* SPICE netlist
V5 CNV 0 PULSE(3.3 0 50n 0.1n 0.1n 190n {1/fs})
C1 OUTD 0 10p
C2 OUTC 0 10p
C3 OUTB 0 10p
C4 OUTA 0 10p
V6 VS+ 0 5
XU2 N005 N004 N005 NC_01 NC_02 N006 0 N006 VS+ 0 VS+ 0 VS+ VS+ N002 N002 CNV OUTA OUTB NC_03 N007 NC_04 NC_05 NC_06 NC_07 0 NC_08 NC_09 NC_10 N008 NC_11 NC_12 0 NC_13 NC_14 NC_15 N009 N009 NC_16 NC_17 0 0 NC_18 OUTC OUTD ADAQ4380-4 ;pnba OUTA-)INA2+)INA1+)SJA+)SJA-)INA1-)INA2-)OUTA+)VS+)VS-)REFIN)GND)IN_LDO)EN_LDO)OUT_LDO)VCC)CNV)SDOA)SDOB)OUTB-)INB2+)INB1+)SJB+)SJB-)INB1-)INB2-)OUTB+)OUTC-)INC2+)INC1+)SJC+)SJC-)INC1-)INC2-)OUTC+)OUTD-)IND2+)IND1+)SJD+)SJD-)IND1-)IND2-)OUTD+)SDOC)SDOD
XU1 IN_A N004 V+ V- N004 LT1357 ;pnba In+)In-)V+)V-)OUT
V7 V- 0 -15
V8 V+ 0 15
XU3 IN_B N007 V+ V- N007 LT1357 ;pnba In+)In-)V+)V-)OUT
V2 IN_B 0 SINE(0 5.5 20k) AC 1
XU4 IN_C N008 V+ V- N008 LT1357 ;pnba In+)In-)V+)V-)OUT
V9 IN_C 0 SINE(0 3.3 20k) AC 1
XU5 IN_D N009 V+ V- N009 LT1357 ;pnba In+)In-)V+)V-)OUT
V4 IN_D 0 SINE(0 2.06 20k) AC 1
XU6 mux_ctrl1 V+ V- N001 N003 NC_19 NC_20 IN_A NC_21 NC_22 NC_23 NC_24 V+ 0 0 0 ADG1208 ;pnba A0)EN)Vss)S1)S2)S3)S4)D)S8)S7)S6)S5)Vdd)GND)A2)A1
V1 N003 0 -10
V3 N001 0 10
V10 mux_ctrl1 0 PULSE(0 3 0 1n 1n 0.5u 1u)
.param fs 4e6
.noise V(OUTA) V1 dec 201 1 1g

* LTspice schematic (.asc)
Version 4
SHEET 1 3296 2160
WIRE -1376 -1048 -1376 -1080
WIRE -1184 -1048 -1184 -1080
WIRE -976 -1048 -976 -1080
WIRE -1376 -936 -1376 -968
WIRE -1184 -936 -1184 -968
WIRE -976 -936 -976 -968
WIRE -48 -696 -96 -696
WIRE 272 -696 -48 -696
WIRE 912 -696 272 -696
WIRE 1136 -696 912 -696
WIRE -48 -568 -48 -696
WIRE 272 -568 272 -696
WIRE 912 -568 912 -696
WIRE 1136 -568 1136 -696
WIRE -1264 -520 -1264 -568
WIRE -1392 -456 -1648 -456
WIRE 1344 -424 1264 -424
WIRE -1648 -408 -1648 -456
WIRE -1392 -392 -1536 -392
WIRE -1536 -344 -1536 -392
WIRE -480 -344 -640 -344
WIRE -272 -312 -304 -312
WIRE -1648 -296 -1648 -328
WIRE -560 -280 -560 -296
WIRE -304 -280 -304 -312
WIRE -272 -280 -304 -280
WIRE 1344 -280 1344 -424
WIRE 1344 -280 1264 -280
WIRE -640 -264 -640 -344
WIRE -592 -264 -640 -264
WIRE -480 -248 -480 -344
WIRE -480 -248 -528 -248
WIRE -272 -248 -480 -248
WIRE -1536 -232 -1536 -264
WIRE -704 -232 -1136 -232
WIRE -592 -232 -704 -232
WIRE -560 -200 -560 -216
WIRE -272 -120 -352 -120
WIRE -272 -88 -304 -88
WIRE -304 -56 -304 -88
WIRE -272 -56 -304 -56
WIRE -480 -40 -640 -40
WIRE -560 24 -560 8
WIRE -640 40 -640 -40
WIRE -592 40 -640 40
WIRE -1472 56 -1536 56
WIRE -1392 56 -1472 56
WIRE -1088 56 -1136 56
WIRE -480 56 -480 -40
WIRE -480 56 -528 56
WIRE -272 56 -480 56
WIRE -704 72 -784 72
WIRE -592 72 -704 72
WIRE -1536 104 -1536 56
WIRE -784 104 -784 72
WIRE -560 104 -560 88
WIRE -1392 120 -1456 120
WIRE -1456 184 -1456 120
WIRE -1392 184 -1456 184
WIRE -272 184 -352 184
WIRE 1600 184 1264 184
WIRE 1648 184 1600 184
WIRE -784 200 -784 184
WIRE -1536 232 -1536 184
WIRE -1456 232 -1456 184
WIRE -480 232 -640 232
WIRE 1520 232 1264 232
WIRE 1568 232 1520 232
WIRE 1648 232 1648 184
WIRE -1328 264 -1328 232
WIRE -1200 280 -1200 232
WIRE 1440 280 1264 280
WIRE 1488 280 1440 280
WIRE 1568 280 1568 232
WIRE -560 296 -560 280
WIRE -640 312 -640 232
WIRE -592 312 -640 312
WIRE -480 328 -480 232
WIRE -480 328 -528 328
WIRE -272 328 -480 328
WIRE 1360 328 1264 328
WIRE 1408 328 1360 328
WIRE 1488 328 1488 280
WIRE 1648 328 1648 296
WIRE -704 344 -784 344
WIRE -592 344 -704 344
WIRE -784 376 -784 344
WIRE -560 376 -560 360
WIRE 1296 376 1264 376
WIRE 1328 376 1296 376
WIRE 1408 376 1408 328
WIRE 1568 376 1568 344
WIRE 1488 424 1488 392
WIRE 1328 456 1328 376
WIRE -784 472 -784 456
WIRE 1408 472 1408 440
WIRE -272 520 -352 520
WIRE -480 568 -640 568
WIRE 1328 584 1328 536
WIRE -560 632 -560 616
WIRE -272 632 -304 632
WIRE -640 648 -640 568
WIRE -592 648 -640 648
WIRE -480 664 -480 568
WIRE -480 664 -528 664
WIRE -304 664 -304 632
WIRE -304 664 -480 664
WIRE -272 664 -304 664
WIRE -704 680 -784 680
WIRE -592 680 -704 680
WIRE -784 712 -784 680
WIRE -560 712 -560 696
WIRE -304 792 -352 792
WIRE -272 792 -304 792
WIRE -784 808 -784 792
WIRE -304 824 -304 792
WIRE -272 824 -304 824
WIRE -48 1048 -48 1000
WIRE 192 1048 192 1000
WIRE 192 1048 -48 1048
WIRE -48 1080 -48 1048
FLAG -48 1080 0
FLAG 1328 584 0
FLAG 1408 472 0
FLAG 1360 328 OUTD
FLAG 1488 424 0
FLAG 1440 280 OUTC
FLAG 1568 376 0
FLAG 1648 328 0
FLAG 1600 184 OUTA
FLAG 1520 232 OUTB
FLAG -96 -696 VS+
FLAG 1296 376 CNV
FLAG -976 -936 0
FLAG -704 -232 IN_A
FLAG -704 72 IN_B
FLAG -352 -120 0
FLAG -1184 -936 0
FLAG -1184 -1080 V-
FLAG -1376 -936 0
FLAG -1376 -1080 V+
FLAG -560 -296 V+
FLAG -560 -200 V-
FLAG -560 8 V+
FLAG -560 104 V-
FLAG -784 200 0
FLAG -352 184 0
FLAG -352 520 0
FLAG -704 344 IN_C
FLAG -560 280 V+
FLAG -560 376 V-
FLAG -784 472 0
FLAG -352 792 0
FLAG -704 680 IN_D
FLAG -560 616 V+
FLAG -560 712 V-
FLAG -784 808 0
FLAG -1200 280 0
FLAG -1328 264 V-
FLAG -1088 56 V+
FLAG -1264 -568 V+
FLAG -1536 -232 0
FLAG -1648 -296 0
FLAG -1456 232 0
FLAG -1536 232 0
FLAG -1472 56 mux_ctrl1
FLAG -976 -1080 VS+
SYMBOL voltage 1328 440 R0
SYMATTR Value PULSE(3.3 0 50n 0.1n 0.1n 190n {1/fs})
SYMATTR InstName V5
SYMBOL cap 1392 376 R0
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL cap 1472 328 R0
SYMATTR InstName C2
SYMATTR Value 10p
SYMBOL cap 1552 280 R0
SYMATTR InstName C3
SYMATTR Value 10p
SYMBOL cap 1632 232 R0
SYMATTR InstName C4
SYMATTR Value 10p
SYMBOL voltage -976 -1064 R0
SYMATTR InstName V6
SYMATTR Value 5
SYMBOL ADC\\ADAQ4380-4 512 248 R0
SYMATTR InstName U2
SYMBOL OpAmps\\LT1359 -560 -312 R0
SYMATTR InstName U1
SYMBOL voltage -1184 -1064 R0
SYMATTR InstName V7
SYMATTR Value -15
SYMBOL voltage -1376 -1064 R0
SYMATTR InstName V8
SYMATTR Value 15
SYMBOL OpAmps\\LT1359 -560 -8 R0
SYMATTR InstName U3
SYMBOL voltage -784 88 M0
SYMATTR InstName V2
SYMATTR Value2 AC 1
SYMATTR Value SINE(0 5.5 20k)
SYMBOL OpAmps\\LT1359 -560 264 R0
SYMATTR InstName U4
SYMBOL voltage -784 360 M0
SYMATTR InstName V9
SYMATTR Value2 AC 1
SYMATTR Value SINE(0 3.3 20k)
SYMBOL OpAmps\\LT1359 -560 600 R0
SYMATTR InstName U5
SYMBOL voltage -784 696 M0
SYMATTR InstName V4
SYMATTR Value2 AC 1
SYMATTR Value SINE(0 2.06 20k)
SYMBOL Switches\\ADG1208 -1264 -200 R0
SYMATTR InstName U6
SYMBOL voltage -1536 -360 R0
SYMATTR InstName V1
SYMATTR Value -10
SYMBOL voltage -1648 -424 R0
SYMATTR InstName V3
SYMATTR Value 10
SYMBOL voltage -1536 88 M0
SYMATTR InstName V10
SYMATTR Value PULSE(0 3 0 1n 1n 0.5u 1u)