SBOS371B August   2006  – October 2014 TMP401

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics: V+ = 3 V to 5.5 V
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Standard and Extended Temperature Measurement Range
      2. 7.3.2 Remote Sensing
    4. 7.4 Device Functional Modes
      1. 7.4.1 SMBus Alert Function
      2. 7.4.2 THERM (Pin 4) and ALERT/THERM2 (Pin 6)
      3. 7.4.3 Sensor Fault
      4. 7.4.4 High-Speed Mode
      5. 7.4.5 Shutdown Mode (SD)
      6. 7.4.6 One-Shot Conversion
      7. 7.4.7 General-Call Reset
    5. 7.5 Programming
      1. 7.5.1 Bus Overview
      2. 7.5.2 Serial Interface
      3. 7.5.3 Serial Bus Address
      4. 7.5.4 Read and Write Operations
      5. 7.5.5 Timeout Function
      6. 7.5.6 Timing Diagrams
    6. 7.6 Register Maps
      1. 7.6.1  Pointer Register
      2. 7.6.2  Temperature Registers
      3. 7.6.3  Limit Registers
      4. 7.6.4  Status Register
      5. 7.6.5  Configuration Register
      6. 7.6.6  Resolution Register
      7. 7.6.7  Conversion Rate Register
      8. 7.6.8  Identification Registers
      9. 7.6.9  Consecutive Alert Register
      10. 7.6.10 THERM Hysteresis Register
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Filtering
      3. 8.2.3 Application Curves
        1. 8.2.3.1 Series Resistance Cancellation
        2. 8.2.3.2 Differential Input Capacitance
  9. 9 Power-Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Measurement Accuracy and Thermal Considerations
      2. 10.1.2 Layout Considerations
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

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9 Power-Supply Recommendations

The TMP401 device operates with power supply in the range of 3.0 V to 5.5 V. The device is optimized for operation at a 5-V supply but can measure temperature accurately in the full supply range. Refer to the TELOCAL and TEREMOTE versus supply parameter in the Electrical Characteristics table for more information about the power supply affect on the accuracy of the device.

A power-supply bypass capacitor is required for proper operation. Place this capacitor as close as possible to the supply and ground pins of the device. A typical value for this supply bypass capacitor is 0.1 μF. Applications with noisy or high-impedance power supplies may require additional decoupling capacitors to reject power-supply noise.
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