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AFE designed for 3-phase energy metering

Posted: 02 Aug 2011     Print Version  Bookmark and Share

Keywords:three-phase energy  metering  six-channel 

Microchip Technology Inc. unveils the MCP3903 AFE, claimed to be the first high-accuracy, stand-alone six-channel analogue front end (AFE) designed for three-phase energy metering.

 MCP3903 AFE

The MCP3903 AFE claims to offer industry-leading accuracy, with a signal-to-noise and distortion (SINAD) of 89dB (typical) and total harmonic distortion (THD) of -99dB (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 aims to increase design flexibility and lowers costs. The MCP3903 AFE is said to be ideal for the utility and industrial markets, such as in utility meters, power-monitoring devices and instrumentation devices.

According to the company, the MCP3903's six 16-/24bit 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 is available in a 28-pin SSOP package in 10,000-unit quantities. Samples and volume-production quantities are available today.

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