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OPA388: failed to find DC operating point for AC analysis with OPA388 third party OpAmp?

tarik Tec
Intellectual 600 points
Part Number: OPA388

Hello,

I have now imported succesfully and OPA 2388 Opamp into my LTspice. Howver each time I run it , never reaches the DC operating point!!

DCpointFailer.zip

  • 0
    Guru 48395 points

    That sounds like a question for the LTSpice support team. Have you tried it in TINA? 

    Sometimes you can change your integration method (usually Gear to Trapezoidal or vice versa) to get convergence. There is also a setup term of min conductance on a node that can be adjusted up that sometimes helps. 

  • 0 in reply to Michael Steffes
    TI__Guru* 76781 points

    Hi Tarik,

    I am able to run your file after slight modification without issues. 

    Please make sure that your OPA388.txt is renamed as OPA388.lib, which it has to be in the default search path. BTW, the opa388.lib file is copied directly from TI website, https://www.ti.com/product/OPA388/toolssoftware. I do not know why you changed to *.txt  extension. 

    If you still have issues, please send me a private message via E2E forum. 

    Best,

    Raymond