Analog Solutions for Power Metering Applications

This diagram shows how you can use our AFE and temperature sensor for single/poly shunt phase electricity metering and temperature measurements. In the case of a shunt measurement, isolation is required to eliminate the noise going into the microcontroller (MCU). The resistive shunt measurements do not have the inherent electrical isolation of the Current Transformer (CT) measurement method, so in applications that require isolation, a digital isolator should be placed before the MCU to provide noise isolation.

This diagram shows how you can use our AFE and temperature sensor to offer single/poly CT electricity metering and temperature measurements. Traditionally, a CT provides inherent isolation, eliminating the need for digital isolation. However, the CT must be DC tolerant to avoid being saturated, which increases the overall system cost. 

Our MCP3912, MCP3913 and MCP3914 I/V metering AFE ADCs are excellent options for power monitoring, utility metering, factory automation and process control, energy measurement and medical instruments. They offer exceptional performance, high resolution and SNR and feature programmable data rates up to 125 ksps.