SBOS486I July   2009  – December 2018 TMP303

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      TMP303 Functional Block Diagram
      2.      Typical Trip Threshold Accuracy at -20°C to 125°C
  4. 4 Revision History
  5. 5 Device Options
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 HYSTSET0, HYSTSET1 and SOH Functionality
      2. 8.3.2 TMP303 Power Up and Timing
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 TMP303 Typical Configuration
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 TMP303 With Switches
      3. 9.2.3 Simple Fan Controller
      4. 9.2.4 Wireless Fixed Temperature Heat Detector
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.4 Wireless Fixed Temperature Heat Detector

Heat detectors are needed in building automation. Conventional heat detectors need cables to supply power and send the information back to a central system. Adding cables can be very costly and technically challenging in old buildings, this leads to wireless battery operated heat detectors as preferred solutions. Running on battery requires designing a very low power system for long haul. TMP303 can be used to design a low power heat detector due to its very low quiescent current (5 µA maximum). The TMP303 device does not require any additional components and can be interfaced with the MCU using only one GPIO. As an example, a wireless transceiver with internal MCU can be used to monitor the TMP303 and communicate with a central system or turn on an alarm in case of temperatures exceeding the trip-point. Figure 18 shows typical connections.

TMP303 TMP303_HeatDetector.gifFigure 18. Wireless Fixed Temperature Heat Detector