This reference design implements Class 0.1 three-phase energy measurement using a high-performance, multichannel analog-to-digital converter (ADC), which samples current transformers (CT) at 8kHz to measure the current and voltage of each leg of the AC mains. The reference design achieves high accuracy across a wide input current range (0.01A–100A) and supports high sampling frequencies necessary for power quality features such as individual harmonic analysis. An ADC sample rate of 32kSPS can be achieved when using a TI Arm® Cortex®-M0+ host microcontroller for metrology. The necessary software functionality is implemented in MSPM0-SDK and can be compiled with Code Composer Studio™.