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PICList Thread
'[EE] DAC grounds, interfaced to a PIC'
2012\05\14@143319 by alan smith

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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?

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