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LT Spice (mild) Criticism

R

Roy McCammon

Jan 1, 1970
0
Not actually a problem with the software, but rather the included
op-amp libraries. There are numerous op-amp models using some sort
of unreadable encoding (i.e., you cannot see the equivalent spice
net list). I thought that these being LT opamps and the models
coming from LT that they would be exquisitely accurate. I was
disappointed to learn (by experiment) that input capacitance
wasn't included or is very much smaller than the data sheet
specs. No telling what else isn't included.

I noticed this when I optimizing the feedback capacitance
of a high band width inverting configuration. The optimum
value was less than 1fF when it should have been a few pF.

Its easy enough to add the capacitances, but disappointing
never the less and it's ugly.
 
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