* SPICE netlist
V1 Vcc 0 +27.5 Rser=0.1
V2 0 Vee +27.5 Rser=0.1
R1 N003 StimulusVoltage 2K
R2 0 N003 2K
V3 CmdVoltagePlus 0 12.5
V4 0 CmdVoltageMinus 12.5
R3 StimulusVoltage N006 10K
R4 N006 N007 85Meg
R8 N001 N002 1K
R9 N002 0 5K
R10 N004 OutPlus 5K
R11 N005 N004 1K
XU1 CmdVoltagePlus N003 Vcc Vee StimulusVoltage ADA4522-1 ;pnba In+)In-)V+)V-)OUT
XU2 N002 N004 Vcc Vee OutPlus ADA4522-1 ;pnba In+)In-)V+)V-)OUT
XU3 StimulusVoltage N001 Vcc Vee N001 ADA4522-1 ;pnba In+)In-)V+)V-)OUT
XU4 N006 N005 Vcc Vee N005 ADA4522-1 ;pnba In+)In-)V+)V-)OUT
R5 N013 N012 2K
R6 0 N013 2K
R7 N007 N012 10K
R12 N008 N009 1K
R13 N009 0 5K
R14 N010 OutMinus 5K
R15 N011 N010 1K
XU5 CmdVoltageMinus N013 Vcc Vee N012 ADA4522-1 ;pnba In+)In-)V+)V-)OUT
XU6 N009 N010 Vcc Vee OutMinus ADA4522-1 ;pnba In+)In-)V+)V-)OUT
XU7 N007 N008 Vcc Vee N008 ADA4522-1 ;pnba In+)In-)V+)V-)OUT
XU8 N012 N011 Vcc Vee N011 ADA4522-1 ;pnba In+)In-)V+)V-)OUT
.tran 0 1 .001

* LTspice schematic (.asc)
Version 4
SHEET 1 1696 1232
WIRE -192 -600 -320 -600
WIRE -384 -584 -432 -584
WIRE -240 -568 -320 -568
WIRE 848 -552 848 -584
WIRE 608 -536 608 -568
WIRE -752 -488 -768 -488
WIRE -576 -488 -672 -488
WIRE -560 -488 -576 -488
WIRE -432 -488 -432 -584
WIRE -432 -488 -480 -488
WIRE -768 -472 -768 -488
WIRE 320 -424 320 -472
WIRE 320 -424 192 -424
WIRE 608 -424 608 -456
WIRE 704 -424 608 -424
WIRE 848 -424 848 -472
WIRE 848 -424 704 -424
WIRE -432 -408 -432 -488
WIRE -240 -408 -240 -568
WIRE -240 -408 -432 -408
WIRE -192 -408 -192 -600
WIRE -16 -408 -16 -472
WIRE -16 -408 -192 -408
WIRE 80 -408 -16 -408
WIRE 128 -408 80 -408
WIRE 704 -408 704 -424
WIRE 224 -392 192 -392
WIRE 608 -392 608 -424
WIRE 848 -392 848 -424
WIRE -16 -376 -16 -408
WIRE -576 -360 -576 -488
WIRE -576 -360 -592 -360
WIRE -768 -344 -848 -344
WIRE -656 -344 -768 -344
WIRE -576 -328 -592 -328
WIRE -240 -280 -432 -280
WIRE -16 -264 -16 -296
WIRE -16 -264 -192 -264
WIRE 80 -248 80 -408
WIRE 112 -248 80 -248
WIRE 224 -248 224 -392
WIRE 224 -248 192 -248
WIRE 240 -248 224 -248
WIRE 352 -248 320 -248
WIRE 848 -248 848 -312
WIRE 608 -232 608 -312
WIRE -768 -216 -768 -344
WIRE -752 -216 -768 -216
WIRE -576 -216 -576 -328
WIRE -576 -216 -672 -216
WIRE -560 -216 -576 -216
WIRE -432 -216 -432 -280
WIRE -432 -216 -480 -216
WIRE 352 -216 352 -248
WIRE -240 -120 -240 -280
WIRE -240 -120 -320 -120
WIRE -432 -104 -432 -216
WIRE -384 -104 -432 -104
WIRE -192 -88 -192 -264
WIRE -192 -88 -320 -88
WIRE -16 -56 -16 -264
WIRE -192 88 -320 88
WIRE -384 104 -432 104
WIRE -240 120 -320 120
WIRE -752 200 -768 200
WIRE -576 200 -672 200
WIRE -560 200 -576 200
WIRE -432 200 -432 104
WIRE -432 200 -480 200
WIRE -768 216 -768 200
WIRE -432 280 -432 200
WIRE -240 280 -240 120
WIRE -240 280 -432 280
WIRE -192 280 -192 88
WIRE -16 280 -16 24
WIRE -16 280 -192 280
WIRE -16 312 -16 280
WIRE -576 328 -576 200
WIRE -576 328 -592 328
WIRE -768 344 -848 344
WIRE -656 344 -768 344
WIRE -576 360 -592 360
WIRE -240 408 -432 408
WIRE 320 408 320 360
WIRE 320 408 192 408
WIRE -16 424 -16 392
WIRE -16 424 -192 424
WIRE 80 424 -16 424
WIRE 128 424 80 424
WIRE 224 440 192 440
WIRE -768 472 -768 344
WIRE -752 472 -768 472
WIRE -576 472 -576 360
WIRE -576 472 -672 472
WIRE -560 472 -576 472
WIRE -432 472 -432 408
WIRE -432 472 -480 472
WIRE -240 568 -240 408
WIRE -240 568 -320 568
WIRE -432 584 -432 472
WIRE -384 584 -432 584
WIRE 80 584 80 424
WIRE 112 584 80 584
WIRE 224 584 224 440
WIRE 224 584 192 584
WIRE 240 584 224 584
WIRE 352 584 320 584
WIRE -192 600 -192 424
WIRE -192 600 -320 600
WIRE 352 616 352 584
FLAG 704 -408 0
FLAG 608 -568 Vcc
FLAG 608 -232 Vee
FLAG 160 -376 Vcc
FLAG 352 -216 0
FLAG 848 -584 CmdVoltagePlus
FLAG 848 -248 CmdVoltageMinus
FLAG 320 -472 CmdVoltagePlus
FLAG -16 -472 StimulusVoltage
FLAG -352 -616 Vee
FLAG -352 -552 Vcc
FLAG 160 -440 Vee
FLAG -352 -72 Vee
FLAG -352 -136 Vcc
FLAG -624 -312 Vcc
FLAG -624 -376 Vee
FLAG -848 -344 OutPlus
FLAG -768 -472 0
FLAG 160 456 Vcc
FLAG 352 616 0
FLAG 320 360 CmdVoltageMinus
FLAG -352 72 Vee
FLAG -352 136 Vcc
FLAG 160 392 Vee
FLAG -352 616 Vee
FLAG -352 552 Vcc
FLAG -624 376 Vcc
FLAG -624 312 Vee
FLAG -848 344 OutMinus
FLAG -768 216 0
SYMBOL Misc\\battery 608 -552 R0
SYMATTR SpiceLine Rser=0.1
SYMATTR InstName V1
SYMATTR Value +27.5
SYMBOL Misc\\battery 608 -408 R0
SYMATTR SpiceLine Rser=0.1
SYMATTR InstName V2
SYMATTR Value +27.5
SYMBOL res 208 -264 R90
SYMATTR InstName R1
SYMATTR Value 2K
SYMBOL res 336 -264 R90
SYMATTR InstName R2
SYMATTR Value 2K
SYMBOL Misc\\battery 848 -568 R0
SYMATTR InstName V3
SYMATTR Value 12.5
SYMBOL Misc\\battery 848 -408 R0
SYMATTR InstName V4
SYMATTR Value 12.5
SYMBOL res -32 -392 R0
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res -32 -72 R0
SYMATTR InstName R4
SYMATTR Value 85Meg
SYMBOL res -464 -504 R90
SYMATTR InstName R8
SYMATTR Value 1K
SYMBOL res -656 -504 R90
SYMATTR InstName R9
SYMATTR Value 5K
SYMBOL res -656 -232 R90
SYMATTR InstName R10
SYMATTR Value 5K
SYMBOL res -464 -232 R90
SYMATTR InstName R11
SYMATTR Value 1K
SYMBOL Opamps\\ADA4522-1 160 -344 R180
SYMATTR InstName U1
SYMBOL Opamps\\ADA4522-1 -624 -280 R180
SYMATTR InstName U2
SYMBOL Opamps\\ADA4522-1 -352 -520 R180
SYMATTR InstName U3
SYMBOL Opamps\\ADA4522-1 -352 -168 M0
SYMATTR InstName U4
SYMBOL res 208 568 R90
SYMATTR InstName R5
SYMATTR Value 2K
SYMBOL res 336 568 R90
SYMATTR InstName R6
SYMATTR Value 2K
SYMBOL res -32 296 R0
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL res -464 184 R90
SYMATTR InstName R12
SYMATTR Value 1K
SYMBOL res -656 184 R90
SYMATTR InstName R13
SYMATTR Value 5K
SYMBOL res -656 456 R90
SYMATTR InstName R14
SYMATTR Value 5K
SYMBOL res -464 456 R90
SYMATTR InstName R15
SYMATTR Value 1K
SYMBOL Opamps\\ADA4522-1 160 488 R180
SYMATTR InstName U5
SYMBOL Opamps\\ADA4522-1 -624 408 R180
SYMATTR InstName U6
SYMBOL Opamps\\ADA4522-1 -352 168 R180
SYMATTR InstName U7
SYMBOL Opamps\\ADA4522-1 -352 520 M0
SYMATTR InstName U8