On Sat, Mar 1, 2008 at 1:22 PM, Bob Blick wrote: > Xiaofan Chen wrote: > > > Microchip is using the same CMOS process used in the MCU > > for most of their analog product. Basically this means many of > > their analog parts will be good enough for higher voltage (12V, > > or even +/-15V) operation. Therefore we basically do not use > > any Microchip analog parts. > > If the parts are good enough, that is why you don't use them. > > I don't understand what you mean, please explain. > We need +/-15V parts for the OPAMPs and +15V for the regulators. So Microchip is out. I was looking at some of the analog parts Microchip offered (ADC, DAC, Opamps, LDOs, Vref, PWM controller, etc) and none of them were good enough. I looked at them again last week when they visited us and still could not find anything interesting. Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist