* SPICE netlist
V4 5V 0 5
Vicm N002 0 {Voffset}
Vin N001 0 SINE(0 {Ampl} 10k) AC 1
E3 AFE_Out 0 N003 N004 1
XU1 5V 0 NC_01 NC_02 NC_03 NC_04 IN+ IN- N003 N004 5V 5V ADAQ7767-1 ;pnba VDD_FDA)GND)IN1+)IN1-)IN2+)IN2-)IN3+)IN3-)ANALOG_OUT+)ANALOG_OUT-)M0_FDA)M1_FDA
B1 RTO_Noise 0 V=V(AFE_Out)+V(CoreADC_Noise)
B2 RTI_Noise 0 V=V(RTO_Noise)/{AFE_GAIN}
R1 N005 0 60.343
E4 CoreADC_Noise 0 N005 0 {ADC_Noise}
G1 N002 IN+ N001 0 50k
R2 IN+ N002 10
R3 N002 IN- 10
G2 IN- N002 N001 0 50k
.param Ampl =28.672
.meas NOISE noise_integ INTEG V(onoise)
.meas AC GAIN FIND mag(V(AFE_Out)) AT 100
.meas AC BW WHEN mag(V(AFE_Out)) = GAIN/sqrt(2)
.tran 200u
.param AFE_GAIN=1/7
.param Voffset =12
.param MCLK=16.384Meg
.param MCLK_DIV=2
.param ADC_Noise=33*sqrt(16.384Meg/(2*MCLK/MCLK_DIV))
.param BW_3dB=ODR*BW_Factor
.param DEC_RATE=32
.param ODR=MCLK/(MCLK_DIV*DEC_RATE)
.param BW_Factor=0.433

* LTspice schematic (.asc)
Version 4
SHEET 1 2656 784
WIRE -528 -392 -560 -392
WIRE -256 -392 -528 -392
WIRE -560 -344 -560 -392
WIRE -256 -344 -256 -392
WIRE -720 -312 -832 -312
WIRE -624 -312 -720 -312
WIRE -832 -248 -832 -312
WIRE -560 -248 -560 -264
WIRE -880 -232 -1056 -232
WIRE -720 -232 -720 -312
WIRE -880 -184 -928 -184
WIRE -832 -88 -832 -168
WIRE -720 -88 -720 -152
WIRE -720 -88 -832 -88
WIRE -624 -88 -624 -312
WIRE -496 -88 -624 -88
WIRE -464 -88 -496 -88
WIRE 464 -88 384 -88
WIRE 848 -88 784 -88
WIRE 1328 -88 1264 -88
WIRE 288 -56 224 -56
WIRE 384 -56 384 -88
WIRE 784 -56 784 -88
WIRE 1264 -56 1264 -88
WIRE 288 -40 288 -56
WIRE 336 -40 288 -40
WIRE -1056 8 -1056 -232
WIRE -1056 8 -1328 8
WIRE -832 8 -832 -88
WIRE -832 8 -976 8
WIRE 336 8 288 8
WIRE 288 24 288 8
WIRE 288 24 224 24
WIRE -1328 40 -1328 8
WIRE -976 40 -976 8
WIRE 384 56 384 24
WIRE 784 56 784 24
WIRE 1264 56 1264 24
WIRE -832 72 -832 8
WIRE -720 72 -832 72
WIRE -496 72 -624 72
WIRE -464 72 -496 72
WIRE -1328 152 -1328 120
WIRE -976 152 -976 120
WIRE -720 200 -720 72
WIRE -832 216 -832 72
WIRE -1056 232 -1056 8
WIRE -880 232 -1056 232
WIRE 528 248 400 248
WIRE 704 248 576 248
WIRE 400 264 400 248
WIRE -880 280 -928 280
WIRE 576 280 576 248
WIRE 528 296 528 248
WIRE -64 328 -64 312
WIRE -832 344 -832 296
WIRE -720 344 -720 280
WIRE -720 344 -832 344
WIRE -624 344 -624 72
WIRE -624 344 -720 344
WIRE -288 344 -288 312
WIRE -224 344 -224 312
WIRE -224 344 -288 344
WIRE -192 344 -224 344
WIRE 400 376 400 344
WIRE 528 376 528 344
WIRE 528 376 400 376
WIRE 576 376 576 360
WIRE 576 376 528 376
WIRE 400 392 400 376
FLAG -928 -184 0
FLAG -928 280 0
FLAG -528 -392 5V
FLAG -560 -248 0
FLAG -64 328 0
FLAG -976 152 0
FLAG -1328 152 0
FLAG 384 56 0
FLAG 464 -88 AFE_Out
FLAG -496 -88 IN+
FLAG -496 72 IN-
FLAG -192 344 5V
FLAG 784 56 0
FLAG 848 -88 RTO_Noise
FLAG 1264 56 0
FLAG 1328 -88 RTI_Noise
FLAG 400 392 0
FLAG 704 248 CoreADC_Noise
SYMBOL voltage -560 -360 R0
SYMATTR InstName V4
SYMATTR Value 5
SYMBOL voltage -976 24 R0
SYMATTR InstName Vicm
SYMATTR Value {Voffset}
SYMBOL voltage -1328 24 R0
SYMATTR Value2 AC 1
SYMATTR InstName Vin
SYMATTR Value SINE(0 {Ampl} 10k)
SYMBOL e 384 -72 R0
SYMATTR InstName E3
SYMATTR Value 1
SYMBOL ADAQ7767-1 -256 -8 R0
SYMATTR InstName U1
SYMBOL bv 784 -72 R0
SYMATTR InstName B1
SYMATTR Value V=V(AFE_Out)+V(CoreADC_Noise)
SYMBOL bv 1264 -72 R0
SYMATTR Value V=V(RTO_Noise)/{AFE_GAIN}
SYMATTR InstName B2
SYMBOL res 384 248 R0
SYMATTR InstName R1
SYMATTR Value 60.343
SYMBOL e 576 264 R0
SYMATTR InstName E4
SYMATTR Value {ADC_Noise}
SYMBOL g -832 -264 R0
SYMATTR InstName G1
SYMATTR Value 50k
SYMBOL res -736 -248 R0
SYMATTR InstName R2
SYMATTR Value 10
SYMBOL res -736 184 R0
SYMATTR InstName R3
SYMATTR Value 10
SYMBOL g -832 200 R0
SYMATTR InstName G2
SYMATTR Value 50k