There are description about power-up sequence of AD5683R in the datasheet, P.26.
What happen If I couldn't keep the power-up sequence?
(The device will be broke or just the specification will change?)
Is there another rule about power supply , like ramp time or rule for power-down?
Sorry for many questions.
There is not restrictions in terms of ramp rate, as far is something "normal", we didnt test the part with a 10s ramp rate or non-montonic supply rate.
As far as I remember, the only restriction is to connect GND before apply power to any pin.
Obviously, we should recommend a supply to guarantee that under any condition the part will be stressed... If the delay between supplies is within ms, not major issue.
Thank you for your reply.
Its useful information for me.