Where should I connect DACGND of AD5060?

AD5060 has two grounding pins: AGND and DACGND.

DACGND is described as "DAC core ground input".

I'm pretty accustomed to A/D circuits having different ground terminals for digital and analog parts, and if DACGND was labeled as "Digital ground input" I wouldn't be as confused as I am now.

So the question is - which ground plane should I connect DACGND to? Should it be digital plane with MCU and other fast switching ICs or should it be analog plane?