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OPA567: distortion on step response graph

Taketo Sato
Genius 10485 points

Part Number: OPA567

Hello team,

I have a question about step response curve of OPA567 datasheet.

There are two step response curves in datasheet p.9 and both show distortion in middle of the rising edge.

What causes the distortion?

It looks like a crossover distortion but looking at the condition, Vs=+5V means single supply condition, so I am confusing what the distortion is.

Best regards,

  • +1
    TI__Genius 12045 points

    Hi Taketo-san,

    You are correct that this is output crossover distortion. This occurs when the output stage switches between sinking and sourcing current, which can happen for any power supply voltage depending on the load reference voltage. It appears that the step response curves were taken with the load referenced to Vs/2 = 2.5V and the output signal crossing over mid-supply. Note that the test conditions in the electrical characteristics section always referenced RL to Vs/2 unless otherwise noted.

    Regards,

    Zach