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OPA551 - Question on intrinsic output impedance (Z0)

Brian Gosselin
Expert 4575 points
Other Parts Discussed in Thread: OPA551

Hi team,

What's the intrinsic output impedance (Z0) for the OPA551?  I can't locate it in the datasheet.

Regards,
Brian Gosselin

  • 0
    TI__Guru 60570 points

    Brian,

    I have simulated the OPA551 open-loop output impedance (see below); it's around 18ohm across most of the frequency range. Of course, it's only as good as the macro-model itself but should be pretty close to the actual value.