Our customer is still evaluating your AD9257.
So he met the trouble.
When he drive AD9257 with power-down-mode, then the converting order become out of order on every time.
I recommended his power quarity and also Vref value, Vdd power trace/GND traceof PWB.
He has still confirmed it.
So do you have the reason why the converting value become out of order when power down mode?