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

8.2.9 DC Restorer

Figure 8-25 shows a dc restore circuit using the OPA698 and OPA660. The buffer element of the OPA660 is used to buffer the input signal while the transconductance element is used to restore the dc level after the decoupling capacitor C1. The dc level is set using R1 and R2. The OPA698 is configured at a gain of 2V/V to compensate for the 75Ω series into a 75Ω load. The OPA698 also limits the output to ground.

OPA698 DC Restore to Ground Figure 8-25 DC Restore to Ground