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AD9910 -PLL Loop Filter Adjustment

Question asked by meir.alon@weizmann.ac.il on Nov 7, 2014
Latest reply on Nov 13, 2014 by meir.alon@weizmann.ac.il

Hello

 

I am using AD9910 and i have configured the open loop freqeuncy to 50khz, i see very high phase noise

in the output signal as the output freqeuncy increase ( about -30dbc).

my question is what is the suitable open loop frequency for working with this DDS, when working with VCO-5 ?

my components values are R37=62 Ohms C13=125nf , C15= 25nf

 

Thanks

Meir

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