In theory, option 1. The idea is that the main osc is turned off and thus the only digital switching noise is the internal RC clock. However, this really may be masked by noisey external circuitry. Peter H Anderson, http://www.phanderson.com --- Arkady Skorokhod wrote: > Hi, > 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.) __________________________________________________ Do You Yahoo!? Yahoo! Sports - Coverage of the 2002 Olympic Games http://sports.yahoo.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.