SNIS209C July   2021  – June 2022 TMP126

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and 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 SPI Interface Timing
    7. 7.7 Timing Diagram
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Descriptions
      1. 8.3.1 Temperature Limits
      2. 8.3.2 Slew Rate Warning
      3. 8.3.3 Cyclic Redundancy Check (CRC)
      4. 8.3.4 NIST Traceability
      5. 8.3.5 Fast Measurement Intervals With No Self-Heating Concerns
    4. 8.4 Device Functional Modes
      1. 8.4.1 Continuous Conversion Mode
      2. 8.4.2 Shutdown Mode
      3. 8.4.3 One-Shot Mode
      4. 8.4.4 Interrupt and Comparator Mode
        1. 8.4.4.1 Interrupt Mode
        2. 8.4.4.2 Comparator Mode
    5. 8.5 Programming
      1. 8.5.1 Temperature Data Format
      2. 8.5.2 Serial Bus Interface
        1. 8.5.2.1 Command Word Structure
          1. 8.5.2.1.1 Don't Care
          2. 8.5.2.1.2 CRC Enable
          3. 8.5.2.1.3 CRC Data Block Length
          4. 8.5.2.1.4 Auto Increment
          5. 8.5.2.1.5 Read/Write
          6. 8.5.2.1.6 Sub-Address
        2. 8.5.2.2 Communication
        3. 8.5.2.3 Write Operations
        4. 8.5.2.4 Read Operations
        5. 8.5.2.5 Cyclic Redundancy Check (CRC)
          1. 8.5.2.5.1 Cyclic Redundancy Check Implementation
    6. 8.6 Register Map
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.1 Temperature Limits

The TMP126 includes a temperature limit warning that can be enabled or disabled in the configuration register. If enabled, at the end of every completed conversion the TMP126 will compare the result against the limits stored in the low limit register and the high limit register. When exceeding these limits the ALERT pin will be set. The ALERT pin behavior will change depending on which mode the device is configured to as described in the Interrupt and Comparator Mode section.

The Alert functionality can allow the system to set the desired operating thermal limits of the system with the TMP126 and allow autonomous monitoring of temperature without the need for the system to read the temperature. When a thermal limit is exceeded the system will receive a warning through the ALERT pin and can react accordingly to adjust the operating temperature back to within normal system operation.

GUID-3322B0F9-C622-4D5D-BF62-0A97FD909C3F-low.gif Figure 8-1 Temperature Limit Alert