46.1 Description

The Energy Metering Analog Front End peripheral (EMAFE) embeds five high-resolution Delta-Sigma Analog-to-Digital converters followed by SINC decimation filters. The current measurement channels feature a low noise programmable gain amplifier to accommodate any type of current sensor configured in any type of IEC/ANSI-C application. One of these channels may be dedicated to neutral current measurement to implement anti-tamper functions.

The EMAFE also embeds a high-performance voltage reference and a die temperature sensor. The temperature characteristics of these functions are measured during manufacturing and stored in an internal read-only memory. A low-cost and efficient voltage reference temperature correction can then be implemented at software level and is implemented in the standard Microchip ANSI and IEC Metrology compliant library.

.