Energy measurement AFEs

12 March 2014 Analogue, Mixed Signal, LSI

Microchip announced a new family of energy measurement analog front ends (AFEs) with very high accuracy. The MCP3913 and MCP3914 integrate six and eight 24-bit, delta-sigma analog-to-digital converters (ADCs), respectively, with 94,5 dB SINAD, -106,5 dB THD and 112 dB SFDR.

The MCP3914’s two additional ADCs enable the monitoring of more sensors with one chip, lowering cost and size. In addition, the programmable data rate of up to 125 KSps with low-power modes allows designers to scale down for better power consumption or to use higher data rates for advanced signal analysis, such as calculating harmonic content. These AFEs also feature a CRC-16 checksum and register-map lock, for increased robustness.

As the energy metering infrastructure is being upgraded worldwide, designers are demanding increased AFE accuracy, performance and flexibility 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, uninterruptible power supplies, smart power strips and data acquisition products in the industrial and commercial markets.

Both AFEs are offered in 40-pin µQFN packages, and the MCP3913 adds a 28-pin SSOP package option.

Microchip also announced two new tools to aid in the development of energy measurement systems for three-phase metering and multiple-load monitoring using these AFEs: the MCP3913 Evaluation Board (ADM00522) and MCP3914 Evaluation Board.

For more information contact Shane Padayachee, Avnet Kopp, +27 (0)11 319 8600, [email protected], www.avnet.co.za

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