SBASB99 November   2025 AMC1200C

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 (DWV Package)
    5. 5.5  Thermal Information (DUB Package)
    6. 5.6  Power Ratings
    7. 5.7  Insulation Specifications
    8. 5.8  Safety-Related Certifications
    9. 5.9  Safety Limiting Values (DWV Package)
    10. 5.10 Safety Limiting Values (DUB Package)
    11. 5.11 Electrical Characteristics
    12. 5.12 Switching Characteristics
    13. 5.13 Timing Diagram
    14. 5.14 Insulation Characteristics Curves
    15. 5.15 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 Analog Input
      2. 6.3.2 Isolation Channel Signal Transmission
      3. 6.3.3 Analog Output
    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 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Input Filter Design
        2. 7.2.2.2 Differential-to-Single-Ended Output Conversion
      3. 7.2.3 Application Curve
    3. 7.3 Best Design Practices
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.3.2 Isolation Channel Signal Transmission

As shown in Figure 6-1, the AMC1200C uses an on-off keying (OOK) modulation scheme to transmit the modulator output bitstream across the SiO2-based isolation barrier. The transmit driver (TX) is illustrated in the Functional Block Diagram. TX transmits an internally generated, high-frequency carrier across the isolation barrier to represent a digital one. However, TX does not send a signal to represent a digital zero. The nominal frequency of the carrier used inside the AMC1200C is 480MHz.

The receiver (RX) on the other side of the isolation barrier recovers and demodulates the signal and provides the input to the analog filter. The AMC1200C transmission channel is optimized to achieve the highest level of common-mode transient immunity (CMTI) and the lowest level of radiated emissions. The high-frequency carrier and RX/TX buffer switching cause these emissions.

AMC1200C OOK-Based Modulation Scheme Figure 6-1 OOK-Based Modulation Scheme