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TLV9022-Q1: Electrical Parameters across -40C to 125C Temperature

Wilson Pang
Intellectual 590 points
Part Number: TLV9022-Q1

hi Sir, may I know what is the absolute max guaranteed range for Input Offset Current, Input Bias Current, and Output Leakage Current (Open drain) across temperature -40C to 125C?

The numbers shown in the datasheet are meant for 25C only.

As this is an automotive part, please provide me the range across temperature -40C to 125C.

Is the range going to be derived from 6-sigma distribution?

Thanks

regards

Wilson.

  • 0
    TI__Mastermind 49946 points

    Hello Wilson,

    TI policy is to production test specs in the Min or Max column. It is not economically viable to test bias current at these levels in production for these devices, so we do not guarantee bias current. We cannot provide a guaranteed value for these specs.

    Typical input bias current behavior is shown in figure 6.6. Since bias current is an untrimmed/untested parameter, bias current can vary by lot and device. So we recommend planning for ±30% variance over devices and lots.

    So if you need a design number, I would use 4nA over temp for bias current and 70nA over temp for leakage current. Again, this is design guidance and not a warranty.


  • 0 in reply to Paul Grohe
    Intellectual 590 points

    Thanks for the quick reply.

    May I know how about Input Offset Current? 70nA is for Output Leakage Current?

    Traditionally, TI gives those parameters I mentioned a limit or range across full temperature range (-40C to 125C) for op-amps.

    I am surprise it is not the case for TLV9022-Q1 comparator.

    regards

    Wilson Pang.

  • 0 in reply to Wilson Pang
    TI__Genius 10525 points

    Hi Wilson,

    70nA is the rough output leakage current and 4nA is the rough estimate of input bias current. Both of these are not warrantied values and vary over temp.

    Usually, input bias current isn't an important spec with a comparator as the impedances of the two inputs are usually quite different. A lot of times, one input is driven by a source and the other is driven by a resistive divider.

    May I close this thread and friend request you on the forum so that I contact you directly? That way, I can understand if and why this spec is crucial in designs that use comparators.

    Regards,

    Joe

  • 0 in reply to Joe Vanacore
    Intellectual 590 points

    Hi Joe,

    Thanks for the comments. I truly understand that Input Bias Current may not be an important parameter in a comparator, however, my analysis needs to be completed based on a certain ball park figure.

    Having said that, I would not be able to let the Input Bias Current to be null or zero.

    It would not make sense at all.

    It is good that TI advised 4nA for me to complete my electrical analysis for Input Bias and Offset Current.

    Thanks,

    regards

    Wilson