DS1821S/T&R

更新时间： 2024-11-21 02:55:07

品牌	Logo	应用领域
达拉斯 - DALLAS		监控
页数	文件大小	规格书
18页	455K
描述
Programmable Digital Thermostat and Thermometer

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数据手册

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DS1821S/T&R 数据手册

DS1821

Programmable Digital Thermostat and

Thermometer

www.maxim-ic.com

FEATURES

PIN ASSIGNMENT

Requires no external components

Unique 1-Wire^®interface requires only one

port pin for communication

Operates over a -55°C to +125°C (-67°F to

+257°F) temperature range

Functions as a standalone thermostat with

user-definable trip-points

GND

V_DD

DALLAS

DS1821

1 2 3

Provides 8-bit (1°C resolution) centigrade

temperature measurements

Accuracy is ±1°C over 0°C to +85°C range

Converts temperature to a digital word in 1

second (max)

8-pin 208-mil SO

(DS1821S)

Available in 3-pin PR35 and 8-pin SO

packages

Applications include thermostatic controls,

industrial systems, consumer products,

thermometers, or any thermally sensitive

system

(BOTTOM VIEW)

PR35

(DS1821)

PIN DESCRIPTION

GND

V_DD

- Ground

- Data In/Out and Thermostat Output

- Power Supply Voltage

- No Connect

DESCRIPTION

The DS1821 can function as a standalone thermostat with user-programmable trip-points or as 8-bit

temperature sensor with a 1-Wire digital interface. The thermostat trip-points are stored in nonvolatile

memory, so DS1821 units can be programmed prior to system insertion for true standalone operation.

The DS1821 has an operating temperature range of –55°C to +125°C and is accurate to ±1°C over a range

of 0°C to +85°C. Communication with the DS1821 is accomplished through the open-drain DQ pin; this

pin also serves as the thermostat output.

1-Wire is a registered trademark of Dallas Semiconductor Corp.,

a wholly owned subsidiary of Maxim Integrated Products, Inc.

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