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'[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.
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