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

8.3.1 HYSTSET0, HYSTSET1 and SOH Functionality

The TMP303A temperature trip window resides within the range of 0°C to 60°C, the TMP303B within 0°C to 55°C, the TMP303C within –20°C to 60°C, the TMP303D within –15°C to 125°C, the TMP303E within 0°C to 70°C, the TMP303F within 0°C to 80°C, and the TMP303G within 0°C to 90°C. When any of these trip thresholds is crossed, the output (OUT) changes state from low to high. OUT does not return to its original low state until the temperature crosses the hysteresis threshold and returns within the range of the temperature trip window.

As an example, if the TMP303A is configured with a 10°C hysteresis window (that is, HYSTSET0 = HYSTSET1 = VS), the output does not return to its low state until the temperature either crosses (TL + hysteresis) = 10°C or (TH – hysteresis) = 50°C. The Set Output High (SOH) pin is intended to add test functionality to verify the connectivity of the output (OUT) pin to the system controller or other temperature response system. The SOH pin is internally pulled down to ground with a 100-kΩ resistor. If the SOH pin is grounded or left floating, it has no effect on the behavior of the TMP303A. If the SOH pin is pulled high, the TMP303A immediately forces the output high, regardless of temperature.

NOTE

This response occurs even if the temperature falls within the 0°C to 60°C temperature window.

Figure 10 shows this design in graphical form.

TMP303 ai_output_xfer_bos486.gifFigure 10. TMP303A Output Transfer Curves With Hysteresis Change from 10°C to 5°C and SOH Functionality