DS18B20 Datasheet PDF - Dallas Semiconductor

●DESCRIPTION

●The DS18B20 Digital Thermometer provides 9 to 12-bit (configurable) temperature readings which

●indicate the temperature of the device.

●Information is sent to/from the DS18B20 over a 1-Wire interface, so that only one wire (and ground) needs to be connected from a central microprocessor to a DS18B20. Power for reading, writing, and performing temperature conversions can be derived from the data line itself with no need for an external power source.

●FEATURES

●Unique 1-Wire interface requires only one port pin for communication

●Multidrop capability simplifies distributed temperature sensing applications

●Requires no external components

●Can be powered from data line. Power supply range is 3.0V to 5.5V

●Zero standby power required

●Measures temperatures from -55°C to +125°C. Fahrenheit equivalent is -67°F to +257°F

●±0.5°C accuracy from -10°C to +85°C

●Thermometer resolution is programmable from 9 to 12 bits

●Converts 12-bit temperature to digital word in 750 ms (max.)

●User-definable, nonvolatile temperature alarm settings

●Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition)

●Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system