At 12:31 AM 1/23/2008, you wrote: >On 1/23/08, alan smith wrote: > > So in searching around....LTC, TI, ADI and a various set of > > obsure vendors... > > > > Seems that the AS7793 is the chip of choice...built in current > > source, seems to be the perfect interface to a 3 wire RTD. > > Anyone used these before? Seems pretty straight forward to use. > >I think you mean AD7793. It seems to be a good part even >though the speed is a bit slow (but should be fine with RTD >application). > >If you are looking at the performace of AD7793, the other >possibility is to look at Silabs C8051F060 which has >integrated best-in-class ADC for Microcontrollers >(2ch 16bit ADC up to 1Msps). If we get signal the temperature is changing fast enough to need a 1Msps ADC I think somebody set up us the (nuclear) bomb. >Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist