Microchip AFE for three-phase energy metering offers high accuracy

Microchip Technology Inc. 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 delivers 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, 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 intended for the utility and industrial markets, such as in utility meters, power-monitoring devices and instrumentation devices.

Key highlights:

• Six simultaneously sampled 16/24-bit resolution delta-sigma A/D converters
• 91 dB SINAD, -100 dBc THD, 102 dB SFDR
• Programmable data rate up to 64 ksps
• Internal voltage reference with low drift of 5 ppm/°C
• Internal PGAs on each channel with gain of 32 V/V
• Phase delay compensation between channels with 1 µs resolution
• Extended Temperature Range: -40°C to +125°C
• 28-pin SSOP package

Pricing: $3.14 each, in 10,000-unit quantities.

Availability: 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.

Datasheet: Click here.