Unique 1–WireTM interface requires only one port pin
Multidrop capability simplifies distributed temperature
Requires no external components
Can be powered from data line
Zero standby power required
Measures temperatures from –55°C to +125°C in
0.5°C increments. Fahrenheit equivalent is –67°F to
+257°F in 0.9°F increments
Temperature is read as a 9–bit digital value.
Converts temperature to digital word in 200 ms (typ.)
User–definable, nonvolatile temperature alarm settings
Alarm search command identifies and addresses
devices whose temperature is outside of
Thermometers, or any thermally sensitive system
The DS1820 Digital Thermometer provides 9–bit temperature
readings which indicate the temperature of the
Information is sent to/from the DS1820 over a 1–Wire
interface, so that only one wire (and ground) needs to be
connected from a central microprocessor to a DS1820.
Power for reading, writing, and performing temperature
conversions can be derived from the data line itself with
no need for an external power source.