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DS1631, DS1631A

High-Precision Digital Thermometer and Thermostat

High-Precision Digital Thermometers and Thermostats Provide 9, 10, 11, or 12-Bit Temperature Readings Over a -55°C to +125°C Range

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • Maximize System Accuracy in Broad Range of Thermal Management Applications
    • Operating Temperature Range: -55°C to +125°C (-67°F to +257°F)
    • DS1631 and DS1631A: ±0.5°C Accuracy over 0°C to +70°C Range
    • DS1731: ±1°C Accuracy over a -10°C to +85°C Range
    • User-Selectable Output Resolution from 9 Bits to 12 Bits
  • Reduce Cost with No External Components
  • Simplify Distributed Temperature-Sensing Applications with Multidrop Capability
    • Up to Eight Devices Can Operate on a 2-Wire Bus
  • Flexible and Nonvolatile User-Defined Thermostatic Modes with Custom Hysteresis
  • Available in 8-Pin µSOP and SO (DS1631 and DS1631A Only) and the 8-Pin DIP (DS1631 Only) Packages

Applications/Uses

  • Medical
  • Networking
  • Personal Computing
  • Routers/Switches
  • Test Measurement Systems
  • Wireless Base Stations

Description

The DS1631, DS1631A, and DS1731 digital thermometers provide 9, 10, 11, or 12-bit temperature readings over a -55°C to +125°C range. The DS1631 and DS1631A thermometer accuracy is ±0.5°C from 0°C to +70°C with 3.0V ≤ VDD ≤ 5.5V, and the DS1731 accuracy is ±1°C from -10°C to +85°C with 3.0V ≤ VDD ≤ 5.5V. The thermostat on all three devices provides custom hysteresis with user-defined trip points (TH and TL). The TH and TL registers and thermometer configuration settings are stored in NV EEPROM so they can be programmed prior to installation. In addition, the DS1631A automatically begins taking temperature measurements at power-up, which allows it to function as a stand-alone thermostat.

Simplified Block Diagram

DS1631, DS1631A, DS1731: Functional Diagram DS1631, DS1631A, DS1731: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .