ZHCS228A June   2011  – February 2024 OPA564-Q1

PRODUCTION DATA  

  1.   1
  2. 特性
  3. 应用
  4. 说明
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. 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
  8. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Adjustable Current Limit
        1. 7.3.1.1 Setting the Current Limit
      2. 7.3.2 Enable and Shutdown (E/S) Pin
      3. 7.3.3 Input Protection
      4. 7.3.4 Output Shutdown
      5. 7.3.5 Microcontroller Compatibility
      6. 7.3.6 Current Limit Flag
      7. 7.3.7 Thermal Protection
      8. 7.3.8 Junction Temperature Measurement Using TSENSE
    4. 7.4 Device Functional Modes
  9. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Basic Configuration
      2. 8.1.2 Output-Stage Compensation
      3. 8.1.3 Output Protection
      4. 8.1.4 Power Dissipation and Safe Operating Area
    2. 8.2 Typical Applications
      1. 8.2.1 Improved Howland Current Pump
      2. 8.2.2 Programmable Power Supply
      3. 8.2.3 Powerline Communication
      4. 8.2.4 Motor-Drive Circuit
      5. 8.2.5 DC Motor-Speed Controller (Without Tachometer)
      6. 8.2.6 Generating VDIG
      7. 8.2.7 Temperature Measurement
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Thermally Enhanced PowerPAD™ Integrated Circuit Package
          1. 8.4.1.1.1 Bottom-Side Thermal Pad Assembly Process
  10. Device and Documentation Support
    1. 9.1 接收文档更新通知
    2. 9.2 支持资源
    3. 9.3 Trademarks
    4. 9.4 静电放电警告
    5. 9.5 术语表
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

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Input Protection

Electrostatic discharge (ESD) protection followed by back-to-back diodes and input resistors (see Figure 7-7) are used for input protection on the OPA564-Q1. Exceeding the turn-on threshold of these diodes, as in a pulse condition, can cause current to flow through the input protection diodes because of the finite slew rate of the amplifier. If the input current is not limited, the back-to-back diodes and the input devices can be destroyed. Sources of high input current can also cause subtle damage to the amplifier. Although the unit can still function, important parameters such as input offset voltage, drift, and noise can shift.

When using the OPA564-Q1 as a unity-gain buffer (follower), as an inverting amplifier, or in shutdown mode, limit the input voltage between the input terminals (+IN and –IN) so that the voltage does not exceed 0.5V. Maintain this condition across the entire common-mode range from V– to V+. If the inputs exceed either supply rail, limit the current to 10mA through the ESD protection diodes. During excursions past the rails, limit the voltage across the input terminals. If necessary, add external back-to-back diodes between +IN and –IN to maintain the 0.5V requirement between these connections.