The note describes a reference design for a three‑phase meter that uses the STPM01 metering ASSP together with a VIPer12A based SMPS. It covers the overall architecture, power‑supply topology, phase‑sensing circuits, clock management network and the communication interface with a micro‑processor.
Key sections include a detailed circuit description, power‑supply design, phase‑circuit implementation, current‑sensing and anti‑aliasing filters, clock‑management network, SPI communication details, power‑calculation algorithm, layout guidelines and experimental results that validate the design.