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AD7793 and use of Digital Isolator

Question asked by Aryan on Aug 8, 2014
Latest reply on Aug 13, 2014 by Aryan

 

When ADuM5401 ( used for isolation of SPI signals between microcontroller and AD7793) output VISO is used to power both AVDD and DVDD of AD7793, whether ripple/spike, noise on VISO will degrade adc measurements?

Is it advisable to use isolator and separate dc to dc convertor followed by low noise, high PSRR LDO to power up adc side of isolator and  AVDD and DVDD of AD7793.

Thanks.

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