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Microchip Releases New Three-Phase Energy Metering Solution


The New MCP3903 provides Six 24-bit Highly Accurate A/D Converters together with a SPI Interface


Microchip have just released a new stand-alone six-channel analog front end (AFE) for three-phase energy metering. The MCP3903 AFE includes six 16-/24-bit Delta-Sigma analog-to-digital converters (ADCs) and offers industry-leading accuracy, with a signal-to-noise and distortion (SINAD) of 91 dB (typical) and total harmonic distortion (THD) of -100 dB (typical). Additional integrated features include programmable gain amplifiers (PGAs), a low-drift voltage reference and phase-delay compensation, for a reduced external component count that increases design flexibility and lowers costs. The MCP3903 AFE is ideal for the utility and industrial markets, such as in utility meters, power-monitoring devices and instrumentation devices.

Click for Larger Image - Microchip MCP3903 Government regulations and trends in smart metering, along with the Advanced Metering Infrastructure, have dramatically increased the need for products that offer precise measurements in multi-phase metering, while simplifying designs and reducing costs. The MCP3903 delivers this functionality by providing a highly accurate solution with integrated features that enable design flexibility. The MCP3903's six 16-/24-bit Delta-Sigma ADCs enable the simultaneous sampling of six inputs, making it ideal for three-phase power monitoring and metering, while its industry-leading accuracy allows for higher-accuracy products.

“The MCP3903 AFE provides engineers with a highly accurate solution for the growing smart-metering and power-monitoring market,” said Bryan J. Liddiard, vice president of marketing with Microchip's Analog and Interface Products Division. “This device's integrated features enable more precise measurements than competitive solutions, with reduced design time and lower cost.”



The company's Web site address is www.microchip.com
[Reprinted with kind permission from Microchip Corporation]