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Weak signal at the DAC input

Question asked by HIDIR on Jul 27, 2012
Latest reply on Aug 2, 2012 by HIDIR

Hi everybody ,


I have created my own DAQ board using AD6644 and AD9764 as indicated in their evaluation boards' document.

I want to ask some questions :


1) The Vref supply does not source current after the AVCC is connected is it OK ?


2) Is there a problem in the conversion if i directly apply the analog ground to SLEEP pin different than as indicated in the datasheet page 18 ? The digital VDD is 3.3 V.


3) As in my thred in xilinx forum

     do you have any suggestion about the FPGA output configuration ?


Thank you very much