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OPA693 input capacitance

Overjoyed_Android
Prodigy 205 points
Other Parts Discussed in Thread: OPA693

Hello -

What is the input capacitance on the OPA693.  Need this for the inverting and non-inverting inputs.

  • 0
    TI__Genius 13335 points

    Hello,

    On page 3 of the OPA693 datasheet, the noninverting input impedance is given as 300kΩ || 1.2pF. The input capacitance is typically dominated by the package, so you can assume that the inverting capacitance is going to roughly equal to the non-inverting of 1.2pF. However, keep in mind that the inverting and output nodes are low impedance so any parasitic capacitance is going to have a negligible effect on the system response.

    Regards,
    Luke Lapointe
    High Speed Amplifiers