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)