SBASAS7 August   2024 AMC0106M05

ADVANCE INFORMATION  

  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 (DEN Package)
    5. 5.5 Package Characteristics
    6. 5.6 Electrical Characteristics
    7. 5.7 Switching Characteristics
    8. 5.8 Timing Diagrams
  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 Modulator
      3. 6.3.3 Isolation Channel Signal Transmission
      4. 6.3.4 Digital Output
        1. 6.3.4.1 Output Behavior in Case of a Full-Scale Input
        2. 6.3.4.2 Output Behavior in Case of a Missing High-Side Supply
    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 Shunt Resistor Sizing
        2. 7.2.2.2 Input Filter Design
        3. 7.2.2.3 Bitstream Filtering
        4. 7.2.2.4 Designing the Bootstrap Supply
    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
    1. 10.1 Mechanical Data

Package Options

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

6.1 Overview

The AMC0106M05 is a single-channel, second-order, CMOS, delta-sigma (ΔΣ) modulator designed for high-resolution analog-to-digital conversions of AC signals. The differential analog input of the AMC0106M05 is implemented with a switched-capacitor circuit. The isolated output of the converter (DOUT) provides a stream of digital ones and zeros synchronous to the external clock applied to the CLKIN pin. The time average of this serial output is proportional to the analog input voltage.

The modulator shifts the quantization noise to high frequencies. Therefore, use a digital low-pass digital filter, such as a sinc filter at the device output to increase overall performance. This filter also converts from the 1-bit data stream at a high sampling rate into a higher-bit data word at a lower rate (decimation). Use a microcontroller (μC) or field-programmable gate array (FPGA) to implement the filter.

The overall performance (speed and resolution) depends on the selection of an appropriate oversampling ratio (OSR) and filter type. A higher OSR results in higher resolution while operating at a lower refresh rate. A lower OSR results in lower resolution, but provides data at a higher refresh rate. Multiple filters can run in parallel. For example, a low OSR filter for fast overcurrent detection and a high OSR filter for high resolution current measurement.

The silicon-dioxide (SiO2) based capacitive isolation barrier supports a high level of magnetic field immunity; see the ISO72x Digital Isolator Magnetic-Field Immunity application note. The AMC0106M05 uses an on-off keying (OOK) modulation scheme to transmit data across the isolation barrier. This modulation, and the isolation barrier characteristics, result in high reliability in noisy environments and high common-mode transient immunity.