resistance to voltage conversion

[swetha123]

i am having a temperature sensor range -40 deg C to 100 deg C.the problem is my data acquisition system can take only 0 to 5 V.


can u suggest me suitable conversion ckt for this......

 

[sudan]

Please select proper ADC . Refer the data sheets of different ADCs and fix it based on your value.

Bye

Swamy

 

[bobcat1]

Hi

Find what is the current needs of your sensor (how much current he need to work properly)
Design a temperature compensated current source(see TI& ANALOG site for application note and components)

Feed the sensor via the current source and sample the mid point voltage (the connection between the the sensor and the current source using your A/D converter

The mid point voltage should be proportional to the current temperature

All the best

Bobi

 

[kender]

can u suggest me suitable conversion ckt for this

Swetha, you didn't write what type of sensor you have.
If it's a thermistor, then resistance is converted to voltage with a voltage divider circuit.