This is the same temperature sensor that is included in SparkFun 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 Datasheet