ZHCSGC1F June   2017  – March 2021 OPA145 , OPA2145

PRODUCTION DATA  

  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. 6.4 Thermal Information: OPA145
    5. 6.5 Thermal Information: OPA2145
    6. 6.6 Electrical Characteristics: VS = 4.5 V to 36 V; ±2.25 V to ±18 V
    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 Capacitive Load and Stability
      2. 7.3.2 Output Current Limit
      3. 7.3.3 Noise Performance
      4. 7.3.4 Basic Noise Calculations
      5. 7.3.5 Phase-Reversal Protection
      6. 7.3.6 Electrical Overstress
      7. 7.3.7 EMI Rejection
      8. 7.3.8 EMIRR +IN Test Configuration
    4. 7.4 Device Functional Modes
  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
      3. 8.2.3 Application Curve
    3. 8.3 System Examples
      1. 8.3.1 16-Bit, 100-kSPS, Fully Differential Transimpedance Imaging and Measurement
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 TINA-TI™ SImulation Software (Free Download)
        2. 11.1.1.2 WEBENCH Filter Designer Tool
        3. 11.1.1.3 TI Precision Designs
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 支持资源
    5. 11.5 Trademarks
    6. 11.6 静电放电警告
    7. 11.7 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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7.1 Overview

The OPA145 and OPA2145 (OPAx145) operational amplifiers are part of a family of low-power JFET input amplifiers that feature superior drift performance and low input bias current. The rail-to-rail output swing and input range that includes V– allow designers to use the low-noise characteristics of JFET amplifier while also interfacing to modern, single-supply, precision, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). The OPAx145 achieve 5.5-MHz gain-bandwidth product and 20-V/μs slew rate and consume only 445 µA (typical) of quiescent current, making these devices an excellent choice for low-power applications. These devices operate on a single 4.5-V to 36-V supply or dual ±2.25-V to ±18-V supplies.

The OPAx145 are fully specified from –40°C to +125°C for use in the most challenging environments. The single-channel OPA145 is available in 5-pin SOT-23, 8-pin SOIC, and 8-pin VSSOP packages. The dual-channel OPA2145 is available in 8-pin SOIC and 8-pin VSSOP packages.

Section 7.2 shows the simplified diagram of the OPAx145.