Dallas DS18B20 Digital Temperature Thermometer for Arduino

The DS18B20 is a very small thermometer which can be easily hooked into the Arduino MCU through any digital input! It requires very little in the way of additional support, a couple of resistors and some hookup cables and you're set to go.

The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with non-volatile user programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20 distributed over a large area.
Unique 1-wire interface requires only one port pin for communication
Each device has a unique 64-Bit serial code stored in an on-board ROM
Multidrop capability simplifies distributed temperature-sensing applications
Requires no external components
Can be powered from data Line
Thermometer resolution is user selectable from 9 to 12 Bits
Converts temperature to 12-bit digital world in 750ms (Max)
User-definable non-volatile (NV) alarm settings
Alarm search command identifies and addresses devices whose temperature is outside programmed limits
Sensing & Instrumentation
Consumer Electronics
Automation & Process Control
System Monitoring

IC Output Type: Digital
Sensing Accuracy Range: ± 0.5°C
Sensing Temperature Min: -55°C
Sensing Temperature Max: +125°C
Supply Voltage Min: 3V
Supply Voltage Max: 5.5V
Sensor Case Style: TO-92
No. of Pins: 3
Device Marking: 18B20
Operating Temperature Max: 125°C
Operating Temperature Range: -55°C to +125°C
Output Current: 4mA
Resolution (Bits): 12bit
Sensor / Transducer Type: Temperature
Supply Current: 1mA
Supply Voltage Range: 3V to 5.5V

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