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DS1922E：iButton High-Temperature Logger with 8KB Data-Log Memory

Industry's Smallest Low-Cost Stand-Alone Data-Logger Measuring and Logging Up to 140°C

The iButton® high-temperature logger (DS1922E) 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 equidistant intervals ranging from 1s to 273hr, can be stored. Additionally, 576 bytes of SRAM store application-specific information. A mission to collect data can be programmed to begin immediately, after a user-defined delay, or after a temperature alarm. Access to the memory and control functions can be password protected. 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 hazards such as dirt, moisture, and shock. 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.

Key Features High Accuracy, Full-Featured Digital Temperature Logger Simplifies Temperature Data Collection and Dissemination of Electronic Temperature Record Temperature Accuracy: ±1.5°C from +110°C to +140°C, ±7°C typical from +15°C to +110°C Measures Temperature with 8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution Operating Temperature Range: +15°C to +140°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 576 Bytes of General-Purpose Memory Two-Level Password Protection of All Memory and Configuration Registers Rugged Construction Survives Harsh Environments Water Resistant or Waterproof if Placed Inside DS9107 iButton Capsule (Exceeds Water Resistant 3 ATM Requirements) 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

DS1922E: Block Diagram Applications/Uses High-temperature Logging (Process Monitoring, Industrial Temperature Monitoring) Steam sterilization

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