AnsweredAssumed Answered

AD5932 DAC image filter necessary for driving PLL

Question asked by Wolfgang on Mar 31, 2011
Latest reply on Apr 1, 2011 by Wolfgang

Hi,

I want to drive a PLL's REF input with an AD5932 to generate sweeps. In a previous design, an AD9834 was used for this. With this device, an LP filter from DAC out to Vin was necessary for image suppression, and we used the Sign_out PIN for driving the PLL.

 

If I use now the AD5932 to drive the PLL via the MSBOUT pin, will I need a similar filter ? If yes, how would I apply this, as the AD5932 has no VIN to an internal comparator.

 

Cheers,

Wolfgang

Outcomes