* 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 AD4698 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 2112 2304
WIRE -1040 -1136 -1056 -1136
WIRE -832 -1136 -1040 -1136
WIRE -672 -1136 -752 -1136
WIRE -608 -1136 -672 -1136
WIRE -576 -1136 -608 -1136
WIRE -1056 -1088 -1056 -1136
WIRE -672 -1088 -672 -1136
WIRE -672 -1008 -672 -1024
WIRE -1056 -976 -1056 -1008
WIRE -1040 -832 -1056 -832
WIRE -832 -832 -1040 -832
WIRE -672 -832 -752 -832
WIRE -608 -832 -672 -832
WIRE -576 -832 -608 -832
WIRE -1056 -784 -1056 -832
WIRE -672 -784 -672 -832
WIRE -672 -704 -672 -720
WIRE -1056 -672 -1056 -704
WIRE -336 -640 -448 -640
WIRE -208 -640 -336 -640
WIRE -336 -624 -336 -640
WIRE -16 -576 -16 -608
WIRE -448 -560 -448 -640
WIRE -1040 -528 -1056 -528
WIRE -832 -528 -1040 -528
WIRE -672 -528 -752 -528
WIRE -608 -528 -672 -528
WIRE -576 -528 -608 -528
WIRE -336 -528 -336 -544
WIRE 80 -496 80 -528
WIRE -1056 -480 -1056 -528
WIRE -672 -480 -672 -528
WIRE -448 -432 -448 -496
WIRE -384 -432 -448 -432
WIRE -336 -432 -336 -448
WIRE -336 -432 -384 -432
WIRE -672 -400 -672 -416
WIRE -384 -400 -384 -432
WIRE -208 -384 -208 -640
WIRE -208 -384 -240 -384
WIRE -16 -384 -16 -496
WIRE 32 -384 -16 -384
WIRE -1056 -368 -1056 -400
WIRE -240 -352 -240 -384
WIRE -208 -352 -208 -384
WIRE -16 -352 -16 -384
WIRE 32 -352 32 -384
WIRE 80 -352 80 -416
WIRE -352 -336 -432 -336
WIRE -352 -304 -432 -304
WIRE -352 -272 -432 -272
WIRE 256 -256 160 -256
WIRE 624 -256 256 -256
WIRE -352 -240 -432 -240
WIRE 624 -240 624 -256
WIRE -1040 -224 -1056 -224
WIRE -832 -224 -1040 -224
WIRE -672 -224 -752 -224
WIRE -608 -224 -672 -224
WIRE -576 -224 -608 -224
WIRE 256 -224 160 -224
WIRE 432 -224 256 -224
WIRE -352 -208 -432 -208
WIRE 432 -192 432 -224
WIRE -1056 -176 -1056 -224
WIRE -672 -176 -672 -224
WIRE -352 -176 -432 -176
WIRE -352 -144 -432 -144
WIRE 224 -144 160 -144
WIRE 288 -144 224 -144
WIRE 624 -144 624 -160
WIRE 224 -128 224 -144
WIRE -352 -112 -432 -112
WIRE -672 -96 -672 -112
WIRE 432 -96 432 -112
WIRE -1056 -64 -1056 -96
WIRE -352 -64 -432 -64
WIRE 224 -48 224 -64
WIRE -352 -32 -480 -32
WIRE 752 -16 688 -16
WIRE -352 0 -432 0
WIRE 480 16 368 16
WIRE -352 32 -384 32
WIRE 224 32 160 32
WIRE 304 32 224 32
WIRE 976 32 928 32
WIRE 1056 32 976 32
WIRE 656 48 368 48
WIRE 752 48 656 48
WIRE 976 48 976 32
WIRE -1040 80 -1056 80
WIRE -832 80 -1040 80
WIRE -672 80 -752 80
WIRE -608 80 -672 80
WIRE -576 80 -608 80
WIRE -96 80 -96 64
WIRE 304 80 304 64
WIRE -1056 128 -1056 80
WIRE -672 128 -672 80
WIRE 752 128 752 112
WIRE 976 128 976 112
WIRE -672 208 -672 192
WIRE -384 224 -384 32
WIRE 752 224 688 224
WIRE -1056 240 -1056 208
WIRE 976 272 928 272
WIRE 1056 272 976 272
WIRE 480 288 480 16
WIRE 656 288 480 288
WIRE 752 288 656 288
WIRE 976 288 976 272
WIRE -384 320 -384 304
WIRE -432 352 -432 0
WIRE 752 368 752 352
WIRE 976 368 976 352
WIRE -1040 384 -1056 384
WIRE -832 384 -1040 384
WIRE -672 384 -752 384
WIRE -608 384 -672 384
WIRE -576 384 -608 384
WIRE -1056 432 -1056 384
WIRE -672 432 -672 384
WIRE -432 448 -432 432
WIRE -480 480 -480 -32
WIRE -672 512 -672 496
WIRE -1056 544 -1056 512
WIRE -480 592 -480 560
WIRE -1040 688 -1056 688
WIRE -832 688 -1040 688
WIRE -672 688 -752 688
WIRE -608 688 -672 688
WIRE -576 688 -608 688
WIRE -1056 736 -1056 688
WIRE -672 736 -672 688
WIRE -672 816 -672 800
WIRE -1056 848 -1056 816
WIRE -1040 992 -1056 992
WIRE -832 992 -1040 992
WIRE -672 992 -752 992
WIRE -608 992 -672 992
WIRE -576 992 -608 992
WIRE -1056 1040 -1056 992
WIRE -672 1040 -672 992
WIRE -672 1120 -672 1104
WIRE -1056 1152 -1056 1120
FLAG 80 -528 0
FLAG -384 -400 0
FLAG 624 -144 0
FLAG 432 -96 0
FLAG 688 -16 vsample
FLAG 656 48 in0_sampled
FLAG 1056 32 vsampled_in0
FLAG 976 128 0
FLAG 224 -48 0
FLAG 688 224 vsample
FLAG 656 288 in1_sampled
FLAG 1056 272 vsampled_in1
FLAG 976 368 0
FLAG -432 -336 IN0
FLAG -432 -304 IN1
FLAG -480 592 0
FLAG -96 80 0
FLAG 256 -224 RESET
FLAG -240 -384 REF
FLAG 256 -256 CNV
FLAG 224 32 CH_OUT0
FLAG 288 -144 vsample
FLAG -16 -608 0
FLAG -432 448 0
FLAG -384 320 0
FLAG -672 1120 0
FLAG -608 992 IN7
FLAG -1040 992 VS7
FLAG -1056 1152 0
FLAG -432 -272 IN2
FLAG -432 -240 IN3
FLAG -432 -208 IN4
FLAG -432 -176 IN5
FLAG -432 -144 IN6
FLAG -432 -112 IN7
FLAG -432 -64 0
FLAG -672 816 0
FLAG -608 688 IN6
FLAG -1040 688 VS6
FLAG -1056 848 0
FLAG -672 512 0
FLAG -608 384 IN5
FLAG -1040 384 VS5
FLAG -1056 544 0
FLAG -672 208 0
FLAG -608 80 IN4
FLAG -1040 80 VS4
FLAG -1056 240 0
FLAG -672 -96 0
FLAG -608 -224 IN3
FLAG -1040 -224 VS3
FLAG -1056 -64 0
FLAG -672 -400 0
FLAG -608 -528 IN2
FLAG -1040 -528 VS2
FLAG -1056 -368 0
FLAG -672 -704 0
FLAG -608 -832 IN1
FLAG -1040 -832 VS1
FLAG -1056 -672 0
FLAG -672 -1008 0
FLAG -608 -1136 IN0
FLAG -1040 -1136 VS0
FLAG -1056 -976 0
FLAG 304 80 0
FLAG 752 128 0
FLAG 752 368 0
SYMBOL voltage 432 -208 R0
SYMATTR InstName V_RESET
SYMATTR Value PULSE(0 1.8 10u 10n 10n 10n 1 1)
SYMBOL voltage -336 -544 R0
SYMATTR InstName V_REF
SYMATTR Value 5
SYMBOL voltage 80 -400 M180
SYMATTR InstName V_VDD
SYMATTR Value 1.8
SYMBOL res -352 -640 R0
SYMATTR InstName RREF
SYMATTR Value 1
SYMBOL cap -464 -560 R0
SYMATTR InstName CREF
SYMATTR Value 1F
SYMBOL voltage 624 -256 R0
SYMATTR Value PULSE(0 1.8 110u 10n 10n 10n {t_cnv})
SYMATTR InstName V_CNV
SYMBOL SpecialFunctions\\sample 832 16 R0
SYMATTR InstName A1
SYMBOL cap 960 48 R0
SYMATTR InstName C2
SYMATTR Value 1p
SYMBOL cap 208 -128 R0
SYMATTR InstName C6
SYMATTR Value 1p
SYMBOL SpecialFunctions\\sample 832 256 R0
SYMATTR InstName A4
SYMBOL cap 960 288 R0
SYMATTR InstName C8
SYMATTR Value 1p
SYMBOL voltage -480 464 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 304 -32 R0
SYMATTR Value td=400n
SYMATTR InstName A3
SYMATTR Value2 trise = 1n
SYMBOL voltage -16 -480 M180
SYMATTR InstName V_AVDD
SYMATTR Value 5
SYMBOL voltage -432 336 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 -384 208 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 -736 976 R90
SYMATTR InstName R4
SYMATTR Value {Rext} noiseless
SYMBOL cap -688 1040 R0
SYMATTR Value {Cext}
SYMATTR InstName C5
SYMBOL voltage -1056 1024 R0
SYMATTR Value 4.8
SYMATTR InstName V4
SYMBOL res -736 672 R90
SYMATTR InstName R9
SYMATTR Value {Rext} noiseless
SYMBOL cap -688 736 R0
SYMATTR Value {Cext}
SYMATTR InstName C12
SYMBOL voltage -1056 720 R0
SYMATTR Value 4.2
SYMATTR InstName V9
SYMBOL res -736 368 R90
SYMATTR InstName R3
SYMATTR Value {Rext} noiseless
SYMBOL cap -688 432 R0
SYMATTR Value {Cext}
SYMATTR InstName C4
SYMBOL voltage -1056 416 R0
SYMATTR Value 3.6
SYMATTR InstName V3
SYMBOL res -736 64 R90
SYMATTR InstName R10
SYMATTR Value {Rext} noiseless
SYMBOL cap -688 128 R0
SYMATTR Value {Cext}
SYMATTR InstName C13
SYMBOL voltage -1056 112 R0
SYMATTR Value 3
SYMATTR InstName V10
SYMBOL res -736 -240 R90
SYMATTR InstName R11
SYMATTR Value {Rext} noiseless
SYMBOL cap -688 -176 R0
SYMATTR Value {Cext}
SYMATTR InstName C14
SYMBOL voltage -1056 -192 R0
SYMATTR Value 2.4
SYMATTR InstName V11
SYMBOL res -736 -544 R90
SYMATTR InstName R12
SYMATTR Value {Rext} noiseless
SYMBOL cap -688 -480 R0
SYMATTR Value {Cext}
SYMATTR InstName C15
SYMBOL voltage -1056 -496 R0
SYMATTR Value 1.8
SYMATTR InstName V12
SYMBOL res -736 -848 R90
SYMATTR InstName R13
SYMATTR Value {Rext} noiseless
SYMBOL cap -688 -784 R0
SYMATTR Value {Cext}
SYMATTR InstName C16
SYMBOL voltage -1056 -800 R0
SYMATTR Value 1.2
SYMATTR InstName V13
SYMBOL res -736 -1152 R90
SYMATTR InstName R14
SYMATTR Value {Rext} noiseless
SYMBOL cap -688 -1088 R0
SYMATTR Value {Cext}
SYMATTR InstName C17
SYMBOL voltage -1056 -1104 R0
SYMATTR Value 0.6
SYMATTR InstName V14
SYMBOL AD4698 -272 -64 R0
SYMATTR InstName U1