On Wed, Apr 16, 2008 at 5:09 AM, Spehro Pefhany wrote: > For audio, since it is bipolar wrt ground, you probably want to > make Vdd the same as your uC Vdd, Vss = 0V, and Vee something like -Vdd. > You have to make sure your signal range does not go much outside the range > of Vee <= Vin <= Vdd, or if it does, that not much current flows, the usual. > If you're pushing the limits of Vdd - Vee, note that not all manufacturers > have as much as 20V abs max, and 15 or 16 is a lot better choice in most > cases, or go to a "real" analog mux, which will have better Ron, more > constant Ron with Vin(eg. lower audio distortion). Thanks everyone for the replies. That's sort of what I expected...I guess my confusion came in that I saw a schematic supposedly for audio that had Vee tied to ground. So...if I want to keep things simple, does anyone know of a single ended supply audio mux that's parallel controllable? Something that's 2x3:1 would be idea (three inputs, one output, in stereo). Some of the Maxim ones I've seen all require some sort of serial control and to be honest, parallel would be easier for the moment. I'm only going to be building a couple of these. Thanks! Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist