* SPICE netlist
C4 N003 N002 0.22
R2 IAOUT N003 10Meg Noiseless
R5 0 REFIN 10Meg Noiseless
C5 0 REFIN 0.1
C6 0 +VS 0.1 Rpar=1G
R6 N001 N004 180k Noiseless
R7 N006 N007 180k Noiseless
Vin N001 N006 SINE(0 10m 1k) AC 1
Vs +VS 0 3
R8 N006 N005 10Meg Noiseless
R9 N005 N001 10Meg Noiseless
R4 +VS REFIN 10Meg Noiseless
V2 N008 0 1.5
R1 LOD 0 10Meg
V1 N005 0 3
R3 REFOUT 0 10Meg
VIN_OPAMP N009 0 SINE(1.5 10m 1k)
XU1 0 +VS LOD OUT +VS 0 +VS OUT REFIN 0 REFOUT N009 N003 IAOUT N008 NC_01 N002 N004 N007 N008 AD8233 ;pnba GND)_SDN)LOD)OUT)+VS)AC/_DC)RLD _SDN)OPAMP-)REFIN)FR)REFOUT)OPAMP+)HPSENSE)IAOUT)RLDFB)SW)HPDRIVE)+IN)-IN)RLD
.tran 10m

* LTspice schematic (.asc)
Version 4
SHEET 1 2016 816
WIRE -768 -408 -1008 -408
WIRE -512 -408 -768 -408
WIRE 176 -344 48 -344
WIRE 368 -344 240 -344
WIRE -768 -296 -768 -408
WIRE 48 -248 48 -344
WIRE 80 -248 48 -248
WIRE 368 -248 368 -344
WIRE 368 -248 336 -248
WIRE 464 -248 368 -248
WIRE 608 -248 544 -248
WIRE -512 -200 -512 -408
WIRE -480 -200 -512 -200
WIRE 80 -200 -400 -200
WIRE 400 -200 336 -200
WIRE 608 -200 608 -248
WIRE 608 -200 400 -200
WIRE -1008 -184 -1008 -408
WIRE -768 -168 -768 -216
WIRE -592 -168 -768 -168
WIRE -480 -152 -512 -152
WIRE 80 -152 -400 -152
WIRE 400 -152 336 -152
WIRE 608 -152 400 -152
WIRE 816 -152 608 -152
WIRE 1008 -152 816 -152
WIRE -592 -120 -592 -168
WIRE 608 -120 608 -152
WIRE 816 -120 816 -152
WIRE -224 -104 -400 -104
WIRE 80 -104 -224 -104
WIRE 384 -104 336 -104
WIRE 528 -104 384 -104
WIRE -768 -88 -768 -168
WIRE -224 -56 -224 -104
WIRE 80 -56 -224 -56
WIRE 368 -56 336 -56
WIRE -400 -40 -400 -104
WIRE 528 -24 528 -104
WIRE 608 -24 608 -40
WIRE 608 -24 528 -24
WIRE -592 -8 -592 -40
WIRE 368 -8 368 -56
WIRE 368 -8 336 -8
WIRE 400 -8 368 -8
WIRE 1008 -8 1008 -152
WIRE 400 8 400 -8
WIRE 528 8 528 -24
WIRE 608 8 608 -24
WIRE 80 40 -208 40
WIRE 368 40 368 -8
WIRE 368 40 336 40
WIRE -400 72 -400 40
WIRE -48 88 -80 88
WIRE 80 88 -48 88
WIRE 400 88 336 88
WIRE 416 88 400 88
WIRE 528 104 528 88
WIRE 608 104 608 72
WIRE 608 104 528 104
WIRE 816 104 816 -40
WIRE 816 104 608 104
WIRE 1008 104 1008 56
WIRE 1008 104 816 104
WIRE -1008 120 -1008 -104
WIRE -768 120 -768 -8
WIRE -768 120 -1008 120
WIRE -512 120 -512 -152
WIRE -512 120 -768 120
WIRE -208 120 -208 40
WIRE 608 120 608 104
WIRE 80 136 48 136
WIRE 400 136 400 88
WIRE 400 136 336 136
WIRE 48 184 48 136
WIRE 48 184 16 184
WIRE 80 184 48 184
WIRE 368 184 336 184
WIRE -208 248 -208 200
WIRE 368 248 368 184
WIRE -80 280 -80 88
WIRE 368 392 368 328
WIRE -80 408 -80 360
FLAG 368 184 LOD
FLAG 16 184 OUT
FLAG -48 88 REFOUT
FLAG 384 -104 +VS
FLAG 400 -200 IAOUT
FLAG 400 -152 REFIN
FLAG 608 120 0
FLAG 400 88 +VS
FLAG 400 8 0
FLAG -400 72 0
FLAG -208 248 0
FLAG 368 392 0
FLAG -592 -8 0
FLAG -80 408 0
SYMBOL cap 240 -360 R90
SYMATTR InstName C4
SYMATTR Value 0.22
SYMBOL res 560 -232 M270
SYMATTR Value 10Meg
SYMATTR InstName R2
SYMATTR Value2 Noiseless
SYMBOL res 800 -24 M180
SYMATTR Value 10Meg
SYMATTR InstName R5
SYMATTR Value2 Noiseless
SYMBOL cap 992 56 M180
SYMATTR InstName C5
SYMATTR Value 0.1
SYMBOL cap 592 72 M180
SYMATTR InstName C6
SYMATTR Value 0.1
SYMATTR SpiceLine Rpar=1G
SYMBOL res -496 -184 R270
SYMATTR Value 180k
SYMATTR InstName R6
SYMATTR Value2 Noiseless
SYMBOL res -496 -168 M90
SYMATTR Value 180k
SYMATTR InstName R7
SYMATTR Value2 Noiseless
SYMBOL voltage -1008 -200 M0
SYMATTR Value2 AC 1
SYMATTR Value SINE(0 10m 1k)
SYMATTR InstName Vin
SYMBOL voltage 528 -8 R0
SYMATTR InstName Vs
SYMATTR Value 3
SYMBOL res -752 8 R180
SYMATTR Value 10Meg
SYMATTR InstName R8
SYMATTR Value2 Noiseless
SYMBOL res -752 -200 R180
SYMATTR Value 10Meg
SYMATTR InstName R9
SYMATTR Value2 Noiseless
SYMBOL res 592 -24 M180
SYMATTR Value 10Meg
SYMATTR InstName R4
SYMATTR Value2 Noiseless
SYMBOL voltage -400 -56 R0
SYMATTR InstName V2
SYMATTR Value 1.5
SYMBOL res 352 232 R0
SYMATTR InstName R1
SYMATTR Value 10Meg
SYMBOL voltage -592 -136 R0
SYMATTR InstName V1
SYMATTR Value 3
SYMBOL res -96 264 R0
SYMATTR InstName R3
SYMATTR Value 10Meg
SYMBOL voltage -208 104 R0
SYMATTR Value SINE(1.5 10m 1k)
SYMATTR InstName VIN_OPAMP
SYMBOL AD8233 208 -24 R0
SYMATTR InstName U1