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ADAS3022 power supply acceptable peak-to-peak noise and ripple level

Question asked by skibool on Oct 17, 2016
Latest reply on Oct 17, 2016 by Gnib

Hi all, 


I want to ask about powering ADAS3022, I've desingned power supply for different IC which for loads required by ADA3022 have ripple and noise (measured on the output capacitor of power supply circuit): 

+/-7mV pp on +15V rail (VDDH)

+/-5mV pp on -15V rail (VSSH )

<1mVpp for 5V rail for powering analog part of ADAS3022. (AVDD)


For +/-15V I use CUK-SEPIC DC/DC converter suggested in ADAS3022 datasheet and SEPIC + LDO for AVDD. 


I was wandering if this power supply may work for 16bit ADC like ADAS3022 ? 


Regards Grzegorz