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TL331: Looking for Maximum Current Absorbed by Input Pins (IN+ and IN-)

Eric Dj
Expert 4130 points
Part Number: TL331

Team, could you please provide the maximum current absorbed by input pins (IN+ and IN-) over the device operating temperature range? this is an urgent request.

  • 0
    TI__Guru 60426 points

    Hi Eric,

    The maximum input current is specified as -400nA over temp on the datasheet.

    The input current will drop to a few dozen nA at about 1V below V+ as the input stage tail rises above the current sources and all the inputs stages devices BE junctions reverse-bias and turn off. What is left is the junction leakages of the inout stage. Note that the current will reverse as the common mode threshold is crossed.

    Quick past measurents show less than 100pA at room when exceeding common mode.

    So the quick answer is to plan for ±400nA, though the "+" side may be lower.

    I will close this thread as there is now a seporate internal email thread started.