I'm trying to model a circut containing the AD734 in LTSpice.
Analog Devices offers a Spice model, and I've used LTSpice's automatic symbol generation to produce a symbol, and renamed - but not renumbered - the pins.
Version 4 SHEET 1 2708 1816 WIRE -1904 -304 -2080 -304 WIRE -912 -304 -1904 -304 WIRE -2080 -256 -2080 -304 WIRE -1072 -208 -1776 -208 WIRE -912 -208 -912 -304 WIRE -912 -208 -960 -208 WIRE -1072 -176 -1216 -176 WIRE -1776 -144 -1776 -208 WIRE -1216 -144 -1216 -176 WIRE -1072 -144 -1216 -144 WIRE -672 -144 -960 -144 WIRE -1216 -112 -1216 -144 WIRE -1072 -112 -1216 -112 WIRE -944 -112 -960 -112 WIRE -1216 -80 -1216 -112 WIRE -1072 -80 -1216 -80 WIRE -944 -80 -944 -112 WIRE -944 -80 -960 -80 WIRE -864 -80 -944 -80 WIRE -720 -80 -784 -80 WIRE -672 -80 -672 -144 WIRE -672 -80 -720 -80 WIRE -1472 -48 -1632 -48 WIRE -1072 -48 -1472 -48 WIRE -1072 -16 -1120 -16 WIRE -912 -16 -960 -16 WIRE -1632 64 -1632 -48 WIRE -1904 112 -1904 -304 WIRE -672 144 -672 -80 WIRE -2080 432 -2080 -176 WIRE -2000 432 -2080 432 WIRE -1952 432 -2000 432 WIRE -1904 432 -1904 176 WIRE -1904 432 -1952 432 WIRE -1776 432 -1776 -64 WIRE -1776 432 -1904 432 WIRE -1632 432 -1632 144 WIRE -1632 432 -1776 432 WIRE -1216 432 -1216 -80 WIRE -1216 432 -1632 432 WIRE -1120 432 -1120 -16 WIRE -1120 432 -1216 432 WIRE -672 432 -672 224 WIRE -672 432 -1120 432 WIRE -2000 464 -2000 432 WIRE -2080 544 -2080 432 WIRE -1952 592 -1952 432 WIRE -2080 736 -2080 624 WIRE -1952 736 -1952 656 WIRE -1952 736 -2080 736 WIRE -912 736 -912 -16 WIRE -912 736 -1952 736 FLAG -2000 464 0 FLAG -720 -80 Vout FLAG -1472 -48 Vin SYMBOL voltage -2080 -272 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 132 Left 2 SYMATTR SpiceLine Rser=0.001 SYMATTR InstName V1 SYMATTR Value 15 SYMBOL voltage -2080 528 R0 WINDOW 123 0 0 Left 2 WINDOW 39 -144 137 Left 2 WINDOW 0 -60 1 Left 2 WINDOW 3 -57 90 Left 2 SYMATTR SpiceLine Rser=0.001 SYMATTR InstName V2 SYMATTR Value 15 SYMBOL cap -1920 112 R0 SYMATTR InstName C2 SYMATTR Value 100n SYMATTR SpiceLine Rser=0.1 Lser=1n SYMBOL cap -1968 592 R0 WINDOW 0 -46 10 Left 2 SYMATTR InstName C10 SYMATTR Value 100n SYMATTR SpiceLine Rser=0.1 Lser=1n SYMBOL AutoGenerated\\AD734 -1024 -112 R0 SYMATTR InstName U2 SYMBOL res -768 -96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 250 SYMBOL voltage -1632 48 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value SINE(0 1 16k 0 0 0 10) SYMBOL res -688 128 R0 SYMATTR InstName R2 SYMATTR Value 1250 SYMBOL voltage -1776 -160 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V4 SYMATTR Value 1 TEXT -1632 504 Left 2 !.tran 0 1.4m 0 TEXT -1624 536 Left 2 !.options tseed=10n TEXT -1624 568 Left 2 !.options method=gear\n.options trtol=7 TEXT -1632 632 Left 2 !.options cshunt=7e-15
This apparently came up last year - 04-04-2010 - and Helmut Sennewal apparently sorted out JosephKK.
My test circuit runs for about 18 microsecond, then goes beserk, with the output voltage falling below -100V and the +/-15V supply voltages dropping abruptly at the same time.
The AD734.cir file from Analog Devices is dated 1992, and loooks exactly the same as the one Josephkk posted.
Is there any way to get it to work?
-- Bill Sloman, Nijmegen