I'm using the DDS function of the DAC. I've tested the DAC in normal mode, where I set values using DACDAT and get the same output range is mentioned in another post on here, however when I switch to DDS mode, I get a clean, stable sine wave, but it only uses approx. 3/4 of the full DAC output range. I can't find a specification for the DDS output range in the datasheet, just that it's not adjustable. Has anyone found the spec anywhere?