Help with 3rd party opamp (opa2992)

wedge · July 12, 2024, 6:51pm

It seems as if I need help again: spice model was downloaded from TI website.

Creating an auto generated part in ltspice works at a first glance. Simulation runs, so I would consider the model as working fine.

However doing in import in qspice causes much trouble for me. I copy/paste the content of the txt file into the editor and qspice asks me if I want to create a symbol for opa2992.
Include the whole file is checked, because there are other subckt in this file which are used and get an error: “Fatal error: No analysis command found. You need to add a SPICE directive such as “.tran 5m”, which will simulate five milliseconds of data.” However .tran 10m is clearly invoked.

Any advice what I might be doing wrong?

Thank you!

RDunn · July 12, 2024, 7:19pm

Hi, wedge.

I think that you have a .end in the netlist before the end of the netlist.

I’m sure that there’s an easier way but what I did was open the symbol browser, click on the “Library File”, and remove the “.end” from the tail of the text. It ran without problems after that.

–robert

wedge · July 12, 2024, 7:31pm

Thanks RDunn that did the trick. Works perfectly now.

RDunn · July 12, 2024, 7:57pm

I’m sure that @KSKelvin has covered a better way. Maybe here?

–robert