SBOS382H may   2008  – june 2023 OPA2673

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  Typical Characteristics: VS = ±6 V, Full Bias
    9. 7.9  Typical Characteristics: VS = ±6 V Differential, Full Bias
    10. 7.10 Typical Characteristics: VS = ±6 V, 75% Bias
    11. 7.11 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 Applications
      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
      2. 9.2.2 PLC Line Driver
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 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

8.4 Device Functional Modes

OPA2673 has four different functional modes set by the A0 and A1 pins. Table 8-2 shows the truth table for the device mode pin configuration and the associated description of each mode.

Table 8-2 A0 and A1 Logic Table
A0 A1 FUNCTION DESCRIPTION
0 0 Full-bias mode (100%) Both amplifiers are on with the lowest distortion possible
1 0 Mid-bias mode (75%) Both amplifiers are on with power savings and a reduction in distortion performance
0 1 Low-bias mode (50%) Both amplifiers are on with enhanced power savings and a reduction of overall performance
1 1 Offline mode Both amplifiers are off and the output is high impedance

OPA2673 can be switched between the full-bias and offline mode using just one control bit by tying the A0 and A1 together. If switching between the mid-bias or low-bias modes and the offline mode is required for the application, then either the A0 or A1 pin can be connected to ground and the control pin can be connected to the non-grounded BIAS pin.

The OUT pin of OPA2673 enters high output impedance in offline mode. However, because of the presence of feedback resistor RF (shown in Figure 8-12), the impedance detected by the load going into the OPA2673 is high impedance || RF, making the net impedance as detected from the load equal to RF. The maximum voltage allowed to be incident on the OUT pin and the Inverting Input pin during offline mode is mentioned in the Absolute Maximum Ratings. Figure 8-12 shows the voltage appearing on the Inverting Input pin is a resistor divided value of the voltage on the OUT pin. Make sure that both the absolute maximum limits mentioned for the OUT and Inverting pins are satisfied.

GUID-20211029-SS0I-JQJL-6FPM-4STLFSG5LK7D-low.svg Figure 8-12 OPA2673 Offline Mode