DS1922L Datasheet PDF

Part Number



iButton Temperature Loggers


Maxim Integrated

Total Page 30 Pages
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Download DS1922L Datasheet PDF

Features Datasheet pdf DS1922L/DS1922T iButton Temperature Log gers with 8KB Datalog Memory General D escription The iButton® temperature lo ggers (DS1922L/DS1922T) are rugged, sel f-sufficient systems that measure tempe rature and record the result in a prote cted memory section. The recording is d one at a user-defined rate. A total of 8192 8-bit readings or 4096 16-bit read ings, taken at equidistant intervals ra nging from 1s to 273hr, can be stored. Additionally, 512 bytes of SRAM store a pplicationspecific information and 64 b ytes store calibration data. A mission to collect data can be programmed to be gin immediately, after a user-defined d elay, or after a temperature alarm. Acc ess to the memory and control functio.
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DS1922L Datasheet
iButton Temperature Loggers
with 8KB Datalog Memory
General Description
The iButton® temperature loggers (DS1922L/DS1922T)
are rugged, self-sufficient systems that measure tempera-
ture and record 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
equidistant intervals ranging from 1s to 273hr, can be
stored. Additionally, 512 bytes of SRAM store application-
specific information and 64 bytes store calibration data. A
mission to collect data can be programmed to begin
immediately, after a user-defined delay, or after a tempera-
ture alarm. Access to the memory and control functions
can be password protected. The DS1922L/DS1922T are
configured and communicate with a host-computing
device through the serial 1-Wire® protocol, which requires
only a single data lead and a ground return. Each
DS1922L/DS1922T 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 hazards such as dirt, moisture,
and shock. Accessories permit the DS1922L/DS1922T to
be mounted on almost any object, including containers,
pallets, and bags.
High-Temperature Logging (Process Monitoring,
Industrial Temperature Monitoring)
Temperature Logging in Cold Chain, Food Safety, Bio
Science, and Pharmaceutical and Medical Products
Benefits and Features
High Accuracy, Full-Featured Digital Temperature
Logger Simplifies Temperature Data Collection and
Dissemination of Electronic Temperature Record
Temperature Accuracy of ±0.5°C from -10°C to
+65°C (DS1922L), ±0.5°C from +20°C to +75°C
(DS1922T), with Software Corrections
Measures Temperature with 8-Bit (0.5°C) or 11-Bit
(0.0625°C) Resolution
Operating Temperature Range: DS1922L: -40°C to
+85°C; DS1922T: 0°C to +125°C
Automatically Wakes Up, Measures Temperature,
and Stores Values in 8kB of Data-Log Memory in
8- or 16-Bit Format
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
512 Bytes of General-Purpose Memory Plus
64 Bytes of Calibration Memory
Two-Level Password Protection of All Memory and
Configuration Registers
Individually Calibrated in a NIST-Traceable
Complies to Standard EN12830
Rugged Construction Survives Harsh Environments
Water Resistant Enclosure (IP56) or Waterproof if
Placed Inside DS9107 iButton Capsule (Exceeds
Water Resistant 3 ATM Requirements)
CE, FCC, and UL913 Certifications
Simple Serial Port Interfaces to Most Microcontrollers
for Rapid Data Transfer
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
Quick Access to Alarmed Devices Through 1-Wire
Conditional Search Function
Ordering Information
-40°C to +85°C
F5 Can
0°C to +125°C
F5 Can
#Denotes a RoHS-compliant device that may include lead(Pb)
that is exempt under the RoHS requirements.
Examples of Accessories
Self-Stick Adhesive Pad
Multipurpose Clip
Mounting Lock Ring
Snap-in FOB
iButton Probe
Common iButton Device Features and Pin Configuration
appear at end of data sheet.
iButton and 1-Wire are registered trademarks of Maxim
Integrated Products, Inc.
19-4990; Rev 13; 3/15

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