SLVUE37 October   2026

 

  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. 1.3.4 Power Quality Meter, Power Quality Analyzer
    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
        4. 2.1.2.4 XDS110 Emulator
        5. 2.1.2.5 Magnetic Tamper Detection With TMAG5273 Linear 3D Hall-Effect Sensor (Not Populated on EVM)
  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
        1. 4.1.1.1 Jumper Settings for LED and UART
        2. 4.1.1.2 Power Supply Options and Jumper Settings
      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
      2. 4.2.2 Radiated Emissions Performance
        1. 4.2.2.1 EMI Mitigation Recommendations
  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. 7Tools and Software
  14. 8Related Documentation

1.3.3 Electricity Meter

Utility providers and customers require more features from electricity meters. As the accuracy requirements and amount of processing expected from electricity meters rapidly increases, solving these issues with a single metrology system-on-chip (SoC) becomes increasingly more difficult.

A common answer is to utilize a standalone ADC with a host microcontroller (MCU) to simultaneously overcome the processing and accuracy limitations of electricity meter SoCs. With this dual-chip approach, system designers can mix and match the most appropriate devices for ADC and for MCU, and optimize the system for cost or performance. Using an accurate state-of-the-art standalone ADC with integrated power and data isolation, such as the AMC131M03, has the following advantages:

  • Enables meeting the most stringent of accuracy requirements
  • Enables meeting minimum sample rate requirements (without compromising on accuracy) that is sometimes not obtainable with application-specific products or metrology SoCs
  • Enables flexibility in selecting the host MCU, as the device only has to meet the application requirements. These requirements include the following:
    • Processing capability in MIPS
    • Minimum RAM and flash area
    • The number of communications modules (for example, serial-peripheral interface (SPI), universal asynchronous receiver-transmitter (UART), and I2C), DMA and CRC modules and some other peripherals, like security features for providing meter data integrity and security

To properly measure energy consumption, voltage and current sensors translate Mains voltage and current to a voltage range that an ADC can sense. When a multiphase power distribution system is used, the current sensors must be isolated from phase-to-phase, so the sensors can properly detect the current drawn from the two or three or four different lines (when Neutral is measured) without damaging the ADCs. This design uses either 2 or 3 or 4 cost-effective shunt sensors, which are immune to magnetic tampering, and enables the implementation of electricity meters for three-phase STAR configuration with optional Neutral line measurement.