Other Parts Discussed in Thread: ADS131E04
Hello,
I am designing with ADS131E04 and I found a possible issue with its power sequencing. I have to use a 5 V AVDD input and a 3.3 V DVDD input.
As the data sheet states that AVDD - DVDD should be in the -2.1 / 3.6 V range, I will violate this limit for a while whichever power line I turn on first: if I first turn on AVDD, then AVDD is 5 V and DVDD is 0 V, so their difference is 5 V; if I first turn on DVDD, then DVDD is 3.3 V and AVDD is 0 V, so AVDD - DVDD = -3.3 V.
It is also obviously not easy to turn them on together, as I have no assurance that they don't violate that range.
Is there something I missed about this issue? Which would be the best approach?
Thanks in advance,
Stefano Infante
