SLOS217I July   1998  – December 2024 THS3001

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Recommended Feedback and Gain Resistor Values
      2. 7.1.2 Noise Calculations
      3. 7.1.3 Slew Rate
      4. 7.1.4 Offset Voltage
    2. 7.2 Typical Applications
      1. 7.2.1 General Configurations
      2. 7.2.2 Driving a Capacitive Load
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 PCB Design Considerations
        2. 7.4.1.2 Thermal Considerations
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Evaluation Board
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

7.2.2 Driving a Capacitive Load

Driving capacitive loads with high-performance amplifiers is not a problem as long as certain precautions are taken. The first is to realize that the THS3001 has been internally compensated to maximize the bandwidth and slew-rate performance. When the amplifier is compensated in this manner, capacitive loading directly on the output decreases the device phase margin leading to high-frequency ringing or oscillations. Therefore, for capacitive loads of greater than 10pF, a resistor needs to be placed in series with the output of the amplifier, as shown in Figure 7-10. A minimum value of 20Ω can work adequately for most applications. For example, in 75Ω transmission systems, setting the series resistor value to 75Ω both isolates any capacitance loading and provides the proper line impedance matching at the source end.

THS3001 Driving a Capacitive Load Figure 7-10 Driving a Capacitive Load