DS28EA00

更新时间： 2024-01-10 03:09:52

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
29页	290K
描述
1-Wire Digital Thermometer with Sequence Detect and PIO

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技术参数
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DS28EA00 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	TSSOP,	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	6 weeks
风险等级：	0.97	Samacsys Description：	Board Mount Temperature Sensors
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	S-PDSO-G8
JESD-609代码：	e3	长度：	3 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装形状：	SQUARE
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.1 mm
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	3 V
表面贴装：	YES	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	宽度：	3 mm

DS28EA00 数据手册

Rev 2; 4/09

1-Wire Digital Thermometer with

Sequence Detect and PIO

DS28EA0

General Description

Features

♦ Digital Thermometer Measures Temperatures

The DS28EA00 is a digital thermometer with 9-bit (0.5°C)

to 12-bit (1/16°C) resolution and alarm function with non-

volatile (NV), user-programmable upper and lower trigger

points. Each DS28EA00 has its own unique 64-bit regis-

tration number that is factory programmed into the chip.

from -40°C to +85°C

♦ Thermometer Resolution is User Selectable from

9 to 12 Bits

Data is transferred serially through the 1-Wire protocol,

♦ Unique 1-Wire Interface Requires Only One Port

which requires only one data line and a ground reference

for communication. The improved 1-Wire front-end with

hysteresis and glitch filter enables the DS28EA00 to per-

form reliably in large 1-Wire networks. Unlike other 1-Wire

thermometers, 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 out-

put. The DS28EA00 can derive the power for its operation

directly from the data line (“parasite power”), eliminating

the need for an external power supply.

Pin for Communication

♦ Each Device Has a Unique 64-Bit, Factory-

Lasered Registration Number

♦ Multidrop Capability Simplifies Distributed

Temperature-Sensing Applications

♦ Improved 1-Wire Interface with Hysteresis and

Glitch Filter

♦ User-Definable NV Alarm Threshold Settings/User

Bytes

♦ Alarm Search Command to Quickly Identify

Devices Whose Temperature is Outside of

Programmed Limits

Applications

♦ Standard and Overdrive 1-Wire Speed

Data Communication Equipment

♦ Two General-Purpose Programmable IO (PIO) Pins

Process Temperature Monitoring

HVAC Systems

♦ Chain Function Sharing the PIO Pins to Detect

Physical Sequence of Devices in Network

Ordering Information

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

♦ Can Be Powered from Data Line

♦ 8-Pin µSOP Package

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

DS28EA00U+

DS28EA00U+T&R

8 μSOP

Pin Configuration appears at end of data sheet.

+Denotes a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

Typical Operating Circuit

1-Wire

MASTER

PX. Y

DS28EA00

MICROCONTROLLER

PIOB

PIOA

PIOB

PIOA

PIOB

PIOA

GND

NOTE: SCHEMATIC SHOWS PIO PINS WIRED FOR SEQUENCE-DETECT FUNCTION.

1-Wire is a registered trademark of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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