SBOSAA7 September   2025 OPA598

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Current Limit
      2. 6.3.2 Overcurrent Flag
      3. 6.3.3 Overtemperature Flag
      4. 6.3.4 Enable and Disable
      5. 6.3.5 Mux-Friendly Inputs
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 High Voltage 2:1 Multiplexer With Unity Gain
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
      2. 7.2.2 Output Driver
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
        3. 7.2.2.3 Application Curve
      3. 7.2.3 Parallel Op Amps
      4. 7.2.4 Composite Amplifier
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Thermal Considerations
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 PSpice® for TI
        2. 8.1.1.2 TINA-TI™ Simulation Software (Free Download)
        3. 8.1.1.3 TI Precision Designs
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

6.3.4 Enable and Disable

The OPA598 incorporates an enable and disable feature that uses the E/D pin to disable the output stage of the amplifier, which reduces the power consumption of the op amp and switches the output to a high-impedance state.

The E/D pin is referenced to the E/D Com pin. If left floating, the E/D pin is internally pulled up to enable the device. If externally controlled, the E/D pin must be supplied with a voltage between 1.5V and 5.5V greater than the E/D Com pin voltage. Even though the OPA598 output is enabled with a floating E/D pin, a moderately fast, negative-going signal capacitively coupled to the E/D pin can overpower the internal pullup and cause device shutdown. If the enable function is not used, a conservative and recommended approach is to connect E/D through a 47pF capacitor to E/D Com. Figure 6-3 shows different ways to connect the E/D and E/D Com pins.

OPA598 E/D and E/D Com Pin Connections Figure 6-3 E/D and E/D Com Pin Connections

When the E/D pin is dropped to a voltage between 0V and 0.5V greater than the E/D Com pin voltage, the output of the OPA598 is disabled. When disabled, the output of the OPA598 is set to a high-impedance state.