SBOS919C August   2019  – August 2020 OPA862

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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: VS = ±2.5 V to ±5 V
    6. 6.6 Typical Characteristics: VS = ±5 V
    7. 6.7 Typical Characteristics: VS = ±2.5 V
    8. 6.8 Typical Characteristics: VS = 1.9 V, –1.4 V
    9. 6.9 Typical Characteristics: VS = 1.9 V, –1.4 V to ±5 V
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Input and ESD Protection
      2. 7.3.2 Anti-Phase Reversal Protection
      3. 7.3.3 Precision and Low Noise
    4. 7.4 Device Functional Modes
      1. 7.4.1 Split-Supply Operation (±1.5 V to ±6.3 V)
      2. 7.4.2 Single-Supply Operation (3 V to 12.6 V)
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Single-Ended-to-Differential Gain of 4 V/V
    2. 8.2 Typical Applications
      1. 8.2.1 Single-Ended to Differential with 2.5-V Output Common-Mode Voltage
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Transimpedance Amplifier Configuration
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
      3. 8.2.3 DC Level-Shifting
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.1.1 Single-Ended-to-Differential Gain of 4 V/V

Figure 8-1 shows the configuration that can be used for a single-ended-to-differential gain of 4 V/V. Amplifier A1 follows all the conventional equations of a regular voltage-feedback amplifier for inverting and noninverting gains. With the fixed inverting gain of –1 V/V for the configuration of A2, the primary role of A2 is to invert the output of A1 so that a differential signal is available at the output pins, VOUT+ and VOUT–. In the configuration shown in Figure 8-1, VOUT+ is always in phase with VIN and equal to VIN times two. VOUT– has the same swing as VOUT+ but 180° out of phase. The common-mode voltage at A1 is equal to VIN and the common-mode voltage at A2 is equal to the voltage on the VREF pin, which in the case of Figure 8-1 is GND.

GUID-1558F02D-E048-40D9-9030-B0EE3C2E02D3-low.gifFigure 8-1 Single-Ended To Differential Gain of 4 V/V Configuration

Equation 1 through Equation 4 can be derived from the configuration in Figure 8-1. The output common-mode voltage, VOCM, is the average of VOUT+ and VOUT–, and is equal to the voltage on the VREF pin as given by Equation 4.

Equation 1. GUID-9175BD23-8734-49F7-9BD0-DB65107ECF1C-low.gif
Equation 2. GUID-6EE0DBFE-EC6E-462C-8402-ED253DCAADEA-low.gif
Equation 3. GUID-FA2BFC88-EC1E-411E-92B6-8CBF1762F0B0-low.gif
Equation 4. GUID-BDA8F998-FA16-4666-BAC3-55C2A54A8190-low.gif