Datasheet > DS28EA00

DS28EA00

更新时间： 2024-10-02 03:11:31

品牌	Logo	应用领域
达拉斯 - DALLAS		/
页数	文件大小	规格书
29页	214K
描述
1-Wire Digital Thermometer with Sequence Detect and PIO

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DS28EA00 数据手册

DS28EA00

1-Wire Digital Thermometer

with Sequence Detect and PIO

www.maxim-ic.com

GENERAL DESCRIPTION

SPECIAL FEATURES

The DS28EA00 is a digital thermometer with 9-bit

(0.5 °C) to 12-bit (1/16 °C) resolution and alarm

function with nonvolatile (NV), user-programmable

upper and lower trigger points. Each DS28EA00 has

its unique 64-bit registration number that is factory-

programmed into the chip. Data is transferred serially

through the 1-Wire^®protocol, which requires only one

data line and a ground for communication. The

improved 1-Wire front end with hysteresis and glitch

filter enables the DS28EA00 to perform reliably in

large 1-Wire networks. Unlike other 1-Wire thermo-

meters, the DS28EA00 has two additional pins to

implement a sequence detect function. This feature

allows the user to discover the registration numbers

according to the physical device location in a chain,

e.g., to measure the temperature in a storage tower

at different height. If the sequence detect function is

not needed, these pins can be used as general-

purpose input or output. The DS28EA00 can derive

the power for its operation directly from the data line

(“parasite power”), eliminating the need for an

external power supply.

Digital Thermometer Measures Temperatures

from -40°C to +85°C

Thermometer Resolution is User-Selectable

from 9 to 12 Bits

Unique 1-Wire Interface Requires Only One

Port Pin for Communication

Each Device has a Unique 64-Bit Factory-

Lasered Registration Number

ROM Multidrop Capability Simplifies

Distributed Temperature-Sensing

Applications

Improved 1-Wire Interface with Hysteresis

and Glitch Filter

User-Definable Nonvolatile (NV) Alarm

Threshold Settings/User Bytes

Alarm Search Command to Quickly Identify

Devices Whose Temperature is Outside of

Programmed Limits

Standard and Overdrive 1-Wire Speed

Two General-Purpose Programmable IO (PIO)

Pins

Chain Function Sharing the PIO Pins to

Detect Physical Sequence of Devices in

Network

APPLICATIONS

Operating Range: 3.0V to 5.5V, -40°C to +85°C

Can be Powered from Data Line

8-Pin µSOP Package

Data Communication Equipment

Process Temperature Monitoring

HVAC Systems

ORDERING INFORMATION

TYPICAL OPERATING CIRCUIT

PART

TEMP RANGE

-40 to +85°C

PACKAGE

8-pin µSOP

Tape & Reel

V_DD

DS28EA00U+

DS28EA00U+T

1-Wire

Master

V_DD

PX.Y

+ Denotes lead-free package.

DS28EA00

PIOB PIOA

GND

DS28EA00

PIOB PIOA

GND

DS28EA00

PIOB PIOA

GND

(Micro-

controller)

PIN CONFIGURATION

V_DD

PIOB

PIOA

Schematic shows PIOs wired for sequence detect function.

GND

Commands, Registers, and Modes are capitalized for

clarity.

8 pin µSOP

Package Outline Drawing 21-0036

1-Wire is a registered trademark of Dallas Semiconductor.

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.

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与DS28EA00相关器件

型号	品牌	获取价格	描述	数据表
DS28EA00U+	DALLAS	获取价格	1-Wire Digital Thermometer with Sequence Detect and PIO
DS28EA00U+	MAXIM	获取价格	1-Wire Digital Thermometer with Sequence Detect and PIO
DS28EA00U+T	DALLAS	获取价格	1-Wire Digital Thermometer with Sequence Detect and PIO
DS28EA00U+TR	MAXIM	获取价格	1-Wire Digital Thermometer with Sequence Detect and PIO
DS28EC20	MAXIM	获取价格	20Kb 1-Wire EEPROM
DS28EC20	DALLAS	获取价格	20Kb 1-Wire EEPROM
DS28EC20	ADI	获取价格	20Kb 1-Wire EEPROM
DS28EC20 T	MAXIM	获取价格	DS28EC20_1203
DS28EC20_11	MAXIM	获取价格	20Kb 1-Wire EEPROM
DS28EC20_1203	MAXIM	获取价格	DS28EC20_1203

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