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AD7982 VREF power sequence?

Question asked by xiaoyiff on Sep 12, 2016
Latest reply on Sep 13, 2016 by Gnib

Hi 

We are using AD7982 in ultrasound device for CW signal sample. VREF=5V, VDD=2.5V, VIO=2.5V. three independent power source.

Is there any power sequence requirement for VREF and VIO/VDD?  In our design, our VREF is powered up before VDD and VIO, not sure whether this will damage IC. The datasheet only indicate that VIO and VDD have no power sequence requirement.

 

Could you please help confirm this issue? Thanks!

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