Microchip Technology Inc., a leading provider of microcontroller and analogue semiconductors, has unveiled MCP3909 energy-measurement IC and reference design.
The highly accurate IC combines low power consumption with an SPI interface and active power-pulse output, making it adaptable to a wide variety of meter designs.
Together with the MCP3909 3-phase energy meter reference design, the IC enables designers to develop and bring meter designs to market quickly.
The MCP3909 IC has a two 16-bit delta-sigma Analogue-to-Digital Converters (ADCs) onboard that can be accessed through its SPI interface while simultaneously providing a pulse output whose frequency is proportional to the active-power calculation.
This simultaneous output of data makes the IC flexible and easy to use as well as adaptable to a variety of meter requirements.
Additionally, with the IC’s low, 0.1% typical measurement error over a 1000:1 dynamic range, the MCP3909 IC easily fits into meter applications requiring high accuracy.
The IC’s low supply current of only 4 mA makes it suitable for many single and three-phase energy meter designs and helps customers remain within their power budget.
According to Microchip, with the IC’s high levels of integration and accuracy, the MCP3909 is a user-friendly energy measurement IC that can be easily applied to a variety of single and three phase metering applications.
Together with the MCP3909 3-phase energy meter reference design, users can quickly get started on metering designs using PIC microcontrollers.
The MCP3909 3-phase energy meter reference design part # MCP3909RD-3PH1 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 desktop software.
The software package that comes with the reference design enables meter calibration and the ability to read active and apparent power as well as RMS current and RMS voltage.