Which N-well or P-well is the substrate of AD7328 ?
I can read that there is not the power sequence in AD7328 from aboslute maximum rateing.
But, I think if the substrate is a n-well, the first supply must be the most negative ,
and If the substrate is p-well, the substrate is connected to positive.
Our customer uses AD7328 at +-15 supply voltage but VSS (-15V) is powered after 30ms of VDD (15V).
Could you give me your advice about above to confirm if there is a problem about my customer sequence ?