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DAC AD9957

Question asked by BLue39 on Nov 14, 2013
Latest reply on Dec 12, 2013 by sitti

I am using AD9957 chip. I want to use it for the 200 MSPS data rate.

I have applied 25 MHz of differential clock to as the REFCLK to the chip.

In the SPI Register Map, I have enabled the PLL and I have chosen the VCO Band.

But I am unable to find, where I am supposed to input the PLL Multiplier and Divider Values.

 

I think I will be needed to generate a 200 MHz of System Clock for the data rate of 200 MSPS. Is my assumption correct?

How can I set the required SYSCLK frequency using the REFCLK of 25 MHz and the Internal PLL?

 

-- Manjeet

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