630 50  0001 C CNN
F 1 "GNDA" H 6290 3730 50  0000 C CNN
F 2 "" H 6290 3880 50  0001 C CNN
F 3 "" H 6290 3880 50  0001 C CNN
	1    6290 3880
	1    0    0    -1  
$EndComp
$Comp
L GNDA #PWR036
U 1 1 58D924F3
P 6250 1900
F 0 "#PWR036" H 6250 1650 50  0001 C CNN
F 1 "GNDA" H 6250 1750 50  0000 C CNN
F 2 "" H 6250 1900 50  0001 C CNN
F 3 "" H 6250 1900 50  0001 C CNN
	1    6250 1900
	1    0    0    -1  
$EndComp
$Comp
L C C201
U 1 1 58D9CE79
P 9420 1000
F 0 "C201" H 9445 1100 50  0000 L CNN
F 1 "0.1μF" H 9445 900 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 9458 850 50  0001 C CNN
F 3 "" H 9420 1000 50  0001 C CNN
	1    9420 1000
	1    0    0    -1  
$EndComp
Connection ~ 9650 1150
Connection ~ 9650 850 
Wire Wire Line
	1400 1250 1400 1650
Wire Wire Line
	1440 3230 1440 3630
Connection ~ 1440 3380
Wire Wire Line
	2050 1400 1400 1400
Connection ~ 1400 1400
$Comp
L GNDA #PWR037
U 1 1 58DDAD59
P 9420 1150
F 0 "#PWR037" H 9420 900 50  0001 C CNN
F 1 "GNDA" H 9420 1000 50  0000 C CNN
F 2 "" H 9420 1150 50  0001 C CNN
F 3 "" H 9420 1150 50  0001 C CNN
	1    9420 1150
	0    1    1    0   
$EndComp
$Comp
L C C215
U 1 1 58DDB236
P 9900 1300
F 0 "C215" H 9925 1400 50  0000 L CNN
F 1 "0.1μF" H 9925 1200 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 9938 1150 50  0001 C CNN
F 3 "" H 9900 1300 50  0001 C CNN
	1    9900 1300
	1    0    0    -1  
$EndComp
$Comp
L C C214
U 1 1 58DDB23C
P 9650 1300
F 0 "C214" H 9675 1400 50  0000 L CNN
F 1 "0.1μF" H 9675 1200 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 9688 1150 50  0001 C CNN
F 3 "" H 9650 1300 50  0001 C CNN
	1    9650 1300
	1    0    0    -1  
$EndComp
$Comp
L C C213
U 1 1 58DDB242
P 9420 1300
F 0 "C213" H 9445 1400 50  0000 L CNN
F 1 "0.1μF" H 9445 1200 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 9458 1150 50  0001 C CNN
F 3 "" H 9420 1300 50  0001 C CNN
	1    9420 1300
	1    0    0    -1  
$EndComp
$Comp
L C C216
U 1 1 58DDB480
P 10150 1300
F 0 "C216" H 10175 1400 50  0000 L CNN
F 1 "10μF" H 10175 1200 50  0000 L CNN
F 2 "Capacitors_SMD:C_1206_HandSoldering" H 10188 1150 50  0001 C CNN
F 3 "" H 10150 1300 50  0001 C CNN
	1    10150 1300
	1    0    0    -1  
$EndComp
Connection ~ 10150 1150
Wire Wire Line
	9420 1450 10150 1450
Connection ~ 9900 1450
Connection ~ 9650 1450
Connection ~ 7640 4180
Wire Wire Line
	7640 4080 7640 4180
Connection ~ 7600 2200
Wire Wire Line
	7600 2110 7600 2200
$Comp
L V- #PWR038
U 1 1 58E3F3FF
P 1580 2330
F 0 "#PWR038" H 1580 2180 50  0001 C CNN
F 1 "V-" H 1580 2470 50  0000 C CNN
F 2 "" H 1580 2330 50  0000 C CNN
F 3 "" H 1580 2330 50  0000 C CNN
	1    1580 2330
	-1   0    0    1   
$EndComp
$Comp
L POT_TRIM RV201
U 1 1 58E3F405
P 1580 2090
F 0 "RV201" V 1500 2090 50  0000 C CNN
F 1 "100k" V 1580 2090 50  0000 C CNN
F 2 "footprints:Potentiometer_Trimmer_Bourns_3296W_w_Bypass" H 1580 2090 50  0001 C CNN
F 3 "" H 1580 2090 50  0001 C CNN
	1    1580 2090
	0    1    1    0   
$EndComp
Wire Wire Line
	1580 2330 1580 2240
Wire Wire Line
	1430 2090 1400 2090
Wire Wire Line
	1730 2090 1750 2090
$Comp
L V- #PWR039
U 1 1 58E47292
P 1620 4310
F 0 "#PWR039" H 1620 4160 50  0001 C CNN
F 1 "V-" H 1620 4450 50  0000 C CNN
F 2 "" H 1620 4310 50  0000 C CNN
F 3 "" H 1620 4310 50  0000 C CNN
	1    1620 4310
	-1   0    0    1   
$EndComp
$Comp
L POT_TRIM RV202
U 1 1 58E47298
P 1620 4070
F 0 "RV202" V 1540 4070 50  0000 C CNN
F 1 "100k" V 1620 4070 50  0000 C CNN
F 2 "footprints:Potentiometer_Trimmer_Bourns_3296W_w_Bypass" H 1620 4070 50  0001 C CNN
F 3 "" H 1620 4070 50  0001 C CNN
	1    1620 4070
	0    1    1    0   
$EndComp
Wire Wire Line
	1440 3930 1440 4070
Wire Wire Line
	1620 4310 1620 4220
Wire Wire Line
	1440 4070 1470 4070
Wire Wire Line
	1790 4070 1790 3930
Wire Wire Line
	1770 4070 1790 4070
Wire Wire Line
	1400 2090 1400 1950
Wire Wire Line
	1750 2090 1750 1950
Text Notes 450  7910 0    60   ~ 0
   Copyright 2017 University of Western Ontario\n\n   Licensed under the Apache License, Version 2.0 (the "License");\n   you may not use this file except in compliance with the License.\n   You may obtain a copy of the License at\n\n       http://www.apache.org/licenses/LICENSE-2.0\n\n   Unless required by applicable law or agreed to in writing, software\n   distributed under the License is distributed on an "AS IS" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n   See the License for the specific language governing permissions and\n   limitations under the License.
Wire Notes Line
	1330 1970 1810 1970
Wire Notes Line
	1810 1970 1810 2190
Wire Notes Line
	1810 2190 1330 2190
Wire Notes Line
	1330 2190 1330 1970
Wire Notes Line
	1810 2100 1920 2100
Wire Notes Line
	1920 2100 1920 2010
Wire Notes Line
	1920 2010 2050 2010
$EndSCHEMATC