help with DAC output is it I, V or both?
 

the dac in question is the cxd2529q seen here http://www.datasheetcatalog.org/data...y/a6800636.pdf

if you look at the block diagram it shows there are 2 outputs per channel, an analogue out and a line out.

It looks to me as if the analouge out uses the internal IV converter and the lineout bypass's it.

Is this correct or have i missed something.

It's purely voltage out. Just gives you the option of using the second built-in opamp stage for lowpass or not using it.