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ATL431: Vref Accuracy

Kuramochi Tadahiko
Guru 28715 points
Part Number: ATL431

Hi,

I'm considering Vref accuracy as below on typical condition and -40℃~85℃.

Is my understanding correct?

I would like to know if VI(dev) is absolute value or positive value.

Best Regards,

Kuramochi

  • 0
    TI__Genius 9375 points

    Kuramochi-san,

    Please observe this paragraph below, this better highlights the variation across temperature and what goes into this.

    In addition, I want to highlight our ATL431LI here, this device allows for even better accuracy of Vref and should offer improvements everywhere else. if you are still in the design phase, this is an improvement worth looking at.

    Thanks,

    Abhinav.

  • 0 in reply to Abhinav.Sharma
    Guru 28715 points

    Abhinav-san,

    Thank your for your support.

    Sorry, I can't understand how to read above graph...

    Though I would like to know guaranteed accuracy on worst case(dispersion and temperature), how can I calculate?

    In the case of ATL431LIA,are following equation correct?

    ・Top side: 2525mV+17mV=2542mV

    ・Down side: 2475mV-17mV=2458mV

    Best Regards,

    Kuramochi

  • 0 in reply to Kuramochi Tadahiko
    TI__Genius 9375 points

    Kuramochi-san,

    The specs listed for Vref are at recommended operating conditions of 25 C. For the whole deviation over range the max of 17 mV includes the whole deviation from Vref(min) to Vref(max). This means that the worst case theoretically over temp would be 2475 mV - 17 mV and 2525 mV + 17 mV.

    Thanks,
    Abhinav.