Conditionning a temperature sensor type PT1000 with an FPAA

[Guillaume]

pt1000 temperature sensor

I am a french student in trainning course in M.E.V company (Toulouse in France).
And I would like to condition a temperature sensor type PT1000.
I think about an FPAA solution.
I have 4 sensors.
A discret circuit already exist but it is very noise sensitive.
So it's the reason why i would like to integer this circuit in a chip.
If somebody has an idea he can answer me.
Thank you for your help.

 

[7rots51]

pt1000 temperature sensing circuit

hi
I do not have any idea about FPAA,But I worked with REF200 from TI and 16/24 bit sigmadelta converters from TI or ADI ,you can directly convert RTD signals to digital.

see data sheet of AD7719 ,AD7715,AD77xx,LTC2418 (www.linear.com)

TI and ADI have app notes on rtd also,microchip also had an application note on rtd ,you can search and find them.

Bye

 

[ynhe]

pt1000 temperature circuit

I think FPAA have a advantage of the nonlinear compensation for pt1000.
and it can also be connected with 4 sensors once a time and can be selected by mux in the chip,such as Anadiam's AN120E04 and AN220E04.

See www.anadigm.com

ynhe