DS1820 1–WireTM Digital Thermometer
FEATURES
Unique 1–WireTM 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
Zero standby power required
Measures temperatures from –55C to +125C in0.5C increments.Fahrenheit equivalent is –67F to+257F in 0.9F 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 programmed limits (temperature alarm condition)
Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system
