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Original question:

OPA552: Looking for low output impedance power amplifier

OPA552: Output Resistance of OPA552

Preetham Y
Prodigy 80 points
Part Number: OPA552
Other Parts Discussed in Thread: OPA551,

I want to know the output resistance (Ro) of this OpAmp

  • 0
    TI__Guru* 93105 points

    Hello Preetham,

    I searched our archives for OPA552 Zo and didn't find it for that op amp. I did find the Zo curve for the OPA551 which is the unity gain stable version of the same amplifier. The OPA552 Zo will be the same at lower frequencies, but I expect it will deviate somewhat at higher frequencies because it is a decompensated version having higher bandwidth than the OPA551.

    The OPA552 is a legacy op amp and it has an older simulation model design. I checked the model and it models Zo as a constant 25 Ohms across frequency.

    This is the extent of Zo information we are able to provide for the OPA552.

    Regards, Thomas

    Precision Amplifiers Applications Engineering