I'm planing to use an AC signal (10Vp-p without DC bias) as Vref. But haven't seen any doc mentioned this. The most similar one is "Multiplying DACs—AC-Arbitrary Reference Applications", but the 'AC references' mentioned in it's examples are all positive ones. So I'm not sure if I can use a 'zero-centered' AC signal as Vref. And if I can, what should I take care comparing with the 'fixed reference' usage?