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OPA551 - Question on intrinsic output impedance (Z0)

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Hi team,

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

Regards,
Brian Gosselin

  • 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.

    Marek Lis, MGTS
    Sr Application Engineer
    Precision Analog - TI Tucson

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