Datasheet > DS1822-PAR_07

DS1822-PAR_07

更新时间： 2024-11-24 09:56:11

品牌	Logo	应用领域
达拉斯 - DALLAS		/
页数	文件大小	规格书
19页	207K
描述
Econo 1-Wire Parasite-Power Digital Thermometer

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数据手册

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DS1822-PAR_07 数据手册

DS1822-PAR

Econo 1-Wire Parasite-Power

Digital Thermometer

www.maxim-ic.com

FEATURES

PIN ASSIGNMENT

Unique 1-Wire^®interface requires only one

port pin for communication

DALLAS

1822P

Derives power from data line (“parasite

power”)—does not need a local power supply

Multidrop capability simplifies distributed

temperature sensing applications

1 2 3

Requires no external components

±2.0°C accuracy from -10°C to +85°C

Measures temperatures from -55°C to +100°C

(-67°F to +212°F)

Thermometer resolution is user-selectable

from 9 to 12 bits

Converts temperature to 12-bit digital word in

750ms (max.)

User-definable temperature alarm settings

Alarm search command identifies and

addresses devices whose temperature is

outside of programmed limits (temperature

alarm condition)

(BOTTOM VIEW)

Software compatible with the DS18B20-PAR

Ideal for use in remote sensing applications

(e.g., temperature probes) that do not have a

local power source

TO-92

(DS1822-PAR)

PIN DESCRIPTION

GND - Ground

- Data In/Out

- 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 monitoring systems inside buildings, equipment or

machinery, and process monitoring and control systems.

1-Wire is a registered trademark of Dallas Semiconductor.

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101107

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