ZHCSNI6 march   2023 OPA928

ADVANCE INFORMATION  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4.     Thermal Information
    5. 6.4 Electrical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Guard Buffer
      2. 7.3.2 Thermal Protection
      3. 7.3.3 Capacitive Load and Stability
      4. 7.3.4 EMI Rejection
      5. 7.3.5 Common-Mode Voltage Range
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Contamination Considerations
      2. 8.1.2 Guarding Considerations
      3. 8.1.3 Humidity Considerations
      4. 8.1.4 Dielectric Relaxation
    2. 8.2 Typical Applications
      1. 8.2.1 High-Impedance (Hi-Z) Amplifier
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Transimpedance Amplifier
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
    3. 8.3 Power-Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Examples
  9. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
        1. 9.1.1.1 PSpice® for TI
        2. 9.1.1.2 TINA-TI™ 仿真软件（免费下载）
        3. 9.1.1.3 TI 参考设计
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 接收文档更新通知
    4. 9.4 支持资源
    5. 9.5 Trademarks
    6. 9.6 静电放电警告
    7. 9.7 术语表
  10. 10Mechanical, Packaging, and Orderable Information

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7.1 Overview

The OPA928 op amp is an ultra-low input bias current, high-precision, low-power, e-trim operational amplifier. This op amp provides extremely low input bias current (< 20 fA) across the entire industrial temperature range of −40ºC to 85ºC. In addition, the OPA928 operates from 4.5 V to 16 V, is unity-gain stable, and post-package trimmed to achieve very low offset and offset drift performance.

The amplifier features state-of-the art CMOS technology and advanced design features to achieve extremely low input bias current across a wide temperature range, wide input and output voltage ranges, high loop gain, and low, flat output impedance. The OPA928 strengths include a wide bandwidth of 2.5 MHz, low noise spectral density of 15 nV/√Hz, low 1/f noise of 1.4 μVPP, and low quiescent current of 400 μA. This combination of features make the OPA928 an excellent choice for interfacing very high impedance sensors, and photodiodes.