Do AD7631/34 have any power supply sequencing between VCC and DVDD/AVDD?
Are there any rating of VCC to DVDD/AVDD or not?
Although I investigated the absolute maximum ratings of the datasheet, I could not find these relations.
There is no relationship of the VCC and DVDD/AVDD on the abs max rating. I would recommendend to follow the maximum ratings on the datasheet to make sure that the part will not be damage. The power up sequence that the AVDD should come up prior or simulataneously with DVDD and other supplies can be sequence as desired as long as they are within the absolute maximum rating.
I think the AD7631 does not require power sequencing. You are right as base from the Absolute maximum rating, there is no relation on VCC and DVDD/AVDD.
Thank you for your answer.
I just found on the p.23 on the AD7631 datsheet, a correction on the previous post. There is a need a sequencing for the AVDD and DVDD power supply, AVDD should come up prior to or simultaneously with DVDD, and this can be achieved using the configuration on the figure 27(p.19) of the datasheet. Apologies for some confusion.
I understand VCC and DVDD/AVDD do not require any power sequence.
Althouth the description of P23, "AVDD should come up prior to or simultaneously with DVDD." seems to differ from the Absolute Maximum Ratings.
For example, isn't AVDD to DVDD -0.3V to +7V?
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