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AD9834 bad output waveform

Question asked by Jovan on Jan 18, 2017
Latest reply on Jan 20, 2017 by Jovan

   Something odd is happening to AD9834 DDS after few months (2-3) of contionuous working. It gives output like in attachment.

   It's strange that the same thing happens to every IC i have used, it happened 3 times already. Last thing I have tried is to lower MCLK from 75MHz to 48MHz. Now I should wait for months.

   My question is what part of IC gives this waveform? Is it output stage or internal ROM for example? If it's output stage, then I should modify circuit...