DS1922E_09 Datasheet, PDF (1/44 Pages) Maxim Integrated Products – High-Temperature Logger iButton with 8KB Data-Log Memory

19-4646; Rev 2; 6/09
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.