>> I am going to do A/D conversion with PIC12C672 @ IntRC (4MHz). Which one of the following cases will give me better accuracy: 1. Device in SLEEP (Int. ADC RC osc.) 2. Not in SLEEP, Int. ADC RC osc. 3. Not in SLEEP, 8Tosc << Accuracy should't be an issue as long as the acquisition and bit conversion minimum times are observed, regarless of how they are timed. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.