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OPA2387: OPA2387 input bias current matching

Bruce Carlson
Prodigy 70 points

Part Number: OPA2387

Tool/software:

For OPA2387, how much does input bias current vary between two op-amps in a single package?

  • 0
    TI__Guru* 77501 points

    Hi Bruce, 

    Bruce Carlson said:
    For OPA2387, how much does input bias current vary between two op-amps in a single package?

    This is hard to estimate. The datasheet indicates that the max difference at Ios at input should not exceed ±400pA per op amp over temperature. If you double the difference, that may be the worst case over temperature. 

    ±Ib input bias currents suggests that the op-amp have the self-compensation circuit at the input. Typical Ib mismatching at input is approx. ±30pA at room temperature ( ±150pA is the worst case per op amp at 25C). 

    If you have other questions, please let us know. 

    Best,

    Raymond