ZHCSH86B December   2017  – February 2019 LMH5401-SP

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      LMH5401-SP 小信号频率响应
      2.      LMH5401-SP 驱动 ADC12D1620QML
  4. 4 修订历史记录
  5. 5 说明 （续）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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: VS = 5 V
    6. 7.6 Electrical Characteristics: VS = 3.3 V
    7. 7.7 Typical Characteristics: 5 V
    8. 7.8 Typical Characteristics: 3.3 V
  8. 8 Parameter Measurement Information
    1. 8.1  Output Reference Nodes and Gain Nomenclature
    2. 8.2  ATE Testing and DC Measurements
    3. 8.3  Frequency Response
    4. 8.4  S-Parameters
    5. 8.5  Frequency Response with Capacitive Load
    6. 8.6  Distortion
    7. 8.7  Noise Figure
    8. 8.8  Pulse Response, Slew Rate, and Overdrive Recovery
    9. 8.9  Power Down
    10. 8.10 VCM Frequency Response
    11. 8.11 Test Schematics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Fully-Differential Amplifier
      2. 9.3.2 Operations for Single-Ended to Differential Signals
        1. 9.3.2.1 AC-Coupled Signal Path Considerations for Single-Ended Input to Differential Output Conversion
        2. 9.3.2.2 DC-Coupled Input Signal Path Considerations for SE-DE Conversions
        3. 9.3.2.3 Resistor Design Equations for Single-to-Differential Applications
        4. 9.3.2.4 Input Impedance Calculations
      3. 9.3.3 Differential-to-Differential Signals
        1. 9.3.3.1 AC-Coupled, Differential-Input to Differential-Output Design Issues
        2. 9.3.3.2 DC-Coupled, Differential-Input to Differential-Output Design Issues
      4. 9.3.4 Output Common-Mode Voltage
    4. 9.4 Device Functional Modes
      1. 9.4.1 Operation With a Split Supply
      2. 9.4.2 Operation With a Single Supply
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Stability, Noise Gain, and Signal Gain
      2. 10.1.2 Input and Output Headroom Considerations
      3. 10.1.3 Noise Analysis
      4. 10.1.4 Noise Figure
      5. 10.1.5 Thermal Considerations
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Driving Matched Loads
        2. 10.2.2.2 Driving Unmatched Loads For Lower Loss
        3. 10.2.2.3 Driving Capacitive Loads
        4. 10.2.2.4 Driving ADCs
          1. 10.2.2.4.1 SNR Considerations
          2. 10.2.2.4.2 SFDR Considerations
          3. 10.2.2.4.3 ADC Input Common-Mode Voltage Considerations—AC-Coupled Input
          4. 10.2.2.4.4 ADC Input Common-Mode Voltage Considerations—DC-Coupled Input
        5. 10.2.2.5 GSPS ADC Driver
        6. 10.2.2.6 Common-Mode Voltage Correction
        7. 10.2.2.7 Active Balun
      3. 10.2.3 Application Curves
    3. 10.3 Do's and Don'ts
      1. 10.3.1 Do:
      2. 10.3.2 Don't:
  11. 11Power Supply Recommendations
    1. 11.1 Supply Voltage
    2. 11.2 Single Supply
    3. 11.3 Split Supply
    4. 11.4 Supply Decoupling
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13器件和文档支持
    1. 13.1 器件支持
      1. 13.1.1 器件命名规则
    2. 13.2 文档支持
      1. 13.2.1 相关文档
    3. 13.3 接收文档更新通知
    4. 13.4 社区资源
    5. 13.5 商标
    6. 13.6 静电放电警告
    7. 13.7 术语表
  14. 14机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

9.3.2 Operations for Single-Ended to Differential Signals

One of the most useful features supported by the FDA device is the active balun configuration which provides an easy conversion from a single-ended input to a differential output centered on a user-controlled, common-mode level. Although the output side is relatively straightforward, the device input pins move in a common-mode sense with the input signal. This feature acts to increase the apparent input impedance to be greater than the RG value. However, this feature can cause input clipping if this common-mode signal moves beyond the input range. This input active impedance issue applies to both ac- and dc-coupled designs, and requires somewhat more complex solutions for the resistors to account for this active impedance, as described in this section.
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