* SPICE netlist
R5 N001 IOUTP_A 225 tol=1 pwr=0.1
R33 0 IOUTN_A 25 tol=1 pwr=0.1
R32 N001 0 500 tol=1 pwr=0.1
R3 IOUTN_A N004 225 tol=1 pwr=0.1
R40 Ant N003 25 tol=1 pwr=0.1
R39 IOUTP_A 0 25 tol=1 pwr=0.1
R34 N003 N002 25 tol=1 pwr=0.1
C31 N003 0 100p
V1 IOUTP_A IOUTN_A SINE(0 0.1 1Meg) AC 1 0 Rser=50
V2 AVDD1 0 3.3
C14 IOUTP_A IOUTN_A 20p
V3 3_3V_NEG1 0 -3.3
R4 N002 N004 500 tol=1 pwr=0.1
C33 N002 N004 4.7p
C_ant Ant N005 10
R_ant N005 0 50
XU1 N004 N001 AVDD1 3_3V_NEG1 N002 AD8047 ;pnba In+)In-)V+)V-)OUT
.ac oct 10 10e3 40e6

* LTspice schematic (.asc)
Version 4
SHEET 1 1312 736
WIRE 304 -352 256 -352
WIRE 384 -352 304 -352
WIRE 576 -352 512 -352
WIRE 656 -352 576 -352
WIRE -112 -208 -112 -240
WIRE 48 -208 48 -240
WIRE -336 -128 -336 -160
WIRE -336 -128 -656 -128
WIRE -224 -128 -336 -128
WIRE -112 -128 -224 -128
WIRE -80 -128 -112 -128
WIRE 48 -128 0 -128
WIRE 96 -128 48 -128
WIRE -656 -112 -656 -128
WIRE -224 -96 -224 -128
WIRE 144 -96 144 -176
WIRE 96 -80 96 -128
WIRE 112 -80 96 -80
WIRE 256 -64 176 -64
WIRE 400 -64 336 -64
WIRE 464 -64 400 -64
WIRE 592 -64 544 -64
WIRE 656 -64 592 -64
WIRE 112 -48 96 -48
WIRE 400 -48 400 -64
WIRE -656 0 -656 -32
WIRE -336 0 -656 0
WIRE -224 0 -224 -32
WIRE -224 0 -336 0
WIRE -112 0 -224 0
WIRE -80 0 -112 0
WIRE 96 0 96 -48
WIRE 96 0 0 0
WIRE 592 16 592 0
WIRE -336 32 -336 0
WIRE 144 48 144 -32
WIRE 400 48 400 16
WIRE -112 112 -112 80
WIRE 592 128 592 96
WIRE 96 256 96 0
WIRE 112 256 96 256
WIRE 256 256 256 -64
WIRE 256 256 192 256
WIRE 96 368 96 256
WIRE 112 368 96 368
WIRE 256 368 256 256
WIRE 256 368 176 368
FLAG -112 -240 0
FLAG 48 -240 0
FLAG 656 -64 Ant
IOPIN 256 176 In
FLAG -112 112 0
FLAG 304 -352 AVDD1
FLAG 384 -272 0
FLAG -336 -160 IOUTP_A
IOPIN -736 80 In
FLAG -336 32 IOUTN_A
IOPIN -736 272 In
FLAG 656 -272 0
FLAG 576 -352 3_3V_NEG1
FLAG 144 -176 AVDD1
FLAG 144 48 3_3V_NEG1
FLAG 400 48 0
FLAG 592 128 0
SYMBOL res 16 -144 R90
SYMATTR InstName R5
SYMATTR Value 225
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -96 96 R180
SYMATTR InstName R33
SYMATTR Value 25
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 64 -112 R180
SYMATTR InstName R32
SYMATTR Value 500
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -96 16 R270
SYMATTR InstName R3
SYMATTR Value 225
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 560 -80 R90
SYMATTR InstName R40
SYMATTR Value 25
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -96 -112 R180
SYMATTR InstName R39
SYMATTR Value 25
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 352 -80 R90
SYMATTR InstName R34
SYMATTR Value 25
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL cap 384 -48 R0
SYMATTR InstName C31
SYMATTR Value 100p
SYMBOL voltage -656 -128 R0
SYMATTR Value2 AC 1 0
SYMATTR SpiceLine Rser=50
SYMATTR InstName V1
SYMATTR Value SINE(0 0.1 1Meg)
SYMBOL voltage 384 -368 R0
SYMATTR Value2 ""
SYMATTR SpiceLine ""
SYMATTR InstName V2
SYMATTR Value 3.3
SYMBOL cap -240 -96 R0
SYMATTR InstName C14
SYMATTR Value 20p
SYMBOL voltage 656 -368 R0
SYMATTR Value2 ""
SYMATTR SpiceLine ""
SYMATTR InstName V3
SYMATTR Value -3.3
SYMBOL res 208 240 R90
SYMATTR InstName R4
SYMATTR Value 500
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL cap 176 352 R90
SYMATTR InstName C33
SYMATTR Value 4.7p
SYMBOL cap 576 -64 R0
SYMATTR InstName C_ant
SYMATTR Value 10
SYMBOL res 576 0 R0
SYMATTR InstName R_ant
SYMATTR Value 50
SYMBOL AD8047 144 -128 R0
SYMATTR InstName U1