DS18b20 Digital Sensor:
1.Multidrop capability simpifies distributed .
2.1-Wire interface.
3.Newly ISO system.

DS18B20 DIGITALSENSOR :

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

.  Multidrop capability  simplifies distributed  temperature sensing applications.

.  Require no external components.

. Can be powered from data line. 

  Power supply range is  3.0 V  to 5.5 V.

. 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 DS18B20.

. Alarm search command identifies and 8-Pin SOIC (150 mil)

addresses devices whose temperature is

outside of programmed limits (temperature PIN DESCRIPTION

alarm condition) .

. Applications include thermostatic controls, DQ - Data In/Out

industrial systems, consumer products, VDD - Power Supply Voltage

thermometers, or any thermally sensitive NC - No Connect

system

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   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. 

Because each DS18B20 contains a unique silicon serial number, multiple DS18B20s can exist on the same 1-Wire bus.  This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperature inside buildings, equipment or machinery  and process monitoring and control.