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DS1822-PAR

Maxim Integrated
Part Number DS1822-PAR
Manufacturer Maxim Integrated
Description Econo 1-Wire Parasite-Power Digital Thermometer
Published Mar 26, 2020
Detailed Description www.maxim-ic.com FEATURES ƒ Unique 1-Wire® interface requires only one port pin for communication ƒ Derives power from d...
Datasheet PDF File DS1822-PAR PDF File

DS1822-PAR
DS1822-PAR

Overview
www.
maxim-ic.
com 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 temperature is outside of programmed limits (temperature alarm condition) ƒ Software compatible with the DS18B20-PAR ƒ Ideal for use in remote sensing applications (e.
g.
, temperature probes) that do not have a local power source GND DQ NC DS1822-PAR Econo 1-Wire Parasite-Power Digital Thermometer PIN ASSIGNMENT DALLAS 1822P 123 12 3 (BOTTOM VIEW) TO-92 (DS1822-PAR) PIN DESCRIPTION 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 (“parasite power”).
The DS1822-PAR communicates over a 1-Wire bus, which 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 +100°C and is accurate to ±2.
0°C over a range of -10°C to +85°C.
Each DS1822-PAR has a unique 64-bit identification code, which allows multiple DS1822-PARs to function on the same 1-Wire bus; thus, it is simple to use one microprocessor to control many DS1822-PARs distributed over a large area.
Applications that can benefit from this feature include HVAC environmental controls, temperature monitorin...


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