TMP36 is a low voltage, precision centigrade temperature sensor. It provides a voltage output that is linearly proportional to the Celsius (centigrade) temperature. TMP36 does not require any external calibration to provide typical accuracies of ±1°C at +25°C and ±2°C over the −40°C to +125°C temperature range.
TMP36 is intended for single-supply operation from 2.7 V to 5.5 V maximum. The supply current runs well below 50 μA, providing very low self-heating—less than 0.1°C in still air. In addition, a shutdown function is provided to cut the supply current to less than 0.5 μA.
Generally you will apply 3.3 V or 5 V to pin 1 and GND to pin 3. You read pin 2 which outputs an analog voltage that is proportional to the temperature in °C.
The TMP36 is specified from −40°C to +125°C, provides a 750 mV output at 25°C, and operates to 125°C from a single 2.7 V supply.
0°C = 0.500 V
25°C = 0.750 V
50°C = 1.000 V
You can get the temperature from the equation...
temperature_in_C = (pin2_voltage - 0.5) * 100