This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TINA/Spice/OPA2132: Convergence Problem

Part Number: OPA2132
Other Parts Discussed in Thread: TINA-TI, , OPA132

Tool/software: TINA-TI or Spice Models

Hi

I have multiple convergence problems in TINA TI related to the OPA2132 model from TI.

I reports convergence problems in DE, DC

I am trying to run a temperature simulation on a circuit between -40 to +85 deg C using 3 points.

As the model is encrypted are there some standard setting s in the simulator to overcome this problem and get the simulation moving?

Thanks in advance

Best regards

jpe27

  • jpe27,

    Could you provide the .TSC file that is giving you the issues?

    TINA-TI has an example circuit for the OPA2132 in the Open Examples...TI Test Circuits directory. You could check the simulation parameters there for any guidance.

    I would also note that the TINA-TI model is not encrypted and does not have any temperature dependence built into the model.

  • Britt

    thanks very much for your reply.
    I took the suggestion of using the OPA132 test circuit and using the simulation analysis parameters and now my circuit converges and runs.

    However, if the model of the OP Amp has no temperature dependence, what is the best way of evaluating device performance in TINA TI over a temperature range? I can view the spice macro but I am not familiar with which parameters to vary or the limits. I assume these devices are generated from measurements data, or else the IC design?
     
    I can enter temperature dependent characteristics for other components, but if the model does not vary with temperature then the simulation is not truly accurate. I mean I can only model the variation in performance using the external circuit components and not evaluate the amplifier variation as well.

    Thanks in advance.

  • Hello Britt

    any further response to this?

    Thanks in advance.

    Best regards

  • jpe27,

    The models for OpAmps are calibrated to the datasheet typical specs (room temperature). There are no parameters you can tweak to shift it to a different temperature. A different model has to be made for each temperature if needed. You can raise that request with your TI apps or sales contact. The appropriate organization will evaluate the request and schedule the development.

    Thanks,
    JC

  • Thank you JC

    Is there a way contact TI Technical Support directly for this?
    jpe27
  • jpe27,

    If you don't have a contact person to work with, please email support@ti.com.

    Thanks,
    JC

  • Many thanks JC

    Best regards

    jpe27