TIDUC09 June   2026 BUF802

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 System Design Theory
      1. 2.3.1 Analog Front-End
        1. 2.3.1.1 Input Buffer Amplifier
        2. 2.3.1.2 Variable Gain Amplifier
        3. 2.3.1.3 ADC Driver with LMH6552
        4. 2.3.1.4 Analog PI Filter
        5. 2.3.1.5 Digital Potentiometer
      2. 2.3.2 System Dynamic Range
    4. 2.4 Highlighted Products
      1. 2.4.1 BUF802
      2. 2.4.2 LMH6518
      3. 2.4.3 DAC80508
      4. 2.4.4 TLV3605
      5. 2.4.5 TPL0102
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
      1. 3.2.1 ADC Configuration
      2. 3.2.2 AFE Hardware Setup & Configuration
        1. 3.2.2.1 Device Programming
    3. 3.3 Test Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools and Software
    3. 4.3 Support Resources
    4. 4.4 Trademarks
  11. 5About the Author

Description

High Bandwidth data acquisition systems, like a digital storage oscilloscope (DSO), require the analog front-end (AFE) signal chain to have wide (-3dB) bandwidth to measure a wide range of signals, optional high input impedance to prevent loading of the measured signal, low noise to prevent degradation of signal to noise ration (SNR), and good distortion performance to maintain signal fidelity. Typical implementations of an AFE typically requires either a complex discrete design or the development of a custom front-end ASIC. This reference design provides a simpler cost-effective AFE without sacrificing performance.