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