* Z:\home\khalils\Downloads\files\data\raw_asc\321303fcad85_howland-ADA4096-tran.asc
* Generated by LTspice 26.0.1 for Windows.
* Electrode
* Total area: 15x 0201s (.45 x0.9) + 1x QFN16 (3x3) = 15 mm2\nI think this version is too slow!
* Library below included based on ModelFile attribute of instance XU5, XU1, XU2, XU3 (C:\users\khalils\AppData\Local\LTspice\lib\sym\OpAmps\ADA4096.asy)
XU1 N010 N007 v+ v- N008 ADA4096 ;pnba In+)In-)V+)V-)OUT
XU2 N004 N011 v+ v- N012 ADA4096 ;pnba In+)In-)V+)V-)OUT
V2 v- 0 -15V
XU5 N003 N001 v+ v- N002 ADA4096 ;pnba In+)In-)V+)V-)OUT
R5 N003 vin 10k tol=0.05
XU3 N005 N009 v+ v- N006 ADA4096 ;pnba In+)In-)V+)V-)OUT
R4 N009 N011 2.86k
V5 2v5 0 +2.5
R9 N001 2v5 10k tol=0.05
R6 N011 N012 10k tol=0.05
R10 N004 N003 9K tol=0.05
R3 N006 N009 10k
R11 N002 N001 10k tol=0.05
R15 N008 N007 10k tol=0.05
V1 v+ 0 +15V
R13 N010 N012 10k tol=0.05
R8 N004 N005 100 tol=1
R2 N005 0 1Meg
V3 vin 0 PWL(0 2.5 100u 2.5 101u {Vcmd} 200u {Vcmd} 201u 0 300u 0 301u 2.5)
V4 3v3 0 +3.3
R12 N007 N006 10k tol=0.05
R16 N008 Imeas 10k tol=1
R14 2v5 N010 10k tol=0.05
R1 N002 N004 1K tol=0.05
C1 N013 0 300nF
R7 N005 N013 1k
R17 Imeas 0 10k tol=1
.tran 0.5m
.step param Vcmd 0.1 5 1
.inc OPA1678.cir
.lib ADA4096.lib
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 4076 1332
WIRE 368 -176 224 -176
WIRE 640 -176 448 -176
WIRE 368 48 368 0
WIRE -176 64 -176 0
WIRE -80 64 -176 64
WIRE 224 64 224 -176
WIRE 224 64 0 64
WIRE 336 64 224 64
WIRE 640 80 640 -176
WIRE 640 80 400 80
WIRE 336 96 320 96
WIRE 928 112 928 48
WIRE 1024 112 1024 48
WIRE 1120 112 1120 48
WIRE 1216 112 1216 48
WIRE 1312 112 1312 48
WIRE -80 128 -128 128
WIRE 224 128 0 128
WIRE 320 128 320 96
WIRE 320 128 224 128
WIRE 368 160 368 112
WIRE 928 240 928 192
WIRE 1024 240 1024 192
WIRE 1120 240 1120 192
WIRE 1216 240 1216 192
WIRE 1312 240 1312 192
WIRE 224 368 224 128
WIRE 368 368 224 368
WIRE 480 368 448 368
WIRE 544 368 480 368
WIRE 640 368 640 80
WIRE 640 368 624 368
WIRE 480 448 480 368
WIRE 592 448 480 448
WIRE 944 448 816 448
WIRE 1136 464 1008 464
WIRE 1248 464 1136 464
WIRE 1360 464 1328 464
WIRE 1456 464 1360 464
WIRE 1584 464 1536 464
WIRE 944 480 912 480
WIRE 1136 480 1136 464
WIRE 912 576 912 480
WIRE 1136 576 1136 560
WIRE 1136 576 912 576
WIRE 480 592 480 448
WIRE 1136 592 1136 576
WIRE 1360 608 1360 464
WIRE 1376 608 1360 608
WIRE 1584 624 1584 464
WIRE 1584 624 1440 624
WIRE 1936 624 1584 624
WIRE 1376 640 1360 640
WIRE 1936 640 1936 624
WIRE 1136 688 1136 672
WIRE 1136 688 912 688
WIRE 1136 704 1136 688
WIRE 1936 736 1936 720
WIRE 2048 736 1936 736
WIRE 1936 768 1936 736
WIRE 912 784 912 688
WIRE 944 784 912 784
WIRE 1136 800 1136 784
WIRE 1136 800 1008 800
WIRE 1232 800 1136 800
WIRE 1360 800 1360 640
WIRE 1360 800 1312 800
WIRE 1472 800 1360 800
WIRE 1600 800 1552 800
WIRE 480 816 480 672
WIRE 592 816 816 448
WIRE 592 816 480 816
WIRE 816 816 592 448
WIRE 944 816 816 816
WIRE 1936 880 1936 848
WIRE 480 896 480 816
WIRE 608 896 480 896
WIRE 608 912 608 896
WIRE 480 1008 480 896
WIRE 608 1056 608 992
WIRE 480 1216 480 1088
WIRE 608 1216 608 1120
WIRE 608 1216 480 1216
WIRE 480 1312 480 1216
IOPIN -128 128 In
IOPIN 1120 48 BiDir
IOPIN 1216 48 BiDir
IOPIN 1312 48 BiDir
IOPIN 1024 48 BiDir
IOPIN 928 48 BiDir
IOPIN -176 0 BiDir
IOPIN 368 0 BiDir
IOPIN 368 160 BiDir
IOPIN 1600 800 BiDir
IOPIN 976 496 BiDir
IOPIN 1408 592 BiDir
IOPIN 976 768 BiDir
IOPIN 976 432 BiDir
IOPIN 1408 656 BiDir
IOPIN 976 832 BiDir
IOPIN 2048 736 Out
SYMBOL res 1920 624 R0
SYMATTR InstName R16
SYMATTR Value 10k
SYMATTR SpiceLine tol=1
SYMBOL res 464 992 R0
SYMATTR InstName R2
SYMATTR Value 1Meg
SYMBOL res 1120 464 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL voltage 1312 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PWL(0 2.5 100u 2.5 101u {Vcmd} 200u {Vcmd} 201u 0 300u 0 301u 2.5)
SYMBOL res 1552 448 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R15
SYMATTR Value 10k
SYMATTR SpiceLine tol=0.05
SYMBOL res 16 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMATTR SpiceLine tol=0.05
SYMBOL res 16 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 10k
SYMATTR SpiceLine tol=0.05
SYMBOL voltage 1216 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value -15V
SYMBOL res 640 352 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1K
SYMATTR SpiceLine tol=0.05
SYMBOL res 464 -192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 10k
SYMATTR SpiceLine tol=0.05
SYMBOL res 1120 576 R0
SYMATTR InstName R4
SYMATTR Value 2.86k
SYMBOL Opamps\\ADA4096 1408 560 R0
SYMATTR InstName U1
SYMBOL res 592 896 R0
SYMATTR InstName R7
SYMATTR Value 1k
SYMBOL res 1344 448 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R12
SYMATTR Value 10k
SYMATTR SpiceLine tol=0.05
SYMBOL Opamps\\ADA4096 976 736 R0
SYMATTR InstName U2
SYMBOL res 1568 784 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R14
SYMATTR Value 10k
SYMATTR SpiceLine tol=0.05
SYMBOL voltage 1120 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value +15V
SYMBOL voltage 1024 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value +3.3
SYMBOL res 1328 784 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R13
SYMATTR Value 10k
SYMATTR SpiceLine tol=0.05
SYMBOL Opamps\\ADA4096 368 16 R0
SYMATTR InstName U5
SYMBOL res 464 576 R0
SYMATTR InstName R8
SYMATTR Value 100
SYMATTR SpiceLine tol=1
SYMBOL res 1120 688 R0
SYMATTR InstName R6
SYMATTR Value 10k
SYMATTR SpiceLine tol=0.05
SYMBOL voltage 928 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V5
SYMATTR Value +2.5
SYMBOL res 464 352 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 9K
SYMATTR SpiceLine tol=0.05
SYMBOL Opamps\\ADA4096 976 528 M180
SYMATTR InstName U3
SYMBOL res 1920 752 R0
SYMATTR InstName R17
SYMATTR Value 10k
SYMATTR SpiceLine tol=1
SYMBOL cap 592 1056 R0
SYMATTR InstName C1
SYMATTR Value 300nF
FLAG -128 128 vin
FLAG 1120 48 v+
FLAG 1216 48 v-
FLAG 1216 240 0
FLAG 1120 240 0
FLAG 1312 240 0
FLAG 1312 48 vin
FLAG 480 1312 0
FLAG 1024 240 0
FLAG 1024 48 3v3
FLAG 928 240 0
FLAG 928 48 2v5
FLAG -176 0 2v5
FLAG 368 0 v+
FLAG 368 160 v-
FLAG 1600 800 2v5
FLAG 976 496 v+
FLAG 1408 592 v+
FLAG 976 768 v+
FLAG 976 432 v-
FLAG 1408 656 v-
FLAG 976 832 v-
FLAG 2048 736 Imeas
FLAG 1936 880 0
TEXT 1480 -8 Left 2 !.tran 0.5m
TEXT 1480 24 Left 2 !.step param Vcmd 0.1 5 1
TEXT 496 880 Left 2 ;Electrode
TEXT 1480 56 Left 2 !.inc OPA1678.cir
TEXT 808 -160 Left 2 ;Total area: 15x 0201s (.45 x0.9) + 1x QFN16 (3x3) = 15 mm2\nI think this version is too slow!