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AD5422 Power Sequencing?

Question asked by JDoctor on May 7, 2012
Latest reply on May 8, 2012 by MCollins

i currently have an evaluation board of the AD5422, and noticed that when i supply the AVdd first before the DVcc it only gives me an error of +/- 2mV(voltage output: 0-5V range) and when i supply DVcc first before AVdd it gives me an error of about 2V.

Based from my data that I got from the evaluation, it seems that need to power up the Analog first then the DVcc which was not mentioned on the ad5422 datasheet. I already checked whether there is something wrong with the data that the DAC is receiving and also the read back that the ADC is providing.

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