Hi Alan: I remember seeing somewhere that to get the full resolution you need to have the PIC sleeping during the conversion. That way digital noise will not be a problem. Are you doing that? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist