Electronic – find models for various common op amps for use in LTSpice

circuit analysisltspicemodelingoperational-amplifiersimulation

I have just started using LTSpice. I need to simulate a circuit with op amps, where the parasitic elements of the op amp may effect performance. So I need to try different 'real' op amps to see which on is best.

Is there a source of commonly available op amp models like TL074 or LM324

Best Answer

From the manufacturers. For example TL074 spice model

Be aware there are sometimes problems with manufacture's spice files. I have found that they sometimes use node zero in parts of the internal circuit. This result of this is that the model works fine unless you supply it from power rails at a potential far removed from your circuit ground. Also you sometimes need to do a little bit of translating of p-spice specific syntax.