> > What was the behaviour you observed? Missing values? > > Right. So I'm not wrong. There are more than 6-7 bits ? At least 9. but there is so noise anyway (there was some when I used 0V/5V as references). But again, you sound as if you tried (with <2V reference) and observed the behaviour. In what way did it deviate from the specs? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist