SLVUDF6 September   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 System Description
      1. 1.3.1 Key System Specifications
      2. 1.3.2 End Equipment
      3. 1.3.3 Electricity Meter
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 System Overview
      1. 2.1.1 Block Diagram
      2. 2.1.2 Design Considerations
        1. 2.1.2.1 Voltage Measurement - Analog Front End
        2. 2.1.2.2 Current Measurement - Analog Front End
        3. 2.1.2.3 Input Voltage
  9. 3Software
    1. 3.1 Metrology Overview
      1. 3.1.1 Metrology Formulas
      2. 3.1.2 UART for PC GUI Communication
      3. 3.1.3 Direct Memory Access (DMA)
      4. 3.1.4 ADC Setup
      5. 3.1.5 Foreground Process
      6. 3.1.6 Background Process
      7. 3.1.7 Software Function per_sample_dsp ()
      8. 3.1.8 Frequency Measurement and Cycle Tracking
      9. 3.1.9 LED Pulse Generation
  10. 4Implementation Results
    1. 4.1 Evaluation Procedure
      1. 4.1.1 Equipment Setup
      2. 4.1.2 Test Procedure
        1. 4.1.2.1 Working with the Metrology GUI
        2. 4.1.2.2 Calibration
          1. 4.1.2.2.1 Voltage and Current Offset Calibration
          2. 4.1.2.2.2 Voltage and Current Gain Calibration
          3. 4.1.2.2.3 Active Power Gain Calibration
          4. 4.1.2.2.4 Offset Calibration
          5. 4.1.2.2.5 Phase Calibration
    2. 4.2 Performance Data and Results
      1. 4.2.1 Electricity Meter Metrology Accuracy Results
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1. 6.1 Trademarks
  13. 7Compliance Information
    1. 7.1 Compliance and Certifications
  14. 8Related Documentation

1.3.3 Electricity Meter

Different end equipments have different requirements for electricity meters; for example, multiphase or single-phase, accuracy, and isolated or non-isolated. This reference design is developed for an isolated single-phase design using isolated ADC AMC130M02, and integrates power and data isolation, with the following advantages:

  • Meets the most stringent of accuracy requirements
  • Meets minimum sample rate requirements (without compromising on accuracy) that is sometimes not obtainable with application-specific products or metrology systems on a chip (SoC)
  • Enables flexibility in selecting the host MCU, based on the application requirements, such as the following:
    • Processing capability in million instructions per second (MIPS)
    • Minimum random access memory (RAM) and flash area
    • Number of communications modules:
      • Serial peripheral interface (SPI)
      • Universal asynchronous receiver - transmitter (UART)
      • Inter-integrated circuit (I2C)
      • Real-time clock (RTC)
      • Continuously transposed conductors (CRC) module

AMC-ADC-1PH-EVM is a high-accuracy one-phase SHUNT electricity meter design, using two channels for standalone isolated AMC130M02 ADC and cost-effective MSPM0C1105 MCU. One channel is for SHUNT resistor current sensing and another channel is for voltage sensing.

The AMC-ADC-1PH-EVM firmware specifically supports calculation of various metrology parameters for single-phase with Neural line energy measurement. These parameters can be viewed from the calibration GUI or through the ACT and REACT pulsed outputs, connected to a reference metrology test system.

  • Phase active (kWh), reactive (kvarh), and apparent energy (kVAh) with pulse-generation outputs
  • Phase active (kW), reactive (kvar), and apparent power (kVA)
  • Phase voltage and current root mean square (RMS)
  • Power factor
  • Line frequency