AFE houses six ADCs for energy metering

Chandler, Ariz. — Microchip Technology Inc. has unveiled its first high-accuracy, standalone 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).

Other 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, said Microchip. The MCP3903 is suited for the utility and industrial markets, such as utility meters, power-monitoring devices and instrumentation devices.

Government regulations and trends in smart metering, along with the Advanced Metering Infrastructure (AMI), have dramatically increased the need for products that offer precise measurements in multi-phase metering, while simplifying designs and reducing costs, said Microchip. The MCP3903’s six 16-/24-bit Delta-Sigma ADCs enable the simultaneous sampling of six inputs, making it well-suited for three-phase power monitoring and metering.

Availability: Samples are available at Volume production can be ordered at
Pricing: Available in a 28-pin SSOP package, the MCP3903 is priced at $3.14 each in quantities of 10,000.