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OPA2376: Input Impedance

Joshua Rowe
Prodigy 20 points
Part Number: OPA2376
Other Parts Discussed in Thread: OPA376

Hi,

I'm designing a multi stage amplifier circuit using the OPA2376 and noticed there inst an input impedance listed on the data sheet. Where can I find the input impedance value?

Best,

Josh 

  • 0
    TI__Genius 15480 points
    Hi Josh,
    The OPA2376 datasheet does specify an input capacitance in the Electrical Characteristics table on page 8 of the datasheet. It doesn't appear we specify an input resistance there though. For a CMOS op amp such as OPA376, this input resistance is typically very high - in the hundreds of megaohms of differential input resistance, and teraohms of common-mode input resistance. Looking at the SPICE model, it appears the OPA376 macromodel models a 1GΩ common-mode input resistance.
  • 0 in reply to Alex Davis
    TI__Genius 11135 points
    Josh

    We haven't heard back from you so we assume this answered your question. I you need more help just post another reply.

    Thanks
    Dennis