DS28EA00
PRODUCTION1-Wire Digital Thermometer with Sequence Detect and PIO
First 1-Wire Digital Temperature Sensor with Chain-Mode Function and GPIO
- Part Models
- 2
- 1ku List Price
- Starting From $3.27
Part Details
- Digital Thermometer Measures Temperatures from -40°C to +85°C
- Thermometer Resolution is User-Selectable from 9 to 12 Bits
- Unique 1-Wire Interface Requires Only One Port Pin for Communication
- Each Device has a Unique 64-Bit Factory-Lasered Registration Number
- ROM Multidrop Capability Simplifies Distributed Temperature-Sensing Applications
- Improved 1-Wire Interface with Hysteresis and Glitch Filter
- User-Definable Nonvolatile (NV) Alarm Threshold Settings/User Bytes
- Alarm Search Command to Quickly Identify Devices Whose Temperature is Outside of Programmed Limits
- Standard and Overdrive 1-Wire Speed
- Two General-Purpose Programmable IO (PIO) Pins
- Chain Function Sharing the PIO Pins to Detect Physical Sequence of Devices in Network
- Operating Range: 3.0V to 5.5V, -40°C to +85°C
- Can be Powered from Data Line
- 8-Pin µSOP Package
The DS28EA00 is a digital thermometer with 9-bit (0.5°C) to 12-bit (1/16°C) resolution and alarm function with nonvolatile (NV), user-programmable upper and lower trigger points. Each DS28EA00 has its unique 64-bit registration number that is factory-programmed into the chip. Data is transferred serially through the 1-Wire® protocol, which requires only one data line and a ground for communication. The improved 1-Wire front end with hysteresis and glitch filter enables the DS28EA00 to perform reliably in large 1-Wire networks. Unlike other 1-Wire thermometers, the DS28EA00 has two additional pins to implement a sequence detect function. This feature allows the user to discover the registration numbers according to the physical device location in a chain, e.g., to measure the temperature in a storage tower at different height. If the sequence detect function is not needed, these pins can be used as general-purpose input or output. The DS28EA00 can derive the power for its operation directly from the data line ("parasite power"), eliminating the need for an external power supply.
Applications
- Any Rack-Based Electronic System
- Climate Control
- Data communication equipment
- Process Temperature Monitoring
- Servers
- Wireless Basestations
Documentation
Data Sheet 1
Reliability Data 1
Design Note 2
Technical Articles 7
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 |
|---|---|---|---|
| DS28EA00U+ | Micro-MAX, Thin Shrink Small-Outline | ||
| DS28EA00U+T&R | Micro-MAX, Thin Shrink Small-Outline |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Interface Transceivers & Isolators 3 | ||
| DS2480B | PRODUCTION | Serial to 1-Wire Line Driver |
| DS2482-800 | PRODUCTION | 8-Channel 1-Wire Master |
| DS2482-100 | PRODUCTION | Single-Channel 1-Wire Master |
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