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INA232: Looking for a Similar Part Capable of Storing Imax, Imin, and Iavg

Jorge De La Rocha
Prodigy 150 points
Part Number: INA232
Other Parts Discussed in Thread: INA181

This IC doesn't seem able to store Imax, Imin, and Iavg. Only the last value is stored in the register, if I'm understanding correctly.

Are there other similar ICs which have this capability?

Thank you

Jorge

  • 0
    TI__Mastermind 29650 points

    Hi Jorge,

    INA232 can report either the last instantaneous value, or the last Iavg. The time interval over which Iavg is calculated can be programmed by setting the number of average and conversion time. However neither Imin nor Imax over such time period is stored.

    Somewhat related though, is the Alert function where a low/high threshold can be set by user. Anytime the threshold is exceeded, some flags will be set. In addition, an ALERT pin will be set if configured to do so. The Alert function is available on INA232 as well as a number of other digital power monitors.

    Regards, Guang

  • 0 in reply to Guang Zhou
    Prodigy 150 points

    Hi Guang,

    Thank you for your reply. So, I suppose TI does not offer other ICs which would have the options I'm looking for?

    Thank you,

    Jorge

  • 0 in reply to Jorge De La Rocha
    TI__Mastermind 29650 points

    Hi Jorge,

    You’re correct. I’m afraid we don’t have such devices that fit your description, sorry.

    Regards, Guang

  • 0 in reply to Guang Zhou
    Prodigy 150 points

    Hi Guang,

    OK. On the INA181, the DS mentions on page 8, the IQ is 195uA typ., but on page 13, Fig. 27 IQ vs. VCM, between 2-4V, IQ is ~600uA and it is even higher at lower VCM voltages. Why isn't this clearly marked on the electrical characteristics page?

    That's a big difference in IQ!

    Thank you,

    Jorge

  • 0 in reply to Jorge De La Rocha
    TI__Mastermind 29650 points

    Hi Jorge,

    The electrical characteristics table normally specifies typical working conditions that are most common. It will soon become impractical if we were to include more. That’s why the typical curves are provided to cover other working conditions.

    In this case what you did is exactly correct – check the typical curves to prevent future surprises.

    Regards, Guang

  • 0 in reply to Guang Zhou
    Prodigy 150 points

    Hi Guang,

    I agree but an asterisk or something with a note below alerting the reader that there is more to this number. Otherwise, someone quickly looking for specs. comparison between parts can miss this and think that the performance is much better where in reality it is not.

    Thank you,

    Jorge

  • 0 in reply to Jorge De La Rocha
    TI__Mastermind 29650 points

    Hi Jorge,

    Thank you for your suggestion, I’ll note it and pass on to the team maintaining datasheets.

    Regards, Guang