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TPS386040: How to read the Worst case device accuracy for voltage monitoring from datasheet

Ajit Nandakumar Mannargudi
Prodigy 70 points
Part Number: TPS386040

Hi,

I would like to understand how to read the worst case Voltage Monitoring accuracy from the datasheet. The datasheet says 0.25% typical, but I am not sure how to deduce the worst case accuracy  (over temperature of 0-70 deg /part to part variation) that can be guaranteed.

Thanks

Ajit

  • 0
    TI__Genius 12630 points

    Ajit,

    Worst case accuracy can be found in the Electrical Characteristics table for any device. This is Table 6.5 in the datasheet.

    Notice, there are MIN, TYP, and MAX values for V_ITN (negative-going input threshold voltage). The typical value represents the operation at room temp but the MIN and MAX value represents worst case value over temperature and all operating conditions.

    Worst case accuracy = 1 - (0.396 / 0.4) or 1 - (0.404 / 0.4) for MIN and MAX respectively so in this case +/- 1% accuracy worst case. Please let me know if you have any other questions. Thanks!

    -Michael