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Microchip's First Six-Channel Analog Front End for Three-Phase Energy Metering Offers Industry-Leading Accuracy

Jul 26, 2011

MCP3903 Six Channel Delta Sigma A/D Converter

MCP3903 Six Channel Delta Sigma A/D Converter

Device Includes Six 16-/24-bit ADCs, Integrated PGAs, Low-Drift Voltage Reference, Phase-Delay Compensation and Modulator Output Block

Microchip Technology Inc., a leading provider of microcontroller, analog and Flash-IP solutions, today announced its first high-accuracy, 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 89 dB (typical) and total harmonic distortion (THD) of -99 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.

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.”

Packaging, Pricing and Availability

The MCP3903 is available in a 28-pin SSOP package for $3.14 each, in 10,000-unit quantities. Samples are available today, at http://www.microchip.com/get/SLAF. Volume-production quantities can be ordered today at http://www.microchip.com/get/3N16.


Microchip Technology Inc. (NASDAQ:  MCHP) is a leading provider of microcontroller, analog and Flash-IP solutions, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide.  Headquartered in Chandler, Arizona, Microchip offers outstanding technical support along with dependable delivery and quality.

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