DESCRIPTION
The DS1825 digital thermometer provides 9 to 12-bit centigrade temperature measurements and has an alarm function with NV user-programmable upper and lower trigger points. The DS1825 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. 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. In addition, the DS1825 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.

FEATURES
■ 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
■ 4 Pin-Programmable Bits to Uniquely Identify Up to 16 Sensor Locations on a Bus
■ Requires No External Components
■ Can be Powered from Data Line. Power Supply Range: 3.0V to 3.7V
■ Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
■ ±0.5°C Accuracy from -10°C to +85°C
■ Thermometer Resolution is User-Selectable from 9 to 12 Bits
■ Converts Temperature to 12-Bit Digital Word in 750ms (max)
■ User-Definable (NV) Alarm Settings
■ Alarm Search Command Identifies and Addresses Devices Whose Temperature is Outside of Programmed Limits (Temperature Alarm Condition)
■ Available in 8-Pin μSOP Package
■ Software Compatible with the DS1822

APPLICATIONS
  Thermostatic Controls
  Industrial Systems
  Consumer Products
  Thermometers
  Thermally-Sensitive Systems