ZHCSPF9B December   2022  – September 2023 TLV2365 , TLV365

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Device Comparison Table
  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 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 Rail-to-Rail Input
      2. 8.3.2 Input and ESD Protection
      3. 8.3.3 Driving Capacitive Loads
      4. 8.3.4 Active Filter
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Overdrive Recovery Performance
      2. 9.1.2 Achieving an Output Level of Zero Volts
    2. 9.2 Typical Applications
      1. 9.2.1 Second-Order Low-Pass Filter
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
      2. 9.2.2 ADC Driver and Reference Buffer
    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 Device Support
      1. 10.1.1 Development Support
        1. 10.1.1.1 PSpice® for TI
        2. 10.1.1.2 TINA-TI™ 仿真软件（免费下载）
        3. 10.1.1.3 DIP-Adapter-EVM
        4. 10.1.1.4 DIYAMP-EVM
        5. 10.1.1.5 TI 参考设计
        6. 10.1.1.6 滤波器设计工具
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 接收文档更新通知
    4. 10.4 支持资源
    5. 10.5 Trademarks
    6. 10.6 静电放电警告
    7. 10.7 术语表
  12. 11Mechanical, Packaging, and Orderable Information

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9.1.2 Achieving an Output Level of Zero Volts

Certain single-supply applications require the op‑amp output to swing from 0 V to a positive full-scale voltage and have high accuracy. An example is an op amp employed to drive a single-supply ADC having an input range from 0 V to 3.3 V. Rail-to-rail output amplifiers with very light output loading can achieve an output level within few millivolts of 0 V (or V+ at the high end), but not true 0 V. Furthermore, the deviation from 0 V only becomes greater as the required load current increases. This increased deviation is a result of limitations of the CMOS output stage.

When a pulldown resistor is connected from the amplifier output to a negative voltage source, the TLVx365 can achieve an output level of 0 V, and even a few millivolts below 0 V. Figure 9-3 shows a circuit using this technique.

GUID-20230613-SS0I-BVLK-WFFR-53X2WQDFNT2G-low.gif Figure 9-3 Swing-to-Ground

A pulldown current of approximately 500 μA is required when TLVx365 is connected as a unity-gain buffer. Pulldown resistor RL is calculated from RL = [(VO − VNEG) / (500 μA)].

Figure 9-33 shows the offset voltage vs output swing.

GUID-20221215-SS0I-VLMD-J9BF-PQJF84DWP9M2-low.svg
VS = ±2.75 V
Figure 9-4 Offset Voltage vs Output Swing