SBOS258E November   2002  – April 2025 OPA698

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Related Products
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics VS = ±5V
    6. 6.6 Electrical Characteristics VS = 5V
    7. 6.7 Typical Characteristics: VS = ±5V
    8. 6.8 Typical Characteristics: VS = 5V
  8. 7 Detailed Description
    1. 7.1 Overview
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1  Output Limiters
      2. 8.1.2  Output Drive
      3. 8.1.3  Thermal Considerations
      4. 8.1.4  Capacitive Loads
      5. 8.1.5  Frequency Response Compensation
      6. 8.1.6  Pulse Settling Time
      7. 8.1.7  Distortion
      8. 8.1.8  Noise Performance
      9. 8.1.9  DC Accuracy and Offset Control
      10. 8.1.10 Input and ESD Protection
    2. 8.2 Typical Applications
      1. 8.2.1  Wideband Voltage-Limiting Operation
      2. 8.2.2  Single-Supply, Noninverting Amplifier
      3. 8.2.3  Wideband Inverting Operation
      4. 8.2.4  Limited Output, ADC Input Driver
        1. 8.2.4.1 Limited-Output, Differential ADC Input Driver
        2. 8.2.4.2 Precision Half-Wave Rectifier
      5. 8.2.5  High-Speed Full-Wave Rectifier
        1. 8.2.5.1 High-Speed Full-Wave Rectifier #1
        2. 8.2.5.2 High-Speed Full-Wave Rectifier #2
      6. 8.2.6  Soft-Clipping (Compression) Circuit
      7. 8.2.7  Very High-Speed Schmitt Trigger
      8. 8.2.8  Unity-Gain Buffer
      9. 8.2.9  DC Restorer
      10. 8.2.10 Video Sync Stripper
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Demonstration Fixture
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.2.5.2 High-Speed Full-Wave Rectifier #2

The circuit shown in Figure 8-18 combines a half-wave rectifier driving the OPA693 in an inverting configuration, while the input signal drives the noninverting input of the fixed gain amplifier OPA693, resulting in a full wave rectifier function. Figure 8-19 shows the results.

OPA698 High-Speed Full-Wave Rectifier #2Figure 8-18 High-Speed Full-Wave Rectifier #2
OPA698 Rectified 10MHz Sine WaveFigure 8-19 Rectified 10MHz Sine Wave

If the negative excursion of the rectified signal is not desired, can easily be removed by replacing the OPA693 with the OPA698 configured as a difference amplifier with VL connected to ground and VH left floating.