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This is a DS18B20 1-Wire digital temperature sensor from Maxim IC (Dallas). It reports degrees C with 9 to 12-bit precision, at temperature range of -55°C to 125°C (±0.5ºC). The sensor uses Dallas 1-Wire protocol and it requires a 4.7Kohm resistor as a pullup from the data to the Vcc line. This protocol allows multiple sensors to be connected on the same bus. Each Dallas 1-Wire sensor has a unique 64-Bit serial number etched into it, so the master can easily recognize each sensor on the bus This sensor is usable with 3.0~5.0V systems.
Technical Details:
Usable temperature range: -55ºC to 125ºC (-67ºF to +257ºF)
9 to 12 bit selectable resolution
Uses 1-Wire interface - requires only one digital pin for communication
Unique 64 bit ID burned into chip
Multiple sensors can share one pin
±0.5ºC Accuracy from -10ºC to +85ºC
Query time is less than 750ms
Usable with 3.0V to 5.0V power/data
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