Description
The MCP3909 device is an energy-metering IC designed to support the IEC 62053 international metering standard specification. It supplies a frequency output proportional to the average active real power, with simultaneous serial access to ADC channels and multiplier output data. This output waveform data is available at up to 14 kHz with 16-bit ADC output and 20-bit multiplier output words. The 16-bit, delta-sigma ADCs allow for a wide range of IB and IMAX currents and/or small shunt (<200 µOhms) meter designs.

FEATUREs
• Supports IEC 62053 International Energy Metering Specification and legacy IEC 1036/ 61036/687 Specifications
• Digital waveform data access through SPI interface
    - 16-bit Dual ADC output data words
    - 20-bit Multiplier output data word
• Dual functionality pins support serial interface access and simultaneous Active Power Pulse Output
• Two 16-bit second order delta-sigma Analog-toDigital Converters (ADCs) with multi-bit DAC
    - 81 dB SINAD (typ.) both channels
• 0.1% typical active energy measurement error over 1000:1 dynamic range
• PGA for small signal inputs supports low value shunt current sensor
• Ultra-low drift on-chip reference: 15 ppm/°C (typ.)
• Direct drive for electromagnetic mechanical counter and two-phase stepper motors
• Low IDD of 4 mA (max.)
• Tamper output pin for negative power indication
• Industrial Temperature Range: -40°C to +85°C