1 System Description

TIDA-010244 is a Class 0.2S, high-accuracy, 3-phase shunt electricity meter reference design, using four 4-channel standalone isolated AMC131M03 ADCs and a cost-effective MSPM0G3507 microcontroller (MCU). The reference design can also be used for energy metering in popular products such as EV chargers and AC wallboxes. Each of the three isolated ADCs (one per phase) senses the Mains voltage and current on the respective Phase A, B, or C, while the non-isolated ADC is used for current monitoring of the Neutral line over a shunt.

The TIDA-010244 firmware specifically supports calculation of various metrology parameters for 3-phase energy measurement and a Neutral line. These parameters can be viewed from the calibration GUI or through the ACT and REACT pulsed outputs, connected to a reference test system:

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