The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements.
It has an operating temperature range of -55°C to +125°C and is accurate to ±0.5°C over the range of -10°C to +85°C.
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.
Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus.
Power Supply Range is 3.0V to 5.5V. The sensor can be Powered from Data Line
The typical application circuit includes a pull-up resistor 4k7 on the data wire.
Circuit with external power supply. Refer to Data Sheet for circuit with data pin power.