I thought I noticed a discussion about minimum +VREF values when USING the Mid-Range PIC A/D converter. I using 16F818, but I couldn't locate any documentation about such a limit anywhere. Does anybody know if there is a minimum +VREF voltage and if so, what is it? --Bob -- Bob Axtell PIC Hardware & Firmware Dev http://beam.to/baxtell 1-520-219-2363 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.