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THS4531: Recommended Amplifier DC parameter test circuits.

WILLIAM MURLIN
Prodigy 20 points
Part Number: THS4531

Need a test circuit to measure input offset voltage of fully differential amplifiers.

  • 0
    Guru 48395 points

    Hello William, covered a lot of this in this recent article, Incidentally, the THS4531A is the improved DC precision version

    www.planetanalog.com/author.asp

  • 0 in reply to Michael Steffes
    Guru 48395 points

    Also William

    On another thread we were discovering the THS4531a TINA model is a much more recent update - where the much older THS4531 model probably needs to be updated to that with a slight increase in the nominal Vos in the model - these are the same devices with a better spec on the THS4531a offset voltage and more modern characterization flow and modeling. 

    Keep in mind in the models, the DC errors are usually 1sigma of some polarity. on 0 centered errors like offsets, that is a kind of random selection - on unipolar errors like input bias current that is one sided distribution as the input bias current is always out of the input pins. 

    Figure 3 in that article is where the FDA DC error sims start.