JAJSDR5A August   2017  – January 2018 INA828

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      INA828の簡略化された内部回路図
      2.      入力オフセット電圧ドリフトの代表的な分布
  4. 4 改訂履歴
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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 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 Setting the Gain
        1. 7.3.1.1 Gain Drift
      2. 7.3.2 EMI Rejection
        1. Table 2. INA828 EMIRR for Frequencies of Interest
      3. 7.3.3 Input Common-Mode Range
      4. 7.3.4 Input Protection
      5. 7.3.5 Operating Voltage
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Reference Terminal
    2. 8.2 Input Bias Current Return Path
    3. 8.3 PCB Assembly Effects on Precision
    4. 8.4 Typical Application
      1. 8.4.1 Design Requirements
      2. 8.4.2 Detailed Design Procedure
      3. 8.4.3 Application Curves
    5. 8.5 Other Application Examples
      1. 8.5.1 Resistance Temperature Detector Interface
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 ドキュメントのサポート
      1. 11.1.1 関連資料
    2. 11.2 ドキュメントの更新通知を受け取る方法
    3. 11.3 コミュニティ・リソース
    4. 11.4 商標
    5. 11.5 静電気放電に関する注意事項
    6. 11.6 Glossary
  12. 12メカニカル、パッケージ、および注文情報

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

7.3.4 Input Protection

The inputs of the INA828 device are individually protected for voltages up to ±40 V. For example, a condition of –40 V on one input and 40 V on the other input does not cause damage. Internal circuitry on each input provides low series impedance under normal signal conditions. If the input is overloaded, the protection circuitry limits the input current to a value of approximately 8 mA.

INA828 ai_D004_SBOS792.gifFigure 59. Input Current Path During an Overvoltage Condition

During an input overvoltage condition, current flows through the input protection diodes into the power supplies, see Figure 59. If the power supplies are unable to sink current, then Zener diode clamps (ZD1 and ZD2 in Figure 59) must be placed on the power supplies to provide a current pathway to ground. Figure 60 illustrates the input current for input voltages from –40 V to +40 V when the INA828 is powered by ±15-V supplies.

INA828 C115_SBOS792.pngFigure 60. Input Current vs Input Overvoltage