EESchema Schematic File Version 4
LIBS:R-2R DAC-cache
EELAYER 26 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Device:R R2
U 1 1 5B0A220F
P 3800 4050
F 0 "R2" H 3870 4096 50  0000 L CNN
F 1 "2k" H 3870 4005 50  0000 L CNN
F 2 "" V 3730 4050 50  0001 C CNN
F 3 "~" H 3800 4050 50  0001 C CNN
	1    3800 4050
	1    0    0    -1  
$EndComp
$Comp
L Device:R R1
U 1 1 5B0A2246
P 3500 4050
F 0 "R1" H 3570 4096 50  0000 L CNN
F 1 "2k" H 3570 4005 50  0000 L CNN
F 2 "" V 3430 4050 50  0001 C CNN
F 3 "~" H 3500 4050 50  0001 C CNN
	1    3500 4050
	1    0    0    -1  
$EndComp
$Comp
L Device:R R4
U 1 1 5B0A2290
P 4350 4050
F 0 "R4" H 4420 4096 50  0000 L CNN
F 1 "2k" H 4420 4005 50  0000 L CNN
F 2 "" V 4280 4050 50  0001 C CNN
F 3 "~" H 4350 4050 50  0001 C CNN
	1    4350 4050
	1    0    0    -1  
$EndComp
$Comp
L Device:R R6
U 1 1 5B0A22D3
P 4950 4050
F 0 "R6" H 5020 4096 50  0000 L CNN
F 1 "2k" H 5020 4005 50  0000 L CNN
F 2 "" V 4880 4050 50  0001 C CNN
F 3 "~" H 4950 4050 50  0001 C CNN
	1    4950 4050
	1    0    0    -1  
$EndComp
$Comp
L Device:R R8
U 1 1 5B0A230B
P 5550 4050
F 0 "R8" H 5620 4096 50  0000 L CNN
F 1 "2k" H 5620 4005 50  0000 L CNN
F 2 "" V 5480 4050 50  0001 C CNN
F 3 "~" H 5550 4050 50  0001 C CNN
	1    5550 4050
	1    0    0    -1  
$EndComp
$Comp
L Device:R R9
U 1 1 5B0A236E
P 5800 4050
F 0 "R9" H 5870 4096 50  0000 L CNN
F 1 "2k" H 5870 4005 50  0000 L CNN
F 2 "" V 5730 4050 50  0001 C CNN
F 3 "~" H 5800 4050 50  0001 C CNN
	1    5800 4050
	1    0    0    -1  
$EndComp
$Comp
L Device:R R3
U 1 1 5B0A23C4
P 4100 3600
F 0 "R3" V 3893 3600 50  0000 C CNN
F 1 "1k" V 3984 3600 50  0000 C CNN
F 2 "" V 4030 3600 50  0001 C CNN
F 3 "~" H 4100 3600 50  0001 C CNN
	1    4100 3600
	0    1    1    0   
$EndComp
$Comp
L Device:R R5
U 1 1 5B0A24D0
P 4650 3600
F 0 "R5" V 4443 3600 50  0000 C CNN
F 1 "1k" V 4534 3600 50  0000 C CNN
F 2 "" V 4580 3600 50  0001 C CNN
F 3 "~" H 4650 3600 50  0001 C CNN
	1    4650 3600
	0    1    1    0   
$EndComp
$Comp
L Device:R R7
U 1 1 5B0A2532
P 5250 3600
F 0 "R7" V 5043 3600 50  0000 C CNN
F 1 "1k" V 5134 3600 50  0000 C CNN
F 2 "" V 5180 3600 50  0001 C CNN
F 3 "~" H 5250 3600 50  0001 C CNN
	1    5250 3600
	0    1    1    0   
$EndComp
$Comp
L pspice:VSOURCE V1
U 1 1 5B0A25BF
P 3800 4850
F 0 "V1" H 4028 4896 50  0000 L CNN
F 1 "VSOURCE" H 4028 4805 50  0000 L CNN
F 2 "" H 3800 4850 50  0001 C CNN
F 3 "" H 3800 4850 50  0001 C CNN
F 4 "V" H 3800 4850 50  0001 C CNN "Spice_Primitive"
F 5 "dc 0" H 3800 4850 50  0001 C CNN "Spice_Model"
F 6 "Y" H 3800 4850 50  0001 C CNN "Spice_Netlist_Enabled"
	1    3800 4850
	1    0    0    -1  
$EndComp
$Comp
L pspice:VSOURCE V2
U 1 1 5B0A2607
P 4350 4900
F 0 "V2" H 4578 4946 50  0000 L CNN
F 1 "VSOURCE" H 4578 4855 50  0000 L CNN
F 2 "" H 4350 4900 50  0001 C CNN
F 3 "" H 4350 4900 50  0001 C CNN
F 4 "V" H 4350 4900 50  0001 C CNN "Spice_Primitive"
F 5 "dc 0" H 4350 4900 50  0001 C CNN "Spice_Model"
F 6 "Y" H 4350 4900 50  0001 C CNN "Spice_Netlist_Enabled"
	1    4350 4900
	1    0    0    -1  
$EndComp
$Comp
L pspice:VSOURCE V3
U 1 1 5B0A2655
P 4950 4900
F 0 "V3" H 5178 4946 50  0000 L CNN
F 1 "VSOURCE" H 5178 4855 50  0000 L CNN
F 2 "" H 4950 4900 50  0001 C CNN
F 3 "" H 4950 4900 50  0001 C CNN
F 4 "V" H 4950 4900 50  0001 C CNN "Spice_Primitive"
F 5 "dc 0" H 4950 4900 50  0001 C CNN "Spice_Model"
F 6 "Y" H 4950 4900 50  0001 C CNN "Spice_Netlist_Enabled"
	1    4950 4900
	1    0    0    -1  
$EndComp
$Comp
L pspice:VSOURCE V4
U 1 1 5B0A26A3
P 5550 4900
F 0 "V4" H 5778 4946 50  0000 L CNN
F 1 "VSOURCE" H 5778 4855 50  0000 L CNN
F 2 "" H 5550 4900 50  0001 C CNN
F 3 "" H 5550 4900 50  0001 C CNN
F 4 "V" H 5550 4900 50  0001 C CNN "Spice_Primitive"
F 5 "dc 5" H 5550 4900 50  0001 C CNN "Spice_Model"
F 6 "Y" H 5550 4900 50  0001 C CNN "Spice_Netlist_Enabled"
	1    5550 4900
	1    0    0    -1  
$EndComp
Wire Wire Line
	3800 5150 3800 5400
Wire Wire Line
	3800 5400 4350 5400
Wire Wire Line
	5550 5400 5550 5200
Wire Wire Line
	4950 5200 4950 5400
Connection ~ 4950 5400
Wire Wire Line
	4950 5400 5550 5400
Wire Wire Line
	4350 5200 4350 5400
Connection ~ 4350 5400
Wire Wire Line
	4350 5400 4700 5400
Wire Wire Line
	3800 4550 3800 4200
Wire Wire Line
	3800 3900 3800 3600
Wire Wire Line
	3800 3600 3950 3600
Wire Wire Line
	4250 3600 4350 3600
Wire Wire Line
	4350 3600 4350 3900
Wire Wire Line
	4350 3600 4500 3600
Connection ~ 4350 3600
Wire Wire Line
	4800 3600 4950 3600
Wire Wire Line
	4950 3900 4950 3600
Connection ~ 4950 3600
Wire Wire Line
	4950 3600 5100 3600
Wire Wire Line
	4350 4600 4350 4200
Wire Wire Line
	4950 4600 4950 4200
Wire Wire Line
	5550 4600 5550 4200
Wire Wire Line
	5550 3900 5550 3600
Wire Wire Line
	5550 3600 5400 3600
$Comp
L Amplifier_Operational:AD8620 U1
U 1 1 5B0A3185
P 6750 3500
F 0 "U1" H 6750 3022 50  0000 C CNN
F 1 "AD8620" H 6750 3113 50  0000 C CNN
F 2 "" H 6750 3500 50  0001 C CNN
F 3 "http://www.analog.com/media/en/technical-documentation/data-sheets/AD8610_8620.pdf" H 6750 3500 50  0001 C CNN
	1    6750 3500
	1    0    0    1   
$EndComp
$Comp
L power:GND #PWR02
U 1 1 5B0A33C5
P 4700 5650
F 0 "#PWR02" H 4700 5400 50  0001 C CNN
F 1 "GND" H 4705 5477 50  0000 C CNN
F 2 "" H 4700 5650 50  0001 C CNN
F 3 "" H 4700 5650 50  0001 C CNN
	1    4700 5650
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR01
U 1 1 5B0A3401
P 3100 4300
F 0 "#PWR01" H 3100 4050 50  0001 C CNN
F 1 "GND" H 3105 4127 50  0000 C CNN
F 2 "" H 3100 4300 50  0001 C CNN
F 3 "" H 3100 4300 50  0001 C CNN
	1    3100 4300
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR03
U 1 1 5B0A3436
P 5800 4300
F 0 "#PWR03" H 5800 4050 50  0001 C CNN
F 1 "GND" H 5805 4127 50  0000 C CNN
F 2 "" H 5800 4300 50  0001 C CNN
F 3 "" H 5800 4300 50  0001 C CNN
	1    5800 4300
	1    0    0    -1  
$EndComp
Connection ~ 5550 3600
Wire Wire Line
	3800 3600 3500 3600
Wire Wire Line
	3500 3600 3500 3900
Connection ~ 3800 3600
Wire Wire Line
	3500 4200 3100 4200
Wire Wire Line
	3100 4200 3100 4300
Wire Wire Line
	5800 4300 5800 4200
Wire Wire Line
	5800 3900 5800 3600
Wire Wire Line
	5800 3600 5550 3600
Wire Wire Line
	6450 3400 6200 3400
Wire Wire Line
	6200 3400 6200 2900
Wire Wire Line
	7250 2900 7250 3200
Wire Wire Line
	7250 3500 7050 3500
Wire Wire Line
	4700 5650 4700 5400
Connection ~ 4700 5400
Wire Wire Line
	4700 5400 4950 5400
$Comp
L power:PWR_FLAG #FLG0101
U 1 1 5B0A5E2D
P 6150 4300
F 0 "#FLG0101" H 6150 4375 50  0001 C CNN
F 1 "PWR_FLAG" H 6150 4474 50  0000 C CNN
F 2 "" H 6150 4300 50  0001 C CNN
F 3 "~" H 6150 4300 50  0001 C CNN
	1    6150 4300
	1    0    0    -1  
$EndComp
Wire Wire Line
	6150 4300 5800 4300
Connection ~ 5800 4300
$Comp
L pspice:VSOURCE V5
U 1 1 5B0C8ED6
P 8300 3100
F 0 "V5" H 8528 3146 50  0000 L CNN
F 1 "VSOURCE" H 8528 3055 50  0000 L CNN
F 2 "" H 8300 3100 50  0001 C CNN
F 3 "" H 8300 3100 50  0001 C CNN
F 4 "V" H 8300 3100 50  0001 C CNN "Spice_Primitive"
F 5 "dc 10" H 8300 3100 50  0001 C CNN "Spice_Model"
F 6 "Y" H 8300 3100 50  0001 C CNN "Spice_Netlist_Enabled"
	1    8300 3100
	1    0    0    -1  
$EndComp
$Comp
L pspice:VSOURCE V6
U 1 1 5B0C8F5F
P 8300 4100
F 0 "V6" H 8528 4146 50  0000 L CNN
F 1 "VSOURCE" H 8528 4055 50  0000 L CNN
F 2 "" H 8300 4100 50  0001 C CNN
F 3 "" H 8300 4100 50  0001 C CNN
F 4 "V" H 8300 4100 50  0001 C CNN "Spice_Primitive"
F 5 "dc 10" H 8300 4100 50  0001 C CNN "Spice_Model"
F 6 "Y" H 8300 4100 50  0001 C CNN "Spice_Netlist_Enabled"
	1    8300 4100
	1    0    0    -1  
$EndComp
$Comp
L power:VDD #PWR06
U 1 1 5B0C9017
P 8300 2600
F 0 "#PWR06" H 8300 2450 50  0001 C CNN
F 1 "VDD" H 8317 2773 50  0000 C CNN
F 2 "" H 8300 2600 50  0001 C CNN
F 3 "" H 8300 2600 50  0001 C CNN
	1    8300 2600
	1    0    0    -1  
$EndComp
$Comp
L power:VSS #PWR07
U 1 1 5B0C90B6
P 8450 4800
F 0 "#PWR07" H 8450 4650 50  0001 C CNN
F 1 "VSS" H 8467 4973 50  0000 C CNN
F 2 "" H 8450 4800 50  0001 C CNN
F 3 "" H 8450 4800 50  0001 C CNN
	1    8450 4800
	1    0    0    -1  
$EndComp
Wire Wire Line
	8450 4800 8300 4800
Wire Wire Line
	8300 4800 8300 4400
Wire Wire Line
	8300 3800 8300 3650
Wire Wire Line
	8300 2800 8300 2600
$Comp
L power:GND #PWR08
U 1 1 5B0CADF6
P 8800 3750
F 0 "#PWR08" H 8800 3500 50  0001 C CNN
F 1 "GND" H 8805 3577 50  0000 C CNN
F 2 "" H 8800 3750 50  0001 C CNN
F 3 "" H 8800 3750 50  0001 C CNN
	1    8800 3750
	1    0    0    -1  
$EndComp
Wire Wire Line
	8800 3750 8800 3650
Wire Wire Line
	8800 3650 8300 3650
Connection ~ 8300 3650
Wire Wire Line
	8300 3650 8300 3400
Text GLabel 7750 3350 0    50   Input ~ 0
out
Wire Wire Line
	7750 3350 7750 3200
Wire Wire Line
	7750 3200 7250 3200
Connection ~ 7250 3200
Wire Wire Line
	7250 3200 7250 3500
$Comp
L Device:R R10
U 1 1 5B0CDF7D
P 6650 2900
F 0 "R10" V 6443 2900 50  0000 C CNN
F 1 "2k" V 6534 2900 50  0000 C CNN
F 2 "" V 6580 2900 50  0001 C CNN
F 3 "~" H 6650 2900 50  0001 C CNN
	1    6650 2900
	0    1    1    0   
$EndComp
Wire Wire Line
	6800 2900 7250 2900
Wire Wire Line
	6500 2900 6200 2900
Wire Wire Line
	5800 3600 5800 3400
Wire Wire Line
	5800 3400 6200 3400
Connection ~ 5800 3600
Connection ~ 6200 3400
$Comp
L power:GND #PWR0101
U 1 1 5B0D2212
P 6200 3800
F 0 "#PWR0101" H 6200 3550 50  0001 C CNN
F 1 "GND" H 6205 3627 50  0000 C CNN
F 2 "" H 6200 3800 50  0001 C CNN
F 3 "" H 6200 3800 50  0001 C CNN
	1    6200 3800
	1    0    0    -1  
$EndComp
Wire Wire Line
	6200 3800 6200 3600
Wire Wire Line
	6200 3600 6450 3600
Text Notes 7050 5450 0    50   ~ 0
.tran .25m 30m
$EndSCHEMATC