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BQ25887: BQ25887 Voltage detection error

Part Number: BQ25887

BQ25887 has a 16-bit ADC.However, when I tested the BQ25887EVM board, the voltage error was 18mV.

As shown below.

BQ25887 detection

Is there any way to calibrate this voltage?

Thank you very much!

  • Skate,

    The integrated ADC measures this voltage directly at the pin. I see from your photo your are measuring at the screw terminals of the EVM. This is not a good practice as there is a small voltage drop from the trace resistance between the IC and the terminal.

    Please retake the voltage measurement as close the the IC as possible, and let me know if you are still seeing the inaccuracy.

    Thanks,

    Ricardo