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DDS selection

Question asked by Kiran on Jan 25, 2012
Latest reply on Feb 21, 2012 by JLKeip

Hi,

At the moment I m in the confusion of selecting a DDS in the pool. As there are lot of devices one seem to be better than other.

My requirements are:

 

Low Jitter clock output: 70M Hz to 80 MHz

Clock resolution:           1kHz

 

Reconstruction Filter: Band Pass, Elliptic, f1 = 60 MHz, f2 = 90 MHz

 

Low Jitter clock will be further used as a clock to AD9265 (80MSPS) to digitalize the received data (~6MHZ).

Clock to the FPGA (where the demodulation done) will be generated from the same clock but at different frequeny using clock divider AD9513.

 

As of now i came to conclusion that one DDS is enough where REFCLK is 25MHz and in further i can use PLL multiplier for a higher SYSCLK.

Does the PLL include any phase noise? When is it to be considered?

 

I found AD9958 or AD9913 as a better choice. Is there any other ones to recommend?

 

Can you please tell me what does it mean Compliance Range(V) in DDS?

 

Thanks a lot in advance.

 

Regards,

Kiran

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