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OPA328: Assistance Needed with Transimpedance Model

Deepak Sharma
Prodigy 235 points
Part Number: OPA328
Other Parts Discussed in Thread: OPA3S328,

Tool/software:

Hi Ti,

I'm having trouble identifying the issue with my model, which is set for a lower gain of 500 ohms using the OPA3S328 dual-channel op-amp in a transimpedance configuration, approximated with the OPA328. The Bode plot analysis is not converging.

Could you help me figure this out?

Thanks

Deep

  • 0
    TI__Guru 60641 points

    Hi Sharma,

    Deepak Sharma said:
    Could you help me figure this out?

    The circuit works fine, shown below. 

    The issues are that your V1 can not exceed the supply rail, Vcc.  Or you may use single supply voltage with Vcc = 5Vdc and keep V1= 3Vdc. 

    Best,

    Raymond