TIDUEW8 August   2022

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 Key System Specifications
  7. 2System Overview
    1. 2.1 Schematic Diagram
    2. 2.2 Highlighted Products
      1. 2.2.1 THS3491 Current Feedback Amplifier Specifications
    3. 2.3 System Design Theory
      1. 2.3.1 Theory of Operation
        1. 2.3.1.1 Concept of Power Supply Range Extension
      2. 2.3.2 Stability Considerations
        1. 2.3.2.1 Inclusion of Series Isolation Resistance (RS)
      3. 2.3.3 Power Dissipation
        1. 2.3.3.1 DC Internal Power Dissipation of Driver Amplifier for a Purely Resistive Output Load
        2. 2.3.3.2 AC Average Internal Power Dissipation of Driver Amplifier for a Purely Resistive Output Load
        3. 2.3.3.3 Internal Average Power Dissipation of Driver Amplifier for RC Output Load
      4. 2.3.4 Thermal Performance
        1. 2.3.4.1 Linear Safe Operating Area (SOA)
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware
    2. 3.2 Test Setup
    3. 3.3 Test Results
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  10. 5Related Documentation
    1. 5.1 Trademarks

2.2.1 THS3491 Current Feedback Amplifier Specifications

  • Bandwidth:
    • 900 MHz (VO = 2 VPP, AV = 5 V/V)
    • 320 MHz (VO = 10 VPP, AV = 5 V/V)
  • Slew rate: 8000 V/µs (VO = 20 VPP)
  • Input voltage noise: 1.7 nV/√Hz
  • Bipolar supply range: ±7 V to ±16 V
  • Single supply range: 14 V to 32 V
  • Output swing: 28 VPP (±16-V supplies, 100-Ω load)
  • Linear output current: ±420 mA (Typical)
  • 16.8-mA Trimmed supply current (low temperature coefficient)
  • HD2, HD3: Less than –75 dBc (50 MHz, VO = 10 VPP, 100-Ωload)
  • Rise and fall time: 1.3 ns (10-V Step)
  • Overshoot: 1.5% (10-V step, AV = 5 V/V)
  • Current limit and thermal shutdown protection
  • Power-down feature