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Error with LMH6714 PSPICE Model in TINA-TI

S.Satoshi
Guru 21675 points
Other Parts Discussed in Thread: LMH6714, TINA-TI

Hi,

Now I'm trying to simulate with LMH6714 PSPICE model in TINA-TI but I'm facing error. And so I replaced LMH6714 model to normal OPAMP model then transient simulation was done with no error. Can you check attached both file and let me know what's problem.

TINA-TI sim_LMH6714.TSC

TINA-TI sim_normal OPAMP.TSC

Best Regards,

Sonoki / Japan Disty

  • 0
    TI__Mastermind 41310 points

    Sonoki-san,

    I am assuming that you are trying to run a transient simulation. If that is not the case, please let us know. You can usually solve convergence issues by modifying the simulation parameters in TINA-TI. In this case, there is only one parameter I needed to change to get the simulation to converge:

    Convergence errors are part of using a simulator. There is no exact way to tell you how to solve them as they change from circuit to circuit and model to model. I cannot tell you why the other circuit converges with a different set of parameters, other than the fact that the simulator satisfied the requirements for convergence in one case and did not in another.

  • 0 in reply to Britt Brooks - Online Design Tools
    Guru 21675 points
    Hi Britt,

    Thank you for your comment. Yes, I'm trying to run a transient simulation.
    Can you please let me know how to open that window to change the parameter?

    Best Regards,
    Sonoki
  • 0 in reply to S.Satoshi
    TI__Mastermind 41310 points

    Sonoki-san,

    Use the Analysis-->Set Analysis Parameters... option.

    If the short version of the list appears, click on the Hand icon and select View All

    You should then see all of the simulation parameters available for you to use.

  • 0 in reply to Britt Brooks - Online Design Tools
    Guru 21675 points

    Hi Britt,

    Please kindly let me ask about TR max. iteration number again.

    • What does TR max. iteration number mean?
    • What effect is given when this value is increased at transient simulation?

    Best Regards,

    Sonoki

  • 0 in reply to S.Satoshi
    TI__Mastermind 41310 points

    Sonoki-san,

    The TR max iterations value tells the simulator how many times to try to find a solution at a given time point before stopping. In order to find a solution, the simulator must meet certain criteria required for convergence. In this case, the simulator need more time (or effort) to find the solution that met the specified requirements. By increasing the value, you will be essentially slowing down the overall simulation, since each time point may now take a little longer to solve in order to meet the convergence criteria.

    Simulation is a trade off between accuracy and time. The less accurate the solution, the quicker the simulation and vice-versa. Please remember that any simulator is basically a linear equations solver trying to solve many very non-linear dependencies. Any time iterations are increased to get a solution, the time must also increase.