AnsweredAssumed Answered

AD7606 VDRIVE Pin Ripple

Question asked by spflanze on Mar 12, 2012
Latest reply on Mar 13, 2012 by spflanze

How important is it that the VDRIVE pin of the AD7606 be low noise? I am designing it to interface to an ADSP-BF547. Its 3.3V supply will be identical to the Buck Switcher in the schematic for the ADSP-BF548 EZ-KIT Lite:

http://www.analog.com/static/imported-files/eval_kit_manuals/BF548_EZKIT_Ref.Man_REV1.3.pdf

on the lower right portion of page 126.

 

My concern is the switch mode power supply ripple coupling noise into the A to D conversions, and whether I should source the 3.3V from a linear regulator for VDRIVE.

Outcomes