resolution is not accuracy. I don't think +-0.05C accuracy is practical. I never dream that high. ----- Original Message ----- From: "John Coppens" To: "Microcontroller discussion list - Public." Sent: Tuesday, December 23, 2008 8:47 PM Subject: Re: [EE] Inexpensive but accurate temperature reference > On Tue, 23 Dec 2008 20:30:56 -0500 > "microsoftwarecontrol" wrote: > > > 0.05C? 0.5 is hard already. 0.05/40, that means 0.1% accuracy in T! > > In fact, it's 0.05 / 273 C (or so). 0 C is a rather arbitrary reference. > 0.05/273 is 0.02% precision. > > tcn75a has a mode in which a 0.0625 C resolution is possible. That's near > the 0.05 you want. But Accuracy is only 1 to 2%. You will have to > calibrate sensor yourself. > > John > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist