SLOS887E September   2014  – December 2018 TMP112-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
    1.     Simplified Schematic
  3. Description
    1.     Block Diagram
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Specifications for User-Calibrated Systems
    7. 6.7 Timing Requirements
    8. 6.8 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Digital Temperature Output
      2. 7.3.2 Serial Interface
        1. 7.3.2.1 Bus Overview
        2. 7.3.2.2 Serial Bus Address
        3. 7.3.2.3 Writing and Reading Operation
        4. 7.3.2.4 Slave Mode Operation
          1. 7.3.2.4.1 Slave Receiver Mode
          2. 7.3.2.4.2 Slave Transmitter Mode
        5. 7.3.2.5 SMBus Alert Function
        6. 7.3.2.6 General Call
        7. 7.3.2.7 High-Speed (Hs) Mode
        8. 7.3.2.8 Timeout Function
        9. 7.3.2.9 Timing Diagrams
          1. 7.3.2.9.1 Two-Wire Timing Diagrams
    4. 7.4 Device Functional Modes
      1. 7.4.1 Continuos-Conversion Mode
      2. 7.4.2 Extended Mode (EM)
      3. 7.4.3 Shutdown Mode (SD)
      4. 7.4.4 One-Shot and Conversion Ready Mode (OS)
      5. 7.4.5 Thermostat Mode (TM)
        1. 7.4.5.1 Comparator Mode (TM = 0)
        2. 7.4.5.2 Interrupt Mode (TM = 1)
    5. 7.5 Programming
      1. 7.5.1 Pointer Register
      2. 7.5.2 Temperature Register
      3. 7.5.3 Configuration Register
        1. 7.5.3.1 Shutdown Mode (SD)
        2. 7.5.3.2 Thermostat Mode (TM)
        3. 7.5.3.3 Polarity (POL)
        4. 7.5.3.4 Fault Queue (F1/F0)
        5. 7.5.3.5 Converter Resolution (R1 and R0)
        6. 7.5.3.6 One-Shot (OS)
        7. 7.5.3.7 Extended Mode (EM)
        8. 7.5.3.8 Alert (AL)
        9. 7.5.3.9 Conversion Rate (CR)
      4. 7.5.4 High- and Low-Limit Registers
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Calibrating for Improved Accuracy
        1. 8.1.1.1 Example 1: Finding Worst-Case Accuracy From –15°C to 50°C
        2. 8.1.1.2 Example 2: Finding Worst-Case Accuracy From 25°C to 100°C
      2. 8.1.2 Using The Slope Specifications With a 1-Point Calibration
        1. 8.1.2.1 Power Supply-Level Contribution to Accuracy
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

Calibrating for Improved Accuracy

Many temperature monitoring applications require better than 0.5°C accuracy over a limited temperature range. Knowing the offset of a temperature sensor at a given temperature in conjunction with the average temperature span (slope) error over a fixed range makes achieving this improved accuracy possible.

The TMP112-Q1 device has three distinct slope regions that conservatively approximate the inherent curvature. The following lists the three distinct slope regions:

  1. Slope1 applies over –40°C to 25°C
  2. Slope2 applies over 25°C to 85°C
  3. Slope3 applies over 85°C to 125°C

The Specifications for User-Calibrated Systems table defines these slopes which are also shown in Figure 17.

NOTE

Each slope listed in the Specifications for User-Calibrated Systems table is increasing with respect to 25°C.

TMP112-Q1 ai_acc_slope-tmp_bos473.gifFigure 17. Accuracy and Slope Curves versus Temperature

Use Equation 1 to calculate the worst-case accuracy at a specific temperature.

Equation 1. TMP112-Q1 q_tmp_acc_bos473.gif