SBOSAA5B April   2022  – September 2022 OPA2675

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Family Comparison Table
  6. Pin Configuration and Functions
  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
  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
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 High-Speed Active Filters
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Thermal Analysis
    2. 10.2 Input and ESD Protection
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

Device Functional Modes

OPA2675 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

OPA2675 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 OPA2675 enters high output impedance in offline mode. However, due to the presence of the feedback resistance RF as shown in Figure 8-12, the impedance seen by the load looking into the OPA2675 is (high impedance || RF), making the net impedance as seen 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 table. The voltage appearing on the Inverting Input pin is a resistor divided value of the voltage on the OUT pin as shown in Figure 8-12. Care should be taken to ensure both the absolute maximum limits mentioned for the OUT and Inverting pins are satisfied.

Figure 8-12 OPA2675 Offline Mode