The DAC seems to have sparkle codes so I'd avoid it - its also hard to use with its output
range restrictions (its designed for audio, not precision, as far as I can tell)
A separate DAC on a low-noise analog supply rail would be a wiser choice (the 3.3V rail
on the Due is very noisy).
[ see Horrific DAC noise on DUE board - Arduino Due - Arduino Forum ]