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AD9371 power supply sequencing

Question asked by stevereine Employee on May 22, 2017
Latest reply on Sep 8, 2017 by Vinod

Question from Vanteon;


We've read the power supply sequencing recommendations on page 57 of the datasheet. However, when we put a scope probe on the power supply pins on the evaluation board, 3.3V comes up at the same time as the 1.3VD, and the 1.3VA and the 1.8V come up after. This is in conflict with what the datasheet recommends. Attached find a scope plot showing these signals.


Are these power sequencing recommendations hard and fast or is there some margin in there,