SBASAT1B September   2025  – November 2025 AMC0381D

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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  Power Ratings
    6. 6.6  Insulation Specifications
    7. 6.7  Safety-Related Certifications
    8. 6.8  Safety Limiting Values
    9. 6.9  Electrical Characteristics
    10. 6.10 Switching Characteristics
    11. 6.11 Timing Diagram
    12. 6.12 Insulation Characteristics Curves
    13. 6.13 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Analog Input
      2. 7.3.2 Isolation Channel Signal Transmission
      3. 7.3.3 Analog Output
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input Filter Design
        2. 8.2.2.2 Differential to Single-Ended Output Conversion
      3. 8.2.3 Application Curve
    3. 8.3 Best Design Practices
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.2.2.2 Differential to Single-Ended Output Conversion

Many systems use ADCs with single-ended inputs that cannot connect directly to the differential output of the AMC0381D. Figure 8-3 shows a circuit for converting the differential output signal into a single-ended signal in front of the ADC. For R1 = R3 and R2 = R4, the output voltage equals (R2 / R1) × (VOUTP – VOUTN) + VREF. For C1 = C2 the bandwidth of the filter becomes 1 / (2 × π × C1 × R1). Configure the bandwidth of the filter to match the bandwidth requirement of the system. For best linearity, use capacitors with low voltage coefficients (such as NP0-type capacitors). For most applications, R1 = R2 = R3 = R4 = 3.3kΩ and C1 = C2 = 330pF yield good performance.

AMC0381D Connecting the AMC0381D Output to a Single-Ended Input ADC Figure 8-3 Connecting the AMC0381D Output to a Single-Ended Input ADC

The following reference guides provide further information on the general procedure to design the filtering and driving stages of SAR ADCs. These reference guides are available for download at www.ti.com.