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About AD9914 phase noise

Question asked by kenton.chu@anstek.com.tw on Jan 12, 2016
Latest reply on Aug 12, 2016 by ryan-tsai

Dear Sir,

 

Just would like to clarify the phase noise is different around 20~30dB with datasheet Figure.19 compared what we measured on EVB below based on system clock=2.5GHz (PLL enable for reference clock =50MHz and multiplier 50). Is anything ignored for that ?

By the way, the phase noise be better once bypass PLL through system clock equal to 2.5GHz generated by signal generator directly.

Thanks.

 

1137_5M10KPN.png

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