This is the same temperature sensor that is included in the SIK Inventor's Kit.
The TMP36 is a low voltage, precision centigrade temperature sensor.
It provides a voltage output that is linearly proportional to the Celsius temperature.
It also doesn't 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.
We like it because it's so easy to use: Just give the device a ground and 2.7 to 5.5 VDC and read the voltage on the Vout pin.
The output voltage can be converted to temperature easily using the scale factor of 10 mV/°C.

Features:

• Voltage Input: 2.7 V to 5.5 VDC
• 10 mV/°C scale factor
• ±2°C accuracy over temperature
• ±0.5°C linearity
• Operating Range: −40°C to +125°C

Documents:

• Datasheet