OPA336 Spice model import to PSPICE

Shrenik Vora

Other Parts Discussed in Thread: OPA336

I am trying to use OPA336 spice model in PSpice. I tried to follow instructions given in http://www.ti.com/lit/an/sloa070/sloa070.pdf

I have added the opa336 library to the configuration file as well.

I am getting multiple errors that say

ERROR -- Subcircuit FEMT_0 used by X_U2.XIn12 is undefined
ERROR -- Subcircuit VC_RES_0 used by X_U2.XU7 is undefined
ERROR -- Subcircuit RNOISE_FREE_0 used by X_U2.XR102 is undefined
ERROR -- Subcircuit RNOISE_FREE_0 used by X_U2.XR101 is undefined

There are many more error like the above (X2 is OPA 336). The entire error message is attached.

Does anyone know the potential source of this error?

over 10 years ago

0 Shrenik Vora over 10 years ago

Prodigy 130 points

Sorry, forgot to attach the error file

0 Britt Brooks - Online Design Tools over 10 years ago in reply to Shrenik Vora

TI__Mastermind 41310 points

Shrenik,

You are not getting the included file that contains the subcircuits for the OPA336. Please check the names of the files that your are including and make sure they are present. The file on the web is named OPA336.txt, not .lib and that may be causing you an issue unless you renamed the file.

All of the errors are for missing Subcircuits that are not defined, but all are present in the file on the web.

Britt

0 Shrenik Vora over 10 years ago in reply to Britt Brooks - Online Design Tools

Prodigy 130 points

Hi,

Thanks for the prompt reply. The issue was as per http://www.ti.com/lit/an/sloa070/sloa070.pdf I only ended up importing opa336 and not its subcircuits. I just changed the txt to lib and carried on with create parts for library without importing 336.

The 'subcircuit not found errors' are gone but there seems to be a convergence issue. I am just using a simple inverting amplifier configuration(attached) to make sure the models are working fine. The main error seems to be ERROR -- Convergence problem in bias point calculation. I have also attached the screenshot of the error.

The library that I ended up creating is also attached.

opa336.zip

0 Shrenik Vora over 10 years ago in reply to Shrenik Vora

Prodigy 130 points

Does anyone have any ideas on what is causing the above issue?

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OPA336 Spice model import to PSPICE