Microchip MCP3903 Analog Front End for Three-Phase Energy Metering

Microchip Technology introduced the MCP3903 analog front end (AFE) for three-phase energy metering. The MCP3903 AFE features six 16-/24-bit Delta-Sigma analog-to-digital converters (ADCs), signal-to-noise and distortion (SINAD) of 89 dB (typical), total harmonic distortion (THD) of -99 dB (typical), programmable gain amplifiers (PGAs), low-drift voltage reference and phase-delay compensation. The chip is available now in a 28-pin SSOP package for $3.14 each (10,000-unit quantities). The MCP3903 AFE is ideal for utility meters, power-monitoring devices and instrumentation devices.

Microchip Technology MCP3903 analog front end (AFE) for three-phase energy metering

Microchip MCP3903 AFE Features

  • 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
  • Reduces external component count
  • Increases design flexibility and lowers costs
  • Ideal for the utility and industrial markets, such as in utility meters, power-monitoring devices and instrumentation devices

More info: Microchip Technology