The MCP39F511 is a highly integrated, single-phase power-monitoring IC designed for real-time measurement of input power for AC/DC power supplies, providing power and energy values. It includes dual-channel delta sigma ADCs, a 16-bit calculation engine, EEPROM and a flexible 2-wire interface. An integrated low-drift voltage reference in addition to the 94.5 dB of SINAD performance on each measurement channel allows for better than 0.1% accurate designs across a 4000:1 dynamic range.

Power Monitoring Accuracy capable of 0.1% error across 4000:1 dynamic range
Built-In Calculations:
Active, Reactive, Apparent Power
Active and Reactive Energy Accumulation
True RMS Current, RMS Voltage
Line Frequency, Power Factor
Dedicated Zero Crossing Detection (ZCD) Pin
Dedicated PWM Output Pin
Automatic Event Pin Control through Fast Voltage Surge Detection