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ad9914:about the problem of spurrious

Question asked by qsjlding on Jul 29, 2015
Latest reply on Nov 25, 2015 by serdar

Hey,all

I got a problem when I use ADF4351 as the refclk@3G, Let the output at 1.12G, wen power on, always have unexpected spurious, and the noise floor got up, I try to change the dvdd(1.8v) to 1.72v or 1.68v, yes, this can work, but I don't know why, and for two or three ad9914, the Dvdd has to change different value.  so , I want to get help from you, how can I do?

 

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