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OPA192: Map to model in Autodesk Eagle for OPA192

SJ Ki
Prodigy 30 points
Part Number: OPA192

Hi all,

I am now trying to simulate the OPA192.

And I build the circuit using Eagle S/W (Our in-campus pcb circuit fabrication tool only accepts Eagle. So it's unchangeable) and I am having trouble in mapping the OPA192 component.

Eagle requires .mdl file to upload the subcircuit model.

Please advise me if anyone knows the solution to this.

Thanks

Best

SJ

  • 0
    TI__Guru* 93105 points

    Hello SJ,

    The two simulators that we use are PSpice for TI and TINA TI, both of which are PSpice compatible PSpice simulators. We build our simulation models, including the OPA192 precision op amp model, as PSpice models.

    When I searched on line to learn about the Eagle Autodesk simulation tool and its compatibility with PSpice it states on their web site "SPICE is fully integrated into Autodesk EAGLE 8.4, and there's no need to install any additional software." I see that among several semiconductor manufacturers that TI is listed as having models usable with the simulator so certainly there is some levels of compatibility. 

    You mention, "Eagle requires .mdl file to upload the subcircuit model." Almost assuredly .mdl stands for "model file." Often with simulators it is just a matter of changing the model simulation file's extension to that required by the particular simulator. Try going out to the OPA192 TI web page and under Design & Development > Design tools & simulation, select the SIMULATION MODEL. Then once that is open select the OPA192.LIB file and save it somewhere on your machine where you can access it. Try changing the extension from .LIB to .mdl, save it and then use that renamed file when you attempt to run a simulation with Eagle Autodesk. Do note that you will have needed to associate an op amp symbol the OPA192 op amp model as is the norm for any simulator I have used.

    Regards, Thomas

    Precision Amplifiers Applications Engineering

  • 0
    TI__Guru 54111 points

    Hi SJ,

    I am not familiar with Eagle tool. However, we may be able to convert OPA192's macro model into Spice netlist file, *.CIR, where you may be able import the netlist file into Eagle simulation tool. 

    OPA192 REFERENCE DESIGN 04262021.CIR

    https://www.youtube.com/watch?v=QE7jUcWWi5M

    If you have additional questions, please let us know. 

    Best,

    Raymond

  • 0 in reply to Thomas Kuehl
    Prodigy 30 points

    Hello Thomas,

    That actually worked, however, not fully worked.

    There was an error message

    "Part G1 cannot be simulated."

    Do you know how I can correct it?

    Thanks

    Best

    SJ

  • 0 in reply to Raymond Zhang1
    Prodigy 30 points

    Hello Raymond,

    As same error as above mentioned reply.

    I encountered Part E1 cannot be simulated error.

    E1 VOS+ VOS- VALUE = [...]

    I think E1 value in this equation did not work well.

    Do you know how I can troubleshoot it?

    Thanks

    Best

    SJ

  • 0 in reply to SJ Ki
    TI__Guru* 93105 points

    Hi SJ,

    Pspice has a number of controlled sources that it can utilize in models and assigns a particular first letter in the source's naming. "G" is a voltage-controlled current source, and "E" is for a voltage-controlled voltage source. Have a look at the following PSpice information:

    https://www.pspice.com/source/controlled-sources

    The OPA192 model uses "G1" as the name of one of its voltage-controlled current sources. I found three instances of it used in the OPA192 model. This kind of source is fundamental to PSpice models as well as the other sources it provides. There may be some compatibility issue using "G" for such sources in Eagle Autodesk, but that would be odd because the software is supposed to be PSpice compatible.

    Check the manual for Eagle Autodesk and see if it supports the use of "G" as the designator for a voltage-controlled current source. It may require some different designator. If that is the case, you would need to change the "G" to whatever Eagle Autodesk requires for that controlled source at each instance of its occurrence in the model. You would use a text editor to make the changes.

    My suggestion is you contact Eagle Autodesk help resources, which might be similar to TI's e2e forums and explain the issues you are having with the controlled source designations. Since they indicate their product is PSpice compatible they should be able to help you resolve the issues. 

    Regards, Thomas

    Precision Amplifiers Applications Engineering