MCP3909 Energy-Measurement IC - Microchip

Microchip announced the MCP3909 energy-measurement IC, highly accurate chip with an SPI interface and active power-pulse output. To make the development faster and easier, Microchip also released the Reference Design Kit for this IC:  MCP3909 3-Phase Energy Meter Reference Design.

The MCP3909 IC has two 16-bit delta-sigma ADC that can be accessed through SPI interface, and also simultaneously providing a pulse output with a frequency proportional to the active-power calculation. Microchip claim,  the MCP3909 has very low (0.1% typically) of  measurement error over a 1000:1 dynamic range. Its extremely low supply current of only 4 mA makes it suitable for many single- and three-phase energy meter designs.

The price of MCP3909 3-Phase Energy Meter Reference Design Kit is $175. The Kit includes three MCP3909 ICs, plus a PIC18F2520 and a PIC18F4550 microcontroller. The PIC18F2520 performs all power calculations in the reference design, while the PIC18F4550 provides a USB interface to PC. The included software has the ability to read active and apparent power, RMS current and RMS voltage.

The samples of MCP3909 energy-measurement IC is available in a 24-pin SSOP package. The sample is    available today. For mass qtt, the price is $1.51 each in 10K-unit.

Source: Microchip