Electronics > Beginners
LM358 from LT? (crossreference for an LTSpice simulation)
RoGeorge:
What would be a Linear Technology OpAmp equivalent for LM358, please? I am not familiar with their ICs.
I need to simulate a LM358 filter (1st OpAmp) + some logarithmic amplifier (2nd OpAmp), at less than 10Hz but with some capacitive loads. For now, the physical LM358 circuit tends to self-oscilate, but only sometimes.
A model of OpAmp already existing in the default LTSpice libraries would be great, but I wouldn't mind a 3rd party LM358 model as long as it's free.
Ian.M:
For a first cut at it, use 'Opamps\UniversalOpamp2' with appropriate instance parameters to match your OPAMP's characteristics - see "LTspiceXVII\examples\Educational\UniversalOpamp2.asc" for details.
There used to be a LM358.mod model file on the LTspice Yahoo group files area (now defunkt due to Yahoo), you could try looking for. Use it with the 'Opamps\opamp2' symbol. If you cant find it anywhere else, its probably on the replacement group: https://groups.io/g/LTspice (registration required).
T3sl4co1l:
LT1013 or thereabouts, I suppose.
Obviously, it significantly outperforms the LM358...
Tim
RoGeorge:
Will try, thank you.
For now I am using LT1006, and it doesn't oscillate like the physical circuit does. I'll just redo the existing shoddy design to get rid of the capacitive load.
nrxnrx:
The ltspice yahoo group moved to https://groups.io/g/LTspice (along with the models).
https://groups.io/g/LTspice/filessearch?q=358 brings up a lot of models, so I won't attach. You need to make an account and join the group to access the files, but now it's instant - you don't need to wait a day for a person to approve you. You can disable emails, so you can just join for the files.
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