Description

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. In addition, the DS18B20 can derive power directly from the data line (?parasite power?), eliminating the need for an external power supply.

Note : You’ll need a pull-up resistor of 4.7K or 10K between the OUT and VCC pins in order for this sensor unit to function properly.

Features

• 1-wire communication
• Operating voltage : 3 – 5V
• Operating current : 1.5mA (active)
• Measuring temperature : -55 to +125?C
• ?0.5?C Accuracy from -10?C to +85?C
• Programmable Resolution from 9 Bits to 12 Bits
• Parasitic Power Mode Requires Only 2 Pins for Operation (DQ and GND)

Wiring

Files & Documentation

• Datasheet – DS18B20
• Details of DS18B20 chip – Component101
• Tutorial : How To Use DS18B20 Water Proof Temperature Sensor – Create Arduino