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OPA445: Unity-gain stable

Genius 9880 points
Part Number: OPA445

Hi Team,

A customer is asking if the present OPA445 is still have the unity-gain stable.

Because a 1997 datasheet states that the the OPA445 is unity-gain stable and requires no external compensation components

and the datasheet revised in April 2008 does not mention anything more on this point is it still true or not?

Thank you for your immediate response.

Best Regards,

Maynard

  • Hi,

    that the OPA445 is unity-gain stable can still be seen from the specs:

    See also the figures on page 5 and 7.

    Kai

  • Hi Maynard,

    I checked the simulation, which was updated on 2011. There is a slight Q in the Bode plot, and the loop gain response is shown a pole (slightly) near the unity gain BW. To be safe, I will recommend to put non-populated compensation components in the Op Amp Circuit (just to be safe).  

    The simulation is still shown the similar step responses as follows.   

    Best,

    Raymond 

  • Hi Maynard,

    Kai has thoroughly explained that the OPA445 is unity gain stable. If this takes care of your needs, please close this e2e inquiry.

    Regards, Thomas

    Precision Amplifiers Applications Engineering