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AMC7834: Ripple Rejection for AMC DAC Outputs

Paul Mourges
Prodigy 10 points
Part Number: AMC7834

AMC7834

Is there any ripple rejection between the AVss pin and the output of the DAC on this IC, the datasheet shows output noise from the DAC's but I am not seeing any information on ripple rejection. 

I am considering a LDO external to the chip if there is nothing to reduce any noise on the input bus passing through the AMC. 

  • 0
    TI__Expert 5440 points

    Hi Paul,

    The AMC7834 has limited PSRR at higher frequencies.  While we do not have full characterization data for this time, our bench testing has shown <10dB PSSR at frequences >500kHz.  Is there a specific frequency of your SMPS that you are concerned about?

    Thanks,
    Erin