The fastest I am reading is maybe once a minute.  The client wants...desires...24 bit accuracy so have to stick with an external ADC.
   
  Thanks for the feedback.

Xiaofan Chen <xiaofanc@gmail.com> 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).

Xiaofan
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