Taking an FFT of the I & Q channels of the AD9717 shows a spectrum of noise that shows up at different frequencies over different printed circuit boards. Noise components have been seen almost 125kHz away from each other, usually there are only a couple of kHz of noise that can be seen.
Please send me the FFT plots.
This is a picture of the Ineg channel. The Ineg and Rlin pins are tied together in this design. We did not see this noise in a previous iteration of printed circuit boards with the exact same schematic design.
A choke (BLM15HG102SN1D) was used between pins 5 & 17 (3.3V) and pin 26 (A3.3V) causing noise in the DAC. When the choke was removed and the pads shorted, the noise went away.