Hi,
to be true... I don´t know what exactly you are looking for.
Is it hardware? schematic?
Is it software?
***
A design usually starts with the reqirements.
Now we just know
* RTD
* ADC 5V
* Temperature transmitter (Without details..)
But first you should decide:
* temperature range
* temperature accuracy
* conversion/ouptput update rate
Then look for a suitable RTD.... and read it´s datasheet and the application notes from the manufacturere with example circuits and their specification.
I recommendn to draw a really simple draft (hand drawn is OK) that shows shows your signal flow.
*****
Input side Errors:
An RTD supplied with a current source:
* accuracy, drift and noise of current source (
* accuracy, drift and noise of ADC_VRef
* accuracy, drift, noise, DNL, INL of ADC
* and wiring errors
Ratiometric measurement circuit: (RTD connected via R to ADC_VRef.
* accuracy, drift and noise of R
* accuracy, drift, noise, DNL, INL of ADC
* and wiring errors
I prefer this, because current source and VREF errors are cancelled out. A precise R is easy to find and cheap.)
Klaus