Post by thread:[EE] DAC grounds, interfaced to a PIC

I'm looking at a design that uses a serial input DAC with the data from a PIC micro. The reference design shows the micro ground tied to the DAC digital ground (makes sense of course), and what appears to be a single ground point from the remainder of the analog grounds back to the micro ground (single point). So I am assuming that 1. power source is common on the board, so it should go thru a ferrite bead/cap to prevent noise in/out between the two circuits. 2. The DAC analog grounds should be an island with a single connection back to the digital ground, preferably tied on the bottom of the board underneath the digital control signals. Anything else?