DS1822-PAR - Maxim Integrated

DS1822-PAR Econo 1-Wire Parasite-Power Digital Thermometer

GND - Ground DQ - Data In/Out NC - No Connect DESCRIPTION The DS1822-PAR digital thermometer provides 9- to 12-bit centigrade temperature measurements and has an alarm function with nonvolatile (NV) user-programmable upper and lower trigger points. The DS1822-PAR does not need an external power supply because it derives power directly from the data line (“p.

Features

ƒ Unique 1-Wire® interface requires only one port pin for communication ƒ Derives power from data line (“parasite power”)—does not need a local power supply ƒ Multidrop capability simplifies distributed temperature sensing applications ƒ Requires no external components ƒ ±2.0°C accuracy from -10°C to +85°C ƒ Measures temperatures from -55°C to +100°C (-67°F to +212°F) ƒ Thermometer resolution is user-selectable from 9 to 12 bits ƒ Converts temperature to 12-bit digital word in 750ms (max.) ƒ User-definable temperature alarm settings ƒ Alarm search command identifies and addresses devices whose.