ADE7756 Datasheet PDF - Analog Devices

GENERAL DESCRIPTION
The ADE7756 is a high-accuracy electrical power measurement IC with a serial interface and a pulse output. The ADE7756 incorporates two second-order sigma-delta ADCs, reference circuitry, temperature sensor, and all the signal processing required to perform active power and energy measurement.
The ADE7756 contains a sampled Waveform register and an Active Energy register capable of holding at least five seconds of accumulated power at full load. Data is read from the ADE7756 via the serial interface. The ADE7756 also provides a pulse output (CF) with a frequency that is proportional to the active power.

FEATURES
High Accuracy, Supports IEC 687/1036
Less than 0.1% Error over a Dynamic Range of 1000 to 1
An On-Chip User Programmable Threshold for Line Voltage SAG Detection and PSU Supervisory
The ADE7756 Supplies Sampled Waveform Data (20 Bits) and Active Energy (40 Bits)
Digital Power, Phase and Input Offset Calibration
An On-Chip Temperature Sensor (3C Typical after Calibration)
An SPI-Compatible Serial Interface
A Pulse Output with Programmable Frequency
An Interrupt Request Pin (IRQ) and Status Register
Provide Early Warning of Register Overflow and Other Conditions
Proprietary ADCs and DSP Provide High Accuracy over Large Variations in Environmental Conditions and Time
Reference 2.4 V  8% (20 ppm/C Typical) with External Overdrive Capability
Single 5 V Supply, Low Power (25 mW Typical)