The recommended power supply sequencing stated in the hardware manual for the ADV7441a was not followed in our prototype boards yet the part appears to work fine in all four of our units. Also, there is no exact spec on time a supply should be up before another one. Our existing PCB has all the supplies power up at about the same time.
Is the hardware manual correct in stating it wants the 1.8V supplies up before the 3.3V and vice versa on power down? I noticed the power sequencing is opposite for other similar Analog Device chips such as the ADV7842. How critical is the power sequencing for the ADV7441A?
Thanks in Advance,