Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
first you need to convert the resistance change of PT100 in mV.
for this you need to make constant current circuit for PT100 using OPAMP so that it give some voltage proportional to the resistance linearly.
after u got mV u can easily interface to any ADC u want
Normally you should provide more details, but I think that the following will help you:
[PDF] APPLICATION BULLETIN
File Format: PDF/Adobe Acrobat - View
the circuits for making precision current sources and sinks.
The precision current source and sink are based on the new. REF102 10.0V voltage reference. ...
MAKE A PRECISION CURRENT SOURCE OR CURRENT SINK
By R. Mark Stitt (602) 746-7445
**broken link removed**
when the signal is scaled 0 to 5 then you can use a MCU with analog signal or use an adc. Let me know how you want to use it to tell you the changes you should make to the one on the datasheet
thank only using the helped me button