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A Strange phenomenon of AD9832

Question asked by xcx on Apr 13, 2018
Latest reply on Apr 15, 2018 by xcx

Hi, I want to use AD9832 to generate a sine wave of 30kHz, and I use the following command series:

0xF800

0x3300;
0x2251 ;

0x31EB;
0x2085;
0xC000;

and this process is similar to that of AN-621. Ideally, the output frequency is 30kHz(MCLK=24MHz), but I find the signal is not stable, see the figure. For sometime, the waveform disappears, and soon recovers. What happened? Why? What's the possible causes?

the 

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