View Full Version : Problems using Analog Devices TMP36F sensor

09-15-2006, 12:39 AM
Good day.

Im using TMP36 together with Nordic 24e1 chip (ADC). Internal banggap
1.2V. Normally now it showing 740-760mV.

How i can calibrate device ?

09-15-2006, 03:41 PM
The ADCRES is left aligned. I "guess" you are reading the Low register, whereas the useful data is in H register.

Anyway your question is not properly framed.
Are you talking about the sensor showing 740mV
or the ADCREF showing 1.22V ?

How are you getting/reading the 1.22V reference ?
hope you have not set the input to differential mode.

Please post in detail next time, preferably with circuit.

09-15-2006, 10:11 PM
i hope that the banggap voltage is 1.2V...

the main hypotise is that the 750mV out of the sensor when
25 C. it colibrated is C.

so the question is: how i software correct values of ADC conversion.

the main trouble - i have not any electronical or some test termometer to test the hypetise of the right values of the sensor.

ADC now in single ended mode.