From reading previous posts, I noticed that AD9914 doesn't have a reconstruction filter on the die. Will the DDS work with F_OUT=SYS_CLK/2? Since I need this for a single tone application I don't care about spurs.
I'm pretty sure this will not affect the output DAC.
Will it the phase shifter maintain its accuracy of 16bit? If not, can someone say what will be the performance hit?