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TINA/Spice/OPA333: Unable to simulate AC analysis

JAYARAMA KAPIL SRIDHARA
Prodigy 110 points
Part Number: OPA333
Other Parts Discussed in Thread: TINA-TI

Tool/software: TINA-TI or Spice Models

Hello I am unable to simulate AC analsis for the attached circuit , Please help me out.

The low pass filter connected to the Instrumentation amplifier has cutoff frequency of 40Hz

Thanks

Noname1.TSC

  • 0
    TI__Expert 5850 points

    Hello Jayarama,
     
    The issue has to do with TINATI considering C3 as floating.  To overcome this you can either delete C3 and probe at the output of the opamp or attach a resistive load to ground in between C3 and VF1.
     
    Best regards,

    Errol Leon
    Texas Instruments
    Precision Op Amp Applications