JAJSJN1A May   2023  – September 2023 TMP4718

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 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 I2C Interface Timing
    7. 7.7 Timing Diagrams
    8. 7.8 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 1.2-V Logic Compatible Inputs
      2. 8.3.2 Series Resistance Cancellation
      3. 8.3.3 Device Initialization, Resistor Decoding, and Default Temperature Conversion
      4. 8.3.4 Adjustable Default T_CRIT High-Temperature Limit
      5. 8.3.5 ALERT and T_CRIT Output
      6. 8.3.6 Fault Queue
      7. 8.3.7 Filtering
      8. 8.3.8 One-Shot Conversions
    4. 8.4 Device Functional Modes
      1. 8.4.1 Interrupt and Comparator Mode
        1. 8.4.1.1 Interrupt Mode
        2. 8.4.1.2 Comparator Mode
        3. 8.4.1.3 T_CRIT Output
      2. 8.4.2 Shutdown Mode
      3. 8.4.3 Continuous Conversion Mode
    5. 8.5 Programming
      1. 8.5.1 Temperature Data Format
      2. 8.5.2 I2C and SMBus Interface
      3. 8.5.3 Device Address
      4. 8.5.4 Bus Transactions
        1. 8.5.4.1 Writes
        2. 8.5.4.2 Reads
      5. 8.5.5 SMBus Alert Mode
    6. 8.6 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 Curves
    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 ドキュメントの更新通知を受け取る方法
    3. 10.3 サポート・リソース
    4. 10.4 Trademarks
    5. 10.5 静電気放電に関する注意事項
    6. 10.6 用語集
  12. 11Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

8.3.3 Device Initialization, Resistor Decoding, and Default Temperature Conversion

When VDD goes above VPOR (power-on reset threshold), the device initiates the power-on reset (POR) sequence and starts loading default configuration settings into the device from the memory. After the device initialization is complete, the device starts the ALERT and T_CRIT pin resistors decoding sequence and loads the T_CRIT high temperature limit decoded into the device. The device then starts default local and remote temperature conversion. The converted result and corresponding output (ALERT or T_CRIT) is asserted if the corresponding limit is crossed.

The device initialization, resistor decoding, and default conversion takes approximately 200 ms. During device initialization, the supply voltage VDD shall be hold stable and above VPOR (falling) to avoid any device misbehavior. During resistor decoding, the resistor pullup voltage shall also be kept stable to prevent wrong threshold from getting decoded. Figure 8-2 depicts the details timing sequence for the device initialization and default temperature conversion.

GUID-20230502-SS0I-D6WN-MR9D-B9JQ1VZ0NTHP-low.svgFigure 8-2 Device Initialization, Resistor Decoding, and Default Temperature Conversion Timing.