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AD7763-DRDY&FSO are always 0

Question asked by Graypill on Apr 22, 2017
Latest reply on Apr 24, 2017 by Graypill

Hi !

 

I'm testing a AD7763 now. I powered AD7763 , provided MCLK=20MHz and set RESET=1 SYNC = 1. I think that , without any other configerations, the AD7763 should works and have pulse on DRDY and other control pins. However, I find out that DRDY and FSO are both 0, SCO = 20MHz(which is correct)  and SDL is 1 (which is also correct).

 

I don't know why DRDY and FSO are both 0. At least  they should be 1. Do they need pullup res? Or should I do any other configerations? Thank you for you time.

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