DS1922L

iButton Temperature Loggers with 8KB Data-Log Memory


Description

The iButton® temperature loggers (DS1922L/T) are rugged, self-sufficient systems that measure temperature 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 273hrs can be stored. In addition to this, there are 512 bytes of SRAM for storing application-specific information and 64 bytes for calibration data. A mission to collect data can be programmed to begin immediately, or after a user-defined delay or after a temperature alarm. Access to the memory and control functions can be password protected. The DS1922L/T 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 DS1922L/T 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/T to be mounted on almost any object, including containers, pallets, and bags.

While all iButton data loggers are calibrated/validated against NIST traceable reference devices, Maxim offers a web application to generate validation certificates for the DS1922L/T data loggers. Input is an iButton registration number (or list of numbers) and the output is a validation certificate in PDF format.
iButton Temperature Logger iButton Temperature Logger Enlarge+

Key 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 Chamber
    • 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

Applications/Uses

  • High-Temperature Logging (Process Monitoring, Industrial Temperature Monitoring)
  • Temperature Logging in Cold Chain, Food Safety, Bio Science, and Pharmaceutical and Medical Products
Part Number Interface Technology Applications Usage Memory Type Memory Size Data Logger Type Temp. Readings Oper. Temp.
(°C)
Budgetary
Price
See Notes
DS1922L  1-Wire iButton Asset Management Multi Use NV SRAM 512 Bytes Temperature 8192 -40 to +85 $41.14 @1k
DS1922T 
Asset Management
Industrial Monitoring
Process Monitoring
0 to +125 $62.68 @1k
See All Data Loggers (10)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

App Note 5917 Instructions for Compiling the OneWireViewer for Linux
App Note 5916 iButton Mission Data Recovery: memlog User Guide
App Note 5705 Interface 1-Wire USB Adapter with Android
App Note 5507 Understanding the DS1WM Synthesizable 1-Wire Bus Master
Tutorial 5405 Choosing the Logger iButton That's Right for You
App Note 5335 Determining the Mission Parameters for Temperature Logger iButton® Devices
App Note 5057 OneWireViewer Tips and Tricks
App Note 4629 iButton Data-Logger Calibration and NIST Certificate FAQs
App Note 4506 Alternatives to the DS1994L 4Kb Plus Time Memory iButton®
Reference Schematic 4477 Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note 4126 Understanding the IP (Ingress Protection) Ratings of iButton Data Loggers and Capsule
App Note 3892 Overview of iButton® Sensors and Temperature/Humidity Data Loggers
App Note 3809 Exporting DS192x Logger Data from the OneWireViewer into Excel
App Note 3808 What Is an iButton Device?
App Note 3761 DS1922/DS1923 Battery Gas Gauge
App Note 1100 White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note 159 Software Methods to Achieve Robust 1-Wire® Communication in iButton® Applications
App Note 155 1-Wire Software Resource Guide Device Description
Tutorial 148 Guidelines for Reliable Long Line 1-Wire Networks
App Note 126 1-Wire Communication Through Software
App Note 114 1-Wire File Structure
App Note 74 Reading and Writing 1-Wire® Devices Through Serial Interfaces

Quality and Environmental Data

Product Reliability Reports: DS1922L.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Related Resources

Type ID PDF Title
App Note 5917 Instructions for Compiling the OneWireViewer for Linux
App Note 5916 iButton Mission Data Recovery: memlog User Guide
App Note 5705 Interface 1-Wire USB Adapter with Android
App Note 5507 Understanding the DS1WM Synthesizable 1-Wire Bus Master
Tutorial 5405 Choosing the Logger iButton That's Right for You
App Note 5335 Determining the Mission Parameters for Temperature Logger iButton® Devices
App Note 5057 OneWireViewer Tips and Tricks
App Note 4629 iButton Data-Logger Calibration and NIST Certificate FAQs
App Note 4506 Alternatives to the DS1994L 4Kb Plus Time Memory iButton®
Reference Schematic 4477 Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note 4126 Understanding the IP (Ingress Protection) Ratings of iButton Data Loggers and Capsule
App Note 3892 Overview of iButton® Sensors and Temperature/Humidity Data Loggers
App Note 3809 Exporting DS192x Logger Data from the OneWireViewer into Excel
App Note 3808 What Is an iButton Device?
App Note 3761 DS1922/DS1923 Battery Gas Gauge
App Note 1100 White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note 159 Software Methods to Achieve Robust 1-Wire® Communication in iButton® Applications
App Note 155 1-Wire Software Resource Guide Device Description
Tutorial 148 Guidelines for Reliable Long Line 1-Wire Networks
App Note 126 1-Wire Communication Through Software
App Note 114 1-Wire File Structure
App Note 74 Reading and Writing 1-Wire® Devices Through Serial Interfaces