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BQ79656-Q1: Main ADC sampling characteristics

Argyrios Theopoulos
Prodigy 10 points
Part Number: BQ79656-Q1

Hello,

we need the input capacitance (Cin) and the acquisition time (t acq) of the Main ADC of BQ79656.

This information is mandatory to select the bandwidth of the input filter of the analog-front end. We don't want to use the recommended BW from datasheet as it is too low for our application.

We need to monitor as much fluctuation of the voltage cells as we can (higher signal BW) so the recommended BW with the very low cut-off, does not fit for us.

We need Cin and t acq values in order to calculate the best trade-off  of the filter BW in combination with the given sampling rate. So it is all about settling time calculation of analog front-end, taking into account kick back effects.

Thanks in advance,

Argyris

  • 0
    TI__Genius 17370 points

    Argyris,

    We do not provide this internal information publically and it is important to recognize that not following the datasheet values affects other features beyond accounting for this filtering (hotplug detection, open wire detection/safety, accuracy etc.). 

    Regards,

    Taylor