* SPICE netlist
XU1 N002 N003 V+ V- Vout100 ADA4891-1 ;pnba In+)In-)V+)V-)OUT
XU2 N014 N015 V+ V- Vout1 ADA4891-1 ;pnba In+)In-)V+)V-)OUT
V1 N017 0 SINE(0 .01 100000 0 0 0 25)
V2 0 V- 2.5V
R1 N015 0 1K tol=1 pwr=0.1
R2 N014 N013 1K tol=1 pwr=0.1
R3 VRef N014 1K tol=1 pwr=0.1
R4 Vout1 N015 1K tol=1 pwr=0.1
V4 VRef 0 1.25V
V3 V+ 0 2.5V
R5 VRef N002 61.9K tol=1 pwr=0.1
R6 N003 0 1K tol=1 pwr=0.1
R7 N002 N001 1K tol=1 pwr=0.1
R8 Vout100 N003 61.9K tol=1 pwr=0.1
R9 N001 N007 100 tol=1 pwr=0.1
XU5 N012 N010 V+ V- N007 ADA4891-1 ;pnba In+)In-)V+)V-)OUT
R10 N007 N012 10.2K
R11 N012 0 137
R12 N007 N010 100K
R13 N005 N006 133K
C1 N010 N006 160p
C2 N007 N006 160p
XU4 N011 N009 V+ V- N005 ADA4891-1 ;pnba In+)In-)V+)V-)OUT
R14 N005 N011 10.0K
R15 N011 0 133
R16 N005 N009 97.6K
R17 N008 N004 127K
C3 N009 N004 160p
C4 N005 N004 160p
V5 NC_01 0 PULSE(-0.01 .01 0 0 0 5u 10u 100)
R18 N006 0 1.02K
R20 N004 0 976
C5 N001 0 75p
BNoise N008 N016 V=white(time*5MEG)*.05
V6 N016 N017 SINE(0 .5 5000000 0 0 0 0)
.tran 0 .0004 0 .05u

* LTspice schematic (.asc)
Version 4
SHEET 1 2960 1072
WIRE 1272 -520 1272 -536
WIRE 1368 -408 1368 -424
WIRE 1144 -392 1080 -392
WIRE 1272 -392 1272 -440
WIRE 1272 -392 1224 -392
WIRE 1336 -392 1272 -392
WIRE 1432 -376 1400 -376
WIRE 1464 -376 1432 -376
WIRE 1336 -360 1272 -360
WIRE 1368 -328 1368 -344
WIRE -344 -232 -376 -232
WIRE -248 -232 -280 -232
WIRE -88 -232 -248 -232
WIRE 1272 -232 1272 -360
WIRE 1320 -232 1272 -232
WIRE 1432 -232 1432 -376
WIRE 1432 -232 1400 -232
WIRE 296 -216 264 -216
WIRE 392 -216 360 -216
WIRE 552 -216 392 -216
WIRE -248 -200 -248 -232
WIRE 392 -184 392 -216
WIRE 1272 -184 1272 -232
WIRE -1272 -120 -1272 -152
WIRE -136 -104 -136 -120
WIRE -472 -88 -696 -88
WIRE -376 -88 -376 -232
WIRE -376 -88 -392 -88
WIRE -344 -88 -376 -88
WIRE -248 -88 -248 -120
WIRE -248 -88 -280 -88
WIRE -168 -88 -248 -88
WIRE 504 -88 504 -104
WIRE -88 -72 -88 -232
WIRE -88 -72 -104 -72
WIRE 152 -72 -88 -72
WIRE 264 -72 264 -216
WIRE 264 -72 232 -72
WIRE 296 -72 264 -72
WIRE 392 -72 392 -104
WIRE 392 -72 360 -72
WIRE 472 -72 392 -72
WIRE 1272 -72 1272 -104
WIRE -376 -56 -376 -88
WIRE -168 -56 -200 -56
WIRE -88 -56 -88 -72
WIRE 552 -56 552 -216
WIRE 552 -56 536 -56
WIRE 712 -56 552 -56
WIRE 824 -56 792 -56
WIRE 1080 -56 1080 -392
WIRE 1080 -56 824 -56
WIRE 264 -40 264 -72
WIRE 472 -40 440 -40
WIRE 552 -40 552 -56
WIRE -1272 -24 -1272 -40
WIRE -1160 -24 -1272 -24
WIRE -136 -24 -136 -40
WIRE 824 -24 824 -56
WIRE 504 -8 504 -24
WIRE -1272 8 -1272 -24
WIRE -1160 8 -1160 -24
WIRE -1480 24 -1480 -8
WIRE -376 56 -376 24
WIRE -200 56 -200 -56
WIRE -88 56 -88 24
WIRE -88 56 -200 56
WIRE 1272 56 1272 24
WIRE -696 72 -696 -88
WIRE -88 72 -88 56
WIRE 440 72 440 -40
WIRE 552 72 552 40
WIRE 552 72 440 72
WIRE 824 72 824 40
WIRE 552 88 552 72
WIRE 264 104 264 40
WIRE -1272 120 -1272 88
WIRE -1480 136 -1480 104
WIRE -88 168 -88 152
WIRE 1368 168 1368 152
WIRE 552 184 552 168
WIRE 1144 184 1080 184
WIRE 1272 184 1272 136
WIRE 1272 184 1224 184
WIRE 1336 184 1272 184
WIRE 1432 200 1400 200
WIRE 1480 200 1432 200
WIRE 1336 216 1272 216
WIRE 1368 248 1368 232
WIRE -696 264 -696 152
WIRE 1272 360 1272 216
WIRE 1320 360 1272 360
WIRE 1432 360 1432 200
WIRE 1432 360 1400 360
WIRE -696 408 -696 344
WIRE 1272 408 1272 360
WIRE -696 520 -696 488
WIRE 1272 520 1272 488
WIRE 136 536 136 504
FLAG -696 520 0
FLAG -1160 8 0
FLAG -1272 120 V-
FLAG 1368 248 V+
FLAG 1368 152 V-
FLAG 1272 520 0
FLAG -1480 136 0
FLAG -1272 -152 V+
FLAG -1480 -8 VRef
FLAG 1272 24 VRef
FLAG 1368 -328 V+
FLAG 1368 -424 V-
FLAG 1272 -536 VRef
FLAG 1272 -72 0
FLAG 1464 -376 Vout100
FLAG 1480 200 Vout1
FLAG 504 -8 V-
FLAG 504 -104 V+
FLAG 552 184 0
FLAG -136 -24 V-
FLAG -136 -120 V+
FLAG -88 168 0
FLAG 136 536 0
FLAG 264 104 0
FLAG -376 56 0
FLAG 824 72 0
SYMBOL OpAmps\\ADA4891-2 1368 -312 M180
SYMATTR InstName U1
SYMBOL OpAmps\\ADA4891-2 1368 264 M180
SYMATTR InstName U2
SYMBOL voltage -696 392 R0
SYMATTR Value SINE(0 .01 100000 0 0 0 25)
SYMATTR InstName V1
SYMBOL voltage -1272 -8 R0
SYMATTR InstName V2
SYMATTR Value 2.5V
SYMBOL res 1256 392 R0
SYMATTR InstName R1
SYMATTR Value 1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 1240 168 R90
SYMATTR InstName R2
SYMATTR Value 1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 1256 40 R0
SYMATTR InstName R3
SYMATTR Value 1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 1416 344 R90
SYMATTR InstName R4
SYMATTR Value 1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage -1480 8 R0
SYMATTR InstName V4
SYMATTR Value 1.25V
SYMBOL voltage -1272 -136 R0
SYMATTR InstName V3
SYMATTR Value 2.5V
SYMBOL res 1256 -536 R0
SYMATTR InstName R5
SYMATTR Value 61.9K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 1256 -200 R0
SYMATTR InstName R6
SYMATTR Value 1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 1240 -408 R90
SYMATTR InstName R7
SYMATTR Value 1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 1416 -248 R90
SYMATTR InstName R8
SYMATTR Value 61.9K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 808 -72 R90
SYMATTR InstName R9
SYMATTR Value 100
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL OpAmps\\ADA4891 504 -120 R0
SYMATTR InstName U5
SYMBOL res 536 -56 R0
SYMATTR InstName R10
SYMATTR Value 10.2K
SYMBOL res 536 72 R0
SYMATTR InstName R11
SYMATTR Value 137
SYMBOL res 376 -200 R0
SYMATTR InstName R12
SYMATTR Value 100K
SYMBOL res 136 -56 R270
SYMATTR InstName R13
SYMATTR Value 133K
SYMBOL cap 360 -88 R90
SYMATTR InstName C1
SYMATTR Value 160p
SYMBOL cap 360 -232 R90
SYMATTR InstName C2
SYMATTR Value 160p
SYMBOL OpAmps\\ADA4891 -136 -136 R0
SYMATTR InstName U4
SYMBOL res -104 -72 R0
SYMATTR InstName R14
SYMATTR Value 10.0K
SYMBOL res -104 56 R0
SYMATTR InstName R15
SYMATTR Value 133
SYMBOL res -264 -216 R0
SYMATTR InstName R16
SYMATTR Value 97.6K
SYMBOL res -488 -72 R270
SYMATTR InstName R17
SYMATTR Value 127K
SYMBOL cap -280 -104 R90
SYMATTR InstName C3
SYMATTR Value 160p
SYMBOL cap -280 -248 R90
SYMATTR InstName C4
SYMATTR Value 160p
SYMBOL voltage 136 408 R0
SYMATTR Value PULSE(-0.01 .01 0 0 0 5u 10u 100)
SYMATTR InstName V5
SYMBOL res 248 -56 R0
SYMATTR InstName R18
SYMATTR Value 1.02K
SYMBOL res -392 -72 R0
SYMATTR InstName R20
SYMATTR Value 976
SYMBOL cap 808 -24 R0
SYMATTR InstName C5
SYMATTR Value 75p
SYMBOL bv -696 56 R0
SYMATTR InstName Noise
SYMATTR Value V=white(time*5MEG)*.05
SYMBOL voltage -696 248 R0
SYMATTR Value SINE(0 .5 5000000 0 0 0 0)
SYMATTR InstName V6