DS1921G
RECOMMENDED FOR NEW DESIGNSThermochron iButton Device
- Part Models
- 1
- 1ku List Price
- Starting From $28.86
Part Details
- High Accuracy, Full-Featured Digital Temperature Logger Simplifies Temperature Data Collection and Dissemination of Electronic Temperature Record
- Accuracy ±1°C from -30°C to +70°C (See the Electrical Characteristics for Accuracy Specification)
- Digital Thermometer Measures Temperature in 0.5°C Increments
- Built-In Real-Time Clock (RTC) and Timer Has Accuracy of ±2 Minutes per Month from 0°C to +45°C
- Automatically Wakes Up and Measures Temperature at User-Programmable Intervals from 1 Minute to 255 Minutes
- Logs Consecutive Temperature Measurements in 2kB of Datalog Memory
- Records a Long-Term Temperature Histogram with 2.0°C Resolution
- Programmable Temperature High and Temperature Low Alarm Trip Points
- Records Up to 24 Timestamps and Durations When Temperature Leaves the Range Specified by the Trip Points
- Individually Calibrated in a NIST-Traceable Chamber
- Complies to Standard EN12830
- 512 Bytes of General-Purpose Battery-Backed SRAM
- 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
The Thermochron® iButton® device (DS1921G) 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, both as a direct storage of temperature values as well as in the form of a histogram. Up to 2048 temperature values taken at equidistant intervals ranging from 1 to 255min can be stored. The histogram provides 63 data bins with a resolution of 2.0°C. If the temperature leaves a user-programmable range, the DS1921G also records when this happened, for how long the temperature stayed outside the permitted range, and if the temperature was too high or too low. An additional 512 bytes of battery-backed SRAM allow storing information pertaining to the object to which the DS1921G is associated. Data is transferred serially through the 1-Wire® protocol, which requires only a single data lead and a ground return. Every DS1921G is factory lasered with a guaranteed unique, electrically readable, 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 DS1921G to be mounted on almost any object including containers, pallets, and bags.
Applications
- Temperature Logging in Cold Chain, Food Safety, Pharmaceutical, and Medical Products
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Application Note 6
Design Note 4
Technical Articles 17
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| DS1921G-F5# | <u>i</u>Button F5 MicroCan |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Evaluation Kits
Thermochron iButton Starter Kit