SBASAA7A May   2021  – September 2021 AMC1411

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  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
  7. 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
  8. 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 Insulation Coordination
        2. 8.2.2.2 Input Filter Design
        3. 8.2.2.3 Differential-to-Single-Ended Output Conversion
      3. 8.2.3 Application Curve
    3. 8.3 What To Do and What Not To Do
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  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

8.2 Typical Application

Reinforced isolated amplifiers are commonly offered in SOIC packages with less than 9 mm of clearance and creepage specification. Equipment with working voltages greater than 850 V, impulse voltage requirements greater than 8000 V, systems designed for altitudes greater than 2000 m or for environments with pollution degree 2 or higher, may require clearance and creepage distances greater than 9 mm depending on the overvoltage category the system is designed for. Examples are 690-V unearthed (IT) 3-phase power network for high-reliability industrial applications or corner-earthed, 690-V, 3-phase systems commonly used for high-power AC motor drives.

The AMC1411 comes in a SOIC package with greater than 15 mm of creepage distance and is specifically designed for use in high-voltage systems that require accurate voltage monitoring and reinforced isolation between high-voltage and low-voltage parts of the system.

Figure 8-1 shows a 3-phase motor-drive application that uses the AMC1411 to monitor the 1200-V, DC-link voltage. The DC-link voltage is divided down to an approximate 2-V level across the bottom resistor (RSNS) of a high-impedance resistive divider that is sensed by the AMC1411. The output of the AMC1411 is a differential analog output voltage of the same value as the input voltage but is galvanically isolated from the high-side by a reinforced isolation barrier.

The wide creepage and clearance, high isolation voltage rating, and high common-mode transient immunity (CMTI) of the AMC1411 ensure reliable and accurate operation in harsh and high-noise environments.

Figure 8-1 Using the AMC1411 for DC Link Voltage Sensing in Frequency Inverters