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AD9776A Output

Thread Summary

The user encountered no signal output from the AD9776A DAC despite a 120 MHz reference clock, 480 MHz ADC clock, 1920 MHz VCO clock, and PLL lock. The issue was assumed resolved outside the forum. The engineer suggested checking if the output is expected directly from the DAC or through intermediate components and recommended contacting a local Field Application Engineer for further assistance.
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hello

   I encountered a problem when I used the AD9776A. In my design, the reference clock was 120Mhz, the ADC clock was 480Mhz, the VCO clock was 1920M and the PLL display was locked. I use 15Mhz sine wave and cosine wave as input signal, my input data rate is 120Mhz, the TXENABLE signal keeps high level and the SYNC signal keeps low level, but there is no signal in the output part. Which part should I check? Here is the value of my register.

   0000,0188,0208,0340,0400,0500,0600,0700,08EB,09CB,0A1F,0B00,0C02,0D00
   0E00,0F00,1002,1100,1200,1900.

   Regards.

   K.D 

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