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BQ76PL455A-Q1: ADC resolution

Jeffrey Wright
Expert 2875 points
Part Number: BQ76PL455A-Q1

Can you clarify:

1. The datasheet (SLUSC51C –APRIL 2015–REVISED NOVEMBER 2016).. lists the equation below for vsense calculation, using what appears to be a value for a 16-bit ADC... I thought it's a 14-bit converter, or should be 16384. Is this correct?



VCELL = [(2 × VREF) / 65535] × READ_ADC_VALUE

  • 0
    TI__Genius 17370 points
    Hi Jeffrey,

    Thanks for the question! The datasheet formula is correct and the 16 bits can be explained in section 7.3.3.2 : "Individual
    samples are arithmetically averaged by the bq76PL455A-Q1, which then outputs a single 16-bit (14 bits + 2
    additional bits created by the averaging process) average measurement."

    Best Regards,

    Taylor