DS1922E(2008) 查看數據表（PDF） - Maxim Integrated

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DS1922E
(Rev.:2008)

High-Temperature Logger iButton with 8KB Data-Log Memory

Maxim Integrated 

Rev 1; 10/08

High-Temperature Logger iButton with 8KB

Data-Log Memory

General Description

The DS1922E temperature logger iButton® is a rugged,

self-sufficient system that measures temperature and

records the result in a protected memory section. The

recording is done at a user-defined rate. A total of 8192

8-bit readings or 4096 16-bit readings, taken at equidis-

tant intervals ranging from 1s to 273hr, can be stored.

Additionally, 576 bytes of SRAM store application-spe-

cific information. A mission to collect data can be pro-

grammed to begin immediately, after a user-defined

delay, or after a temperature alarm. Access to the

memory and control functions can be password pro-

tected. The DS1922E is configured and communicates

with a host-computing device through the serial 1-Wire®

protocol, which requires only a single data lead and a

ground return. Every DS1922E is factory lasered with a

guaranteed unique 64-bit registration number that

allows for absolute traceability. The durable stainless-

steel package is highly resistant to environmental haz-

ards such as dirt, moisture, and shock.

Applications

High-Temperature Logging (Process Monitoring,

Industrial Temperature Monitoring)

Steam Sterilization

Features

♦ Automatically Wakes Up, Measures Temperature,

and Stores Values in 8KB of Data-Log Memory in

8- or 16-Bit Format

♦ Digital Thermometer Measures Temperature with

8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution

♦ Temperature Accuracy: ±1.5°C from +110°C to

+140°C, ±7°C typical from +15°C to +110°C

♦ Water Resistant or Waterproof if Placed Inside

DS9107 iButton Capsule (Exceeds Water

Resistant 3 ATM Requirements)

♦ Sampling Rate from 1s Up to 273hr

♦ Programmable High and Low Trip Points for

Temperature Alarms

♦ Programmable Recording Start Delay After Elapsed

Time or Upon a Temperature Alarm Trip Point

♦ Quick Access to Alarmed Devices Through 1-Wire

Conditional Search Function

♦ 576 Bytes of General-Purpose Memory

♦ Two-Level Password Protection of All Memory

and Configuration Registers

iButton and 1-Wire are registered trademarks of Maxim

Integrated Products, Inc.

♦ Communicates to Host with a Single Digital Signal

Up to 15.4kbps at Standard Speed or Up to

125kbps in Overdrive Mode Using 1-Wire Protocol

♦ Operating Temperature Range: +15°C to +140°C

Common iButton Features

♦ Digital Identification and Information by

Momentary Contact

♦ Unique Factory-Lasered 64-Bit Registration Number

Ensures Error-Free Device Selection and Absolute

Traceability Because No Two Parts Are Alike

♦ Built-In Multidrop Controller for 1-Wire Net

♦ Chip-Based Data Carrier Compactly Stores

Information

♦ Data Can Be Accessed While Affixed to Object

♦ Button Shape is Self-Aligning with Cup-Shaped

Probes

♦ Durable Stainless-Steel Case Engraved with

Registration Number Withstands Harsh

Environments

♦ Easily Affixed with Self-Stick Adhesive Backing,

Latched by Its Flange, or Locked with a Ring

Pressed Onto Its Rim

♦ Presence Detector Acknowledges When Reader

First Applies Voltage

♦ Meets UL 913 (4th Edit.); Intrinsically Safe

Apparatus: Approved Under Entity Concept for

Use in Class I, Division 1, Group A, B, C, and D

Locations*

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

DS1922E-F5#

+15°C to +140°C

F5 iButton

# Denotes a RoHS-compliant device that may include lead(Pb)

that is exempt under the RoHS requirements.

Examples of Accessories

PART

DS9093RA

DS9107

DS9490B

ACCESSORY

Mounting Lock Ring

iButton Capsule

USB to 1-Wire Adapter

Pin Configuration appears at end of data sheet.

*Application pending.

________________________________________________________________ Maxim Integrated Products 1

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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