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New Energy Measurement Analog Front Ends for Single-Phase Smart Meters


Microchip Releases New MCP3912 and MCP3919 Analog Front Ends with 24-bit A/D Accuracy


Click for Larger Image - New Microchip MCP3919 Energy-Measurement Analog Front End

Microchip today announced the completion of its high-accuracy, 1-8 channel, single and poly-phase MCP391X energy-measurement Analog Front End (AFE) family. The new MCP3919 and MCP3912 members integrate three and four channels of 24-bit, delta-sigma Analog-to-Digital Conversion (ADC), respectively, with industry-leading accuracy of 93.5 dB SINAD, -107 dB THD and 112 dB SFDR for precise signal acquisition and higher-performing end products. These are the optimal numbers of channels for single-phase energy meters with neutral monitoring (3-channel); or single-phase, three-wire energy meters (4-channel). The high level of integration on the new AFEs also includes a low-drift voltage reference, programmable gain amplifiers, phase-delay compensation and cyclic redundancy check (CRC).

As the energy-metering infrastructure is being upgraded worldwide, designers are demanding increased AFE accuracy and integration to develop the latest generation of smart meters. These features are also required by the designers of advanced power-monitoring systems for applications such as server power supplies and power distribution units, electronic circuit breakers, smart power strips and other data-acquisition products in the industrial, commercial and consumer markets. Microchip's newest AFEs improve application performance with their industry-leading accuracy, high integration and optimal number of channels for single-phase energy measurement. Additionally, the high AFE accuracy facilitates energy-meter calibration, which reduces production costs.

Click for Larger Image - New Microchip MCP3919 Block Diagram “These new energy-measurement AFEs complete our high-accuracy family,” said Bryan J. Liddiard, marketing vice president of Microchips Analog and Interface Products Division. ' “Now designers have a single source for any single-phase or poly-phase application.”


The company's Web site address is www.Microchip.com
[Reprinted with kind permission from Microchip - Release Date, 4th November, 2014]


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