SLOS887G September   2014  – May 2025 TMP112-Q1 , TMP112D-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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 (TMP112-Q1 Only)
    7. 6.7  Timing Requirements
    8. 6.8  Timing Diagrams
    9. 6.9  Typical Characteristics (TMP112-Q1)
    10. 6.10 Typical Application (TMP112D-Q1)
  8. 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 Target Mode Operation
          1. 7.3.2.4.1 Target Receiver Mode
          2. 7.3.2.4.2 Target 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 Continuous-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
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Calibrating for Improved Accuracy (TMP112-Q1 Only)
        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 (TMP112-Q1 Only)
        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 Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.4.1 Continuous-Conversion Mode

The default mode of the TMP112-Q1/TMP112D-Q1 device is continuous conversion mode. During continuous-conversion mode, the ADC performs continuous temperature conversions and stores each results to the temperature register, overwriting the result from the previous conversion. The conversion rate bits, CR1 and CR0, configure the TMP112-Q1/TMP112D-Q1 device for conversion rates of 0.25Hz, 1Hz, 4Hz, or 8Hz. The default rate is 4Hz. The TMP112-Q1 device has a typical conversion time of 26ms while TMP112D-Q1 has a typical conversion time of 10ms. To achieve different conversion rates, the TMP112-Q1/TMP112D-Q1 device makes a conversion and then powers down and waits for the appropriate delay set by CR1 and CR0. Table 7-5 lists the settings for CR1 and CR0.

Table 7-5 Conversion Rate Settings
CR1CR0CONVERSION RATE
000.25Hz
011Hz
104Hz (default)
118Hz

After a power up or general-call reset, the TMP112-Q1/TMP112D-Q1 device immediately begins a conversion as shown in Figure 7-7. The first result is available after 26ms (typical) for TMP112-Q1 and 10ms (typical) for TMP112D-Q1. The active quiescent current during conversion is 40μA (typical at 27°C) for TMP112-Q1 and 55μA (typical at 27°C) for TMP112D-Q1. The quiescent current during delay is 2.2μA (typical at 27°C) for TMP112-Q1 and 2.6μA (typical at 27°C) for TMP112D-Q1.

TMP112-Q1 TMP112D-Q1 Conversion Start
A. The delay is set by CR1 and CR0 bits in the configuration register.
Figure 7-7 Conversion Start