* SPICE netlist
V_RESET RESET 0 PULSE(0 1.8 10u 10n 10n 10n 1 1)
V_REF N001 0 5
V_VDD N003 0 1.8
RREF REF N001 1
CREF REF 0 1F
V_CNV CNV 0 PULSE(0 1.8 110u 10n 10n 10n {t_cnv})
A1 vsample 0 in0_sampled 0 0 0 vsampled_in0 0 SAMPLEHOLD
C2 vsampled_in0 0 1p
C6 vsample 0 1p
A4 vsample 0 in1_sampled 0 0 0 vsampled_in1 0 SAMPLEHOLD
C8 vsampled_in1 0 1p
V_SLCT0 N004 0 PULSE(0 1.8 {110u+0.5*t_cnv} 10n 10n {t_cnv-20n} {t_cnv*2})
A3 CH_OUT0 0 0 0 0 in0_sampled in1_sampled 0 BUF td=400n trise = 1n
V_AVDD N002 0 5
V_SLCT1 N005 0 PULSE(0 1.8 {110u-0.5*t_cnv+2*t_cnv} 10n 10n {2*t_cnv-20n} {t_cnv*4})
V_SLCT2 N006 0 PULSE(0 1.8 {110u-0.5*t_cnv+4*t_cnv} 10n 10n {4*t_cnv-20n} {t_cnv*8})
R4 IN7 VS7 {Rext} noiseless
C5 IN7 0 {Cext}
V4 VS7 0 4.8
R9 IN6 VS6 {Rext} noiseless
C12 IN6 0 {Cext}
V9 VS6 0 4.2
R3 IN5 VS5 {Rext} noiseless
C4 IN5 0 {Cext}
V3 VS5 0 3.6
R10 IN4 VS4 {Rext} noiseless
C13 IN4 0 {Cext}
V10 VS4 0 3
R11 IN3 VS3 {Rext} noiseless
C14 IN3 0 {Cext}
V11 VS3 0 2.4
R12 IN2 VS2 {Rext} noiseless
C15 IN2 0 {Cext}
V12 VS2 0 1.8
R13 IN1 VS1 {Rext} noiseless
C16 IN1 0 {Cext}
V13 VS1 0 1.2
R14 IN0 VS0 {Rext} noiseless
C17 IN0 0 {Cext}
V14 VS0 0 0.6
XU1 IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 0 N004 N005 N006 0 CH_OUT0 NC_09 NC_10 vsample RESET CNV N003 N002 N002 REF REF AD4696 OSR=1 SEQ_EN=0 CNV_FREQ_NOISE=0 CNV_CH_NOISE=0 COM_OPT=0 ;pnba IN0)IN1)IN2)IN3)IN4)IN5)IN6)IN7)COMM)SLCT0)SLCT1)SLCT2)REFGND)CH_OUT0)CH_OUT1)CH_OUT2)VSAMPLE)RESET)CNV)VDD)LDO_IN)AVDD)REF)REFIN
.tran 0 {t_cnv*64+110u}
.param f_cnv=1Meg
.param t_cnv=1/f_cnv
.param Rext=4.12k
.param Cext=1n

* LTspice schematic (.asc)
Version 4
SHEET 1 2048 2304
WIRE -1008 -1136 -1024 -1136
WIRE -800 -1136 -1008 -1136
WIRE -640 -1136 -720 -1136
WIRE -576 -1136 -640 -1136
WIRE -544 -1136 -576 -1136
WIRE -1024 -1088 -1024 -1136
WIRE -640 -1088 -640 -1136
WIRE -640 -1008 -640 -1024
WIRE -1024 -976 -1024 -1008
WIRE -1008 -832 -1024 -832
WIRE -800 -832 -1008 -832
WIRE -640 -832 -720 -832
WIRE -576 -832 -640 -832
WIRE -544 -832 -576 -832
WIRE -1024 -784 -1024 -832
WIRE -640 -784 -640 -832
WIRE -640 -704 -640 -720
WIRE -1024 -672 -1024 -704
WIRE -288 -640 -400 -640
WIRE -176 -640 -288 -640
WIRE -288 -624 -288 -640
WIRE -400 -560 -400 -640
WIRE -1008 -528 -1024 -528
WIRE -800 -528 -1008 -528
WIRE -640 -528 -720 -528
WIRE -576 -528 -640 -528
WIRE -544 -528 -576 -528
WIRE -288 -528 -288 -544
WIRE 16 -528 16 -560
WIRE -1024 -480 -1024 -528
WIRE -640 -480 -640 -528
WIRE 112 -464 112 -480
WIRE -400 -432 -400 -496
WIRE -336 -432 -400 -432
WIRE -288 -432 -288 -448
WIRE -288 -432 -336 -432
WIRE -640 -400 -640 -416
WIRE -336 -400 -336 -432
WIRE -176 -384 -176 -640
WIRE -176 -384 -208 -384
WIRE -1024 -368 -1024 -400
WIRE 16 -368 16 -448
WIRE 64 -368 16 -368
WIRE -208 -352 -208 -384
WIRE -176 -352 -176 -384
WIRE 16 -352 16 -368
WIRE 64 -352 64 -368
WIRE 112 -352 112 -384
WIRE -320 -336 -400 -336
WIRE -320 -304 -400 -304
WIRE -320 -272 -400 -272
WIRE 288 -256 192 -256
WIRE 656 -256 288 -256
WIRE -320 -240 -400 -240
WIRE 656 -240 656 -256
WIRE -1008 -224 -1024 -224
WIRE -800 -224 -1008 -224
WIRE -640 -224 -720 -224
WIRE -576 -224 -640 -224
WIRE -544 -224 -576 -224
WIRE 288 -224 192 -224
WIRE 464 -224 288 -224
WIRE -320 -208 -400 -208
WIRE 464 -192 464 -224
WIRE -1024 -176 -1024 -224
WIRE -640 -176 -640 -224
WIRE -320 -176 -400 -176
WIRE -320 -144 -400 -144
WIRE 256 -144 192 -144
WIRE 320 -144 256 -144
WIRE 656 -144 656 -160
WIRE 256 -128 256 -144
WIRE -320 -112 -400 -112
WIRE -640 -96 -640 -112
WIRE 464 -96 464 -112
WIRE -1024 -64 -1024 -96
WIRE -320 -64 -400 -64
WIRE 256 -48 256 -64
WIRE -320 -32 -448 -32
WIRE 720 -16 656 -16
WIRE -320 0 -400 0
WIRE 480 16 400 16
WIRE -320 32 -352 32
WIRE 256 32 192 32
WIRE 336 32 256 32
WIRE 944 32 896 32
WIRE 1024 32 944 32
WIRE 624 48 400 48
WIRE 720 48 624 48
WIRE 944 48 944 32
WIRE -1008 80 -1024 80
WIRE -800 80 -1008 80
WIRE -640 80 -720 80
WIRE -576 80 -640 80
WIRE -544 80 -576 80
WIRE -64 80 -64 64
WIRE 336 80 336 64
WIRE -1024 128 -1024 80
WIRE -640 128 -640 80
WIRE 720 128 720 112
WIRE 944 128 944 112
WIRE -640 208 -640 192
WIRE -352 224 -352 32
WIRE 720 224 656 224
WIRE -1024 240 -1024 208
WIRE 944 272 896 272
WIRE 1024 272 944 272
WIRE 480 288 480 16
WIRE 624 288 480 288
WIRE 720 288 624 288
WIRE 944 288 944 272
WIRE -352 320 -352 304
WIRE -400 352 -400 0
WIRE 720 368 720 352
WIRE 944 368 944 352
WIRE -1008 384 -1024 384
WIRE -800 384 -1008 384
WIRE -640 384 -720 384
WIRE -576 384 -640 384
WIRE -544 384 -576 384
WIRE -1024 432 -1024 384
WIRE -640 432 -640 384
WIRE -400 448 -400 432
WIRE -448 480 -448 -32
WIRE -640 512 -640 496
WIRE -1024 544 -1024 512
WIRE -448 592 -448 560
WIRE -1008 688 -1024 688
WIRE -800 688 -1008 688
WIRE -640 688 -720 688
WIRE -576 688 -640 688
WIRE -544 688 -576 688
WIRE -1024 736 -1024 688
WIRE -640 736 -640 688
WIRE -640 816 -640 800
WIRE -1024 848 -1024 816
WIRE -1008 992 -1024 992
WIRE -800 992 -1008 992
WIRE -640 992 -720 992
WIRE -576 992 -640 992
WIRE -544 992 -576 992
WIRE -1024 1040 -1024 992
WIRE -640 1040 -640 992
WIRE -640 1120 -640 1104
WIRE -1024 1152 -1024 1120
FLAG 112 -480 0
FLAG -336 -400 0
FLAG 656 -144 0
FLAG 464 -96 0
FLAG 656 -16 vsample
FLAG 624 48 in0_sampled
FLAG 1024 32 vsampled_in0
FLAG 944 128 0
FLAG 256 -48 0
FLAG 656 224 vsample
FLAG 624 288 in1_sampled
FLAG 1024 272 vsampled_in1
FLAG 944 368 0
FLAG -400 -336 IN0
FLAG -400 -304 IN1
FLAG -448 592 0
FLAG -64 80 0
FLAG 288 -224 RESET
FLAG -208 -384 REF
FLAG 288 -256 CNV
FLAG 256 32 CH_OUT0
FLAG 320 -144 vsample
FLAG 16 -560 0
FLAG -400 448 0
FLAG -352 320 0
FLAG -640 1120 0
FLAG -576 992 IN7
FLAG -1008 992 VS7
FLAG -1024 1152 0
FLAG -400 -272 IN2
FLAG -400 -240 IN3
FLAG -400 -208 IN4
FLAG -400 -176 IN5
FLAG -400 -144 IN6
FLAG -400 -112 IN7
FLAG -400 -64 0
FLAG -640 816 0
FLAG -576 688 IN6
FLAG -1008 688 VS6
FLAG -1024 848 0
FLAG -640 512 0
FLAG -576 384 IN5
FLAG -1008 384 VS5
FLAG -1024 544 0
FLAG -640 208 0
FLAG -576 80 IN4
FLAG -1008 80 VS4
FLAG -1024 240 0
FLAG -640 -96 0
FLAG -576 -224 IN3
FLAG -1008 -224 VS3
FLAG -1024 -64 0
FLAG -640 -400 0
FLAG -576 -528 IN2
FLAG -1008 -528 VS2
FLAG -1024 -368 0
FLAG -640 -704 0
FLAG -576 -832 IN1
FLAG -1008 -832 VS1
FLAG -1024 -672 0
FLAG -640 -1008 0
FLAG -576 -1136 IN0
FLAG -1008 -1136 VS0
FLAG -1024 -976 0
FLAG 336 80 0
FLAG 720 128 0
FLAG 720 368 0
SYMBOL voltage 464 -208 R0
SYMATTR InstName V_RESET
SYMATTR Value PULSE(0 1.8 10u 10n 10n 10n 1 1)
SYMBOL voltage -288 -544 R0
SYMATTR InstName V_REF
SYMATTR Value 5
SYMBOL voltage 112 -368 M180
SYMATTR InstName V_VDD
SYMATTR Value 1.8
SYMBOL res -304 -640 R0
SYMATTR InstName RREF
SYMATTR Value 1
SYMBOL cap -416 -560 R0
SYMATTR InstName CREF
SYMATTR Value 1F
SYMBOL voltage 656 -256 R0
SYMATTR Value PULSE(0 1.8 110u 10n 10n 10n {t_cnv})
SYMATTR InstName V_CNV
SYMBOL SpecialFunctions\\sample 800 16 R0
SYMATTR InstName A1
SYMBOL cap 928 48 R0
SYMATTR InstName C2
SYMATTR Value 1p
SYMBOL cap 240 -128 R0
SYMATTR InstName C6
SYMATTR Value 1p
SYMBOL SpecialFunctions\\sample 800 256 R0
SYMATTR InstName A4
SYMBOL cap 928 288 R0
SYMATTR InstName C8
SYMATTR Value 1p
SYMBOL voltage -448 464 R0
SYMATTR Value PULSE(0 1.8 {110u+0.5*t_cnv} 10n 10n {t_cnv-20n} {t_cnv*2})
SYMATTR InstName V_SLCT0
SYMBOL Digital\\buf 336 -32 R0
SYMATTR Value td=400n
SYMATTR InstName A3
SYMATTR Value2 trise = 1n
SYMBOL voltage 16 -432 M180
SYMATTR InstName V_AVDD
SYMATTR Value 5
SYMBOL voltage -400 336 R0
SYMATTR Value PULSE(0 1.8 {110u-0.5*t_cnv+2*t_cnv} 10n 10n {2*t_cnv-20n} {t_cnv*4})
SYMATTR InstName V_SLCT1
SYMBOL voltage -352 208 R0
SYMATTR Value PULSE(0 1.8 {110u-0.5*t_cnv+4*t_cnv} 10n 10n {4*t_cnv-20n} {t_cnv*8})
SYMATTR InstName V_SLCT2
SYMBOL res -704 976 R90
SYMATTR InstName R4
SYMATTR Value {Rext} noiseless
SYMBOL cap -656 1040 R0
SYMATTR Value {Cext}
SYMATTR InstName C5
SYMBOL voltage -1024 1024 R0
SYMATTR Value 4.8
SYMATTR InstName V4
SYMBOL res -704 672 R90
SYMATTR InstName R9
SYMATTR Value {Rext} noiseless
SYMBOL cap -656 736 R0
SYMATTR Value {Cext}
SYMATTR InstName C12
SYMBOL voltage -1024 720 R0
SYMATTR Value 4.2
SYMATTR InstName V9
SYMBOL res -704 368 R90
SYMATTR InstName R3
SYMATTR Value {Rext} noiseless
SYMBOL cap -656 432 R0
SYMATTR Value {Cext}
SYMATTR InstName C4
SYMBOL voltage -1024 416 R0
SYMATTR Value 3.6
SYMATTR InstName V3
SYMBOL res -704 64 R90
SYMATTR InstName R10
SYMATTR Value {Rext} noiseless
SYMBOL cap -656 128 R0
SYMATTR Value {Cext}
SYMATTR InstName C13
SYMBOL voltage -1024 112 R0
SYMATTR Value 3
SYMATTR InstName V10
SYMBOL res -704 -240 R90
SYMATTR InstName R11
SYMATTR Value {Rext} noiseless
SYMBOL cap -656 -176 R0
SYMATTR Value {Cext}
SYMATTR InstName C14
SYMBOL voltage -1024 -192 R0
SYMATTR Value 2.4
SYMATTR InstName V11
SYMBOL res -704 -544 R90
SYMATTR InstName R12
SYMATTR Value {Rext} noiseless
SYMBOL cap -656 -480 R0
SYMATTR Value {Cext}
SYMATTR InstName C15
SYMBOL voltage -1024 -496 R0
SYMATTR Value 1.8
SYMATTR InstName V12
SYMBOL res -704 -848 R90
SYMATTR InstName R13
SYMATTR Value {Rext} noiseless
SYMBOL cap -656 -784 R0
SYMATTR Value {Cext}
SYMATTR InstName C16
SYMBOL voltage -1024 -800 R0
SYMATTR Value 1.2
SYMATTR InstName V13
SYMBOL res -704 -1152 R90
SYMATTR InstName R14
SYMATTR Value {Rext} noiseless
SYMBOL cap -656 -1088 R0
SYMATTR Value {Cext}
SYMATTR InstName C17
SYMBOL voltage -1024 -1104 R0
SYMATTR Value 0.6
SYMATTR InstName V14
SYMBOL AD4696 -240 -64 R0
SYMATTR InstName U1