Steve - I was really hoping that the ADCON1 thing was it as I missed that one, but still no go. I did the 50 mS pause you recommended, too.

I can't help but think this is one of those "can't see the forest through the trees" thing. I'm sure it's staring me right in the face. I am using a 12 bit D/A (4-channel) chip (MAX525) on this board as well and it works perfectly. Can't imagine why the A/D chip is giving me such a hard time...

Let me know if you think of anything else! Thanks!