SBOS900B September   2018  – June 2019 OPA2156


  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Low Input Voltage Noise Spectral Density
      2.      OPA2156 Transimpedance Configuration
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information: OPA2156
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Phase Reversal Protection
      2. 7.3.2 Electrical Overstress
      3. 7.3.3 Thermal Considerations
      4. 7.3.4 Thermal Shutdown
      5. 7.3.5 Common-Mode Voltage Range
      6. 7.3.6 Overload Recovery
    4. 7.4 Device Functional Modes
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Slew Rate Limit for Input Protection
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Power Dissipation
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. TINA-TI (Free Software Download)
        2. TI Precision Designs
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

Power Dissipation

The OPA2156 op amp is capable of driving a variety of loads with a power-supply voltage up to ±18 V and full operating temperature range. Internal power dissipation increases when operating at high supply voltages and/or high output currents. Copper leadframe construction used in the OPA2156 improves heat dissipation compared to conventional materials. Circuit board layout can also help minimize junction temperature rise. Wide copper traces help dissipate the heat by acting as an additional heat sink. Temperature rise can be further minimized by soldering the devices to the circuit board rather than using a socket.

The OPA2156 has an internal thermal protection feature which prevents it from being damaged due to self heating, or the internal heating generated during normal operation. The protection circuitry works by monitoring the temperature of the output stage and turns of the output drive if the junction temperature of the device rises to approximately 170°C. The device has a thermal hysteresis of approximately 15°C, which allows the device to safely cool down before returning to normal operation at approximately 155°C. TI recommends that the system design takes into account the thermal dissipation of the OPA2156 to ensure that the recommended operating junction temperature of 125°C is not exceeded to avoid decreasing the lifespan of the device or permanently damaging the amplifier.