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AFE4400: NUMAVG Register Settings?

Gregory Duperon
Expert 6650 points
Part Number: AFE4400

The datasheet suggest that the number of samples used per conversion phase is preset to 2.

Is there a way to change this?  If so, what register settings would I need to change?

I have a customer sampling at 125Hz with a 25% duty cycle.

  • 0
    TI__Genius 12575 points
    Hi Gregory,

    The ADC digital samples are accumulated and averaged after every 50 µs of convert signal. Also one convert signal is ~1/4th of a PRF (sampling frequency).
    So if you want to increase the averaging, you have to increase the PRF so that convert signal's width increases which automatically increases the ADC averaging.
    There is no register to control the ADC averaging as it is controlled by the AFE with respect to convert signal.
    For further details, please refer to section 8.4.1.1 of the datasheet.

    Regards,
    Prabin