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ADS1278 SNR vs clock speed

Dave Courtney
Prodigy 40 points

Is there any improvement in the SNR at lower clock speeds? We plan to use hi-res mode at 15kSPS

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    TI__Mastermind 23235 points

    Are you referring to input clock speeds or data rate?

    By changing the clock speed, you will change BOTH the modulator frequency

    Data rate = yes, see front page of datasheet

    For the input clock frequency, Figure 46 is the d/s shows the noise vs clock speed, which is pretty flat.  So it would make sense the SNR follows similarly.