The MCP3905L is an energy measurement IC supporting the IEC 62053 international energy metering specification. The output of the device includes a frequency proportional to the average active (real) power at the inputs as well as a higher frequency output proportional to the instantaneous power for meter calibration. The MCP3905L incorporates two 16-bit delta-sigma ADCs with a progammable gain up to 16, which enable small shunt meter designs for measuring a wide range of Ib and Imax currents. The integrated on-chip voltage reference has ultra-low temperature drift of 15 ppm per degree C. Also on-chip is a fixed-function DSP for active (real) power calculation. The MCP3905L offers reduced pulse width of calibration output frequency and mechanical counter drive for low power meter designs.

   Supplies active (real) power measurement for single-phase, residential energy metering

   Supports IEC 62053 International EnergyMetering Specification and legacy IEC1036/61036/687 Specifications

   16-bit, Delta-Sigma Analog-to-Digital Converters (ADCs)

   Reduced pulse-width of calibration outputfrequency and mechanical counter drive for lowpower meter designs (MCP3905L)

   Increased output frequency constant options formeter design (MCP3905L)

   0.1% typical measurement error over 500:1dynamic range (MCP3905A / MCP3905L)

   Programmable Gain Amplifier (PGA) for smallsignal inputs supports low value shunt currentsensor

   Ultra-low drift on-chip reference: 15 ppm/°C (typical)

   Direct drive for electromagnetic mechanicalcounter and two-phase stepper motors