SBOSAA5C april   2022  – may 2023 OPA2675

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Family Comparison Table
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics: Full Bias and Offline Mode VS = ±6 V
    6. 7.6  Electrical Characteristics: 75% Bias Mode VS = ±6 V
    7. 7.7  Electrical Characteristics: 50% Bias Mode VS = ±6 V
    8. 7.8  Electrical Characteristics: DIfferential Output  VS = 12 V
    9. 7.9  Electrical Characteristics: VS = 5 V
    10. 7.10 Typical Characteristics: VS = ±6 V, Full Bias
    11. 7.11 Typical Characteristics: VS = ±6 V Differential, Full Bias
    12. 7.12 Typical Characteristics: VS = ±6 V, 75% Bias
    13. 7.13 Typical Characteristics: VS = ±6 V, 50% Bias
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Operating Suggestions
        1. 8.3.1.1 Setting Resistor Values to Optimize Bandwidth
        2. 8.3.1.2 Output Current and Voltage
        3. 8.3.1.3 Driving Capacitive Loads
        4. 8.3.1.4 Line Driver Headroom Model
        5. 8.3.1.5 Noise Performance
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 High-Speed Active Filter
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
    3. 9.3 Power Supply Recommendations
      1. 9.3.1 Thermal Analysis
      2. 9.3.2 Input and ESD Protection
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
        1. 10.1.1.1 TINA-TI™ Simulation Software (Free Download)
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.1.2 Detailed Design Procedure

The 51 Ω input matching resistor is optional in this case. The input signal is ac-coupled to the 5 V dc reference voltage developed through the resistor divider from the +10 V power supply. This first stage acts as a gain of +1 V/V voltage buffer for the signal where the 600-Ω feedback resistor is required for stability. This first stage easily drives the low input resistors required at the input of this high-frequency filter. The second stage is set for a dc gain of +1 V/V, carrying the 5-V operating point through to the output pin, and an ac gain of +4 V/V. The feedback resistor has been adjusted to optimize bandwidth for the amplifier itself. As Figure 9-1 and Figure 9-2 show, the OPA2675 in this configuration gives greater than 400 MHz small-signal bandwidth. The capacitor values were chosen as low as possible but adequate to override the parasitic input capacitance of the amplifier. The resistor values were slightly adjusted to give the desired filter frequency response while accounting for the approximate 1 ns propagation delay through each channel of the OPA2675.