SBOSAJ7A October   2025  – December 2025 TMP4719

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 I2C Interface Timing
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Device Initialization and Default Temperature Conversion
      2. 7.3.2 Series Resistance Cancellation
      3. 7.3.3 ALERT and T_CRIT Output
      4. 7.3.4 1.2V Logic Compatible Inputs
      5. 7.3.5 Digital Filter
      6. 7.3.6 One-Shot Conversions
    4. 7.4 Device Functional Modes
      1. 7.4.1 Interrupt and Comparator Mode
        1. 7.4.1.1 Interrupt Mode
        2. 7.4.1.2 Comparator Mode
        3. 7.4.1.3 T_CRIT Output
      2. 7.4.2 Shutdown Mode
      3. 7.4.3 Continuous Conversion Mode
    5. 7.5 Programming
      1. 7.5.1 Temperature Data Format
      2. 7.5.2 I2C and SMBus Interface
      3. 7.5.3 Serial Bus Address
      4. 7.5.4 Bus Transactions
        1. 7.5.4.1 Writes
        2. 7.5.4.2 Reads
      5. 7.5.5 SMBus Alert Mode
  9. 8 Register Map
  10. 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
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

7.3.5 Digital Filter

Remote junction temperature sensors are typically implemented in a noisy environment. Noise is most often created by fast digital signals that can corrupt measurements. A digital filter is available for the remote temperature measurements to reduce the effect of noise. This filter is programmable and has two levels when enabled. Level 1 performs a moving average of four consecutive samples. Level 2 performs a moving average of eight consecutive samples. After POR, the output of the digital filter starts with a default ZERO without previous data. The output of the digital filter is stored in the remote temperature result register, and the temperature limits are compared to this value. The filter responses to impulse and step inputs are shown in Figure 7-3 and Figure 7-4, respectively. The filter can be enabled or disabled by programming the desired levels in register settings. The digital filter is disabled by default.

The averages are cleared after the filter is set to 00h. Filtering can be used with both continuous conversions and one-shot conversions.

TMP4719 Filter Response to Impulse InputsFigure 7-3 Filter Response to Impulse Inputs
TMP4719 Filter Response to Step InputsFigure 7-4 Filter Response to Step Inputs

In addition to the built-in digital filter of the device, TI recommends the user add an external capacitor between the DP and DN pins on the remote channel. The capacitor acts as a bypass filter to help reduce high-frequency EMI noise when the device is operating in a noisy environment. The recommended optimal value for the capacitor is 470pF, and the value must not exceed 3nF to allow proper operation of the temperature sensor.