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OPA4374: Is there any data (or curves) of closed-loop gain and phase vs frequency of OPA4374?

user6254646
Prodigy 10 points
Part Number: OPA4374

HI, sir, we want to check the closed-loop gain and phase vs frequency of OPA4374. However, only the open-loop curves of them are provided in the data sheet. Can you provide us with these data or tell us how to calculate them?

  • 0
    Guru 47515 points

    Nothing in the datasheet it seems, sometimes there are example plots in the TINA reference design file, and yes, there is one gain of 2 plot there. these very high R's apparently need that 3pF feedback to compensate the pole formed back to the inverting input C

    and the reference design TINA file, you can of course modify this schematic to what you want and see what AC response you get. 

    OPA4374 reference design.TSC

  • Former Member
    0 Former Member

    Hello User,

    Because the number of popular closed-loop configurations for an op amp are too great for a datasheet plot, this information is not always included.  The best way to figure this out is through simulation.  I'd recommend you follow Michael's instructions.  Of course, you can also use the GBW to estimate the curve if you have a simple, resistive gain setup.

    Please let us know if you need any help setting up your simulation(s).

    Regards,

    Daniel