Someone was discussing ADC resolution some time ago...didnt pay much attention to it at the time of course but.....if I recall, the PIC internal 10 bit ADC really is good for only 8 bits, and other 12 bit ADC are really only good for 10 bits...to get a true 10 or 12 bit ADC its going to have to be an external device? --------------------------------- Give spam the boot. Take control with tough spam protection in the all-new Yahoo! Mail Beta. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist