SLOSEE6 July   2026 OPA955

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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
    6. 6.6 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input and ESD Protection
      2. 8.3.2 Feedback Pin
    4. 8.4 Device Functional Modes
      1. 8.4.1 Split-Supply and Single-Supply Operation
  10. 9 Application and Implementation
    1. 9.1 Power Supply Recommendations
    2. 9.2 Layout
      1. 9.2.1 Layout Guidelines
      2. 9.2.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

7 Parameter Measurement Information

The various test setup configurations for the OPA955 are shown in Figure 7-1, Figure 7-2, and Figure 7-3. When configuring the OPA955 in a gain of +20V/V and +40V/V, set the feedback resistor RF to 909Ω.

Figure 6-1 shows 5dB of peaking with the amplifier in an inverting configuration of –7V/V with the amplifier configured as shown in Figure 7-2. The 50Ω matched termination of this circuit configuration results in the amplifier being configured in a noise gain of 5.3V/V, which is lower than the recommended +7V/V.

OPA955 Noninverting ConfigurationFigure 7-1 Noninverting Configuration
OPA955 Inverting Configuration (Gain = –7V/V)Figure 7-2 Inverting Configuration (Gain = –7V/V)
OPA955 Capacitive Load Driver ConfigurationFigure 7-3 Capacitive Load Driver Configuration