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ADS8681: What is the group delay for inside 2nd order LPF?

BYUNG CHANG HWANG
Prodigy 41 points
Part Number: ADS8681

What is the group delay for the ADC inside 2nd order LPF?

  • 0
    TI__Mastermind 45135 points

    Hi BYUNG,

    We have no direct spec for the group delay of LPF on this ADC. However, the settling time can be considered. You will be able to get accurate data once the LPF is fully settled. The group delay is usually measured as time delay to 50% amplitude of a step pulse input and it's about half of setting time. 

    The setting time of LPF on this ADC is 125us at 16-bit level (0.5lsb).

    Regards,

    Dale