The MCP3909-I/SS is an Energy Metering IC with SPI interface, active power pulse output and high field reliability. It is 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 up to 14kHz with 16-bit ADC output and 20-bit multiplier output words. The 16-bit, delta-sigma ADC allows for a wide range of IB and IMAX currents or small shunt (<200μOhms) meter designs. A no-load threshold block prevents any current creep measurements for the active power pulse outputs. The integrated on-chip voltage reference has an ultra-low temperature drift of 15ppm/°C.
Digital waveform data access through SPI interface
Dual functionality pins support serial interface access
Simultaneous active power pulse output
Two 16-bit second order delta-sigma analogue-to-digital converters (ADCs) with multi-bit DAC
0.1% Typical active energy measurement error over 1000:1 dynamic range
PGA for small signal input supports low value shunt current sensor
Direct drive for electromagnetic mechanical counter and two-phase stepper motors
