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BQ76920: Temperature Accuracy Report

Che yi Su
Expert 1695 points
Part Number: BQ76920

Hi TI experts,
 I want to check TS1(use 103AT, 0% error) and DIE temperature report accuracy(℃) from -40 up to 85C. I like page.16 ADC accuracy table and its very useful.

My spec is 3 cells battery status check machine and temperature from -40 up to 99℃ and requirement of error max is +/-2 ℃. Would you help me to check it?
 

  • 0
    TI__Guru 54715 points

    Hi Che,

    The value from the ADC will depend on the thermistor resistance, the internal resistance, the 3.3V internal regulator which does not have a data sheet spec and the ADC which had a +/-35 mV max specification in an older data sheet.  The present data sheet does not have a specification.  You would need to analyze and test to determine if it can meet the desired accuracy.