LTSpice: Slow on noise sims with foreign opamps

If you want to play with TI psrts perhaps try the free TI spice program "TINA"

Usually if spice is choking, there is something wrong with the circuit. Now you can't float single nodes in spice, but you can have nets that should be tied to something that might be floating.

I would look carefully at the connectivity of the subcircuit.

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input

guys.

degree

LTSpice.

Well, I don't want to learn a new CAD everytime a vendor thinks they absolutely have to boil their own proprietary broth. The stuff I do with it often gets to be complicated and that would take a long learning curve every time.

See...

anymore)

input

gives

No

guys.

degree

LTSpice.

Nope. It means that it DID find the OPerating point.

You probably don't have the .AC set up properly. I've just posted another pass. ...Jim Thompson

anymore)

input

gives

No

guys.

degree

LTSpice.

But no workie.

So how come other opamp model work fine with exactly the same setup?

That's what I get with the other opamps (in my case nV/rtHz because that's what I want). I guess the model works in PSpice but for some reason it doesn't in LTSpice

Parasitics not properly included in the faulty engine?

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in

stepping

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input

gives

No

hands-on guys.

degree

included

LTSpice.

Hey Joerg, are you the Bear of spice ?-)

I am not sure many know just how funny that is.

Ursus simulatorus? :-)

anymore)

in

stepping

ballpark

input

gives

No

hands-on guys.

degree

included

LTSpice.

Ya got the set-up wrong. ...Jim Thompson

I'm still betting there's two possibilities... pin order wrong, or .AC set-up wrong. ...Jim Thompson

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hands-on guys.

degree

included

case,

in

LTSpice.

V1.

V2.

That doesn't explain why the other opamps work just fine.

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stepping

ballpark

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take a

before. No

hands-on guys.

degree

included

not

case,

in

LTSpice.

V1.

V2.

Show me the setups... maybe the pin order is doing you in? ...Jim Thompson

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take a

of a

before. No

hands-on guys.

degree

as

ID#

with

included

not

case,

in

on

LTSpice.

rearrangement

V1.

V2.

Looks like LTspice order, for OpAmp2 symbol is...

IN+ IN- V+ V- Vout ...Jim Thompson

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opamp in

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constellations, input

what gives

take a

of a

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hands-on guys.

one degree

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ID#

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included

because

not

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on

fit LTSpice.

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rearrangement

V1.

V2.

not?

Hmm, the OPA model is -IN +IN V- V+ Vout.

Is that customary at TI, or in the old Burr-Brown world? If so the I should make a OpAmp2TI or something.

Looks like pin order (the one you initially suggested as well as the one the OPA model has), thanks for the hint.

But now SWMBO wants me to start the barbecue. Pizza over charcoal, in the Weber, yummmm. With lots of Jalapenos on there. Those burn twice ...