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BQ76930: Do i need to do calibration for current?

Frank Hsu94
Prodigy 130 points
Part Number: BQ76930
Other Parts Discussed in Thread: BQ78350-R1

Dear 

According to the be76930 data sheet (section 7.3.1.1.3 16-Bit CC), it write the following statements

The following equation shows how to convert the 16-bit CC reading into an analog voltage if no board-
level calibration is performed:
CC Reading (in µV) = [16-bit 2’s Complement Value] × (8.44 µV/LSB)

What does  "no boarding level calibration is performed" mean?

Do i need to do calibration for current? i don't find any cue about doing current adc calibration in data sheet

Thanks 

  • 0
    TI__Guru* 81034 points
    Hi Frank,

    The bq76930 is calibrated at the factory so all devices will have consistent measurements within the datasheet specification. However, measurements can also be affected by board parasitics. The bq78350-R1 companion gauge or a microcontroller can do calibration to correct for any error due to the board. This is described in detail in Section 12.2 of the BQ78350-R1 TRM (Technical Reference Manual): www.ti.com/.../sluubd3d.pdf

    Best regards,
    Matt