ADE7754

The ADE7754 is a high accuracy three-phase electrical energy measurement IC with a serial interface and a pulse output. The ADE7754 incorporates second order sigmadelta ADCs, reference circuitry, temperature sensor, and all the signal processing required to perform Active Energy measurement, Apparent Energy measurement and rms calculation.

The ADE7754 provides different solutions to measure Active and Apparent Energy from the six analog inputs thus enabling the use of the ADE7754 in various Power meter services as 3-phase 4-wire, 3-phase 3-wire but also 4-wire delta.

In addition to RMS calculation, Real and Apparent power informations, the ADE7754 provides system calibration features for each phase, i.e., channel offset correction, phase calibration and power calibration. The CF logic output gives instantaneous real power information.

The ADE7754 has a waveform sample register which enables access to ADC outputs. The part also incorporates a detection circuit for short duration low or high voltage variations.

The voltage threshold levels and the duration (no. of half line cycles) of the variation are user programmable.

A zero crossing detection is synchronized which the zero crossing point of the line voltage of each of the three phases.

This information is used to measure each line's Period. It is also used internally to the chip in the Line Active Energy and Line Apparent Energy accumulation modes. This permits faster and more accurate calibration of the power calculations.

This signal is also useful for synchronization of relay switching.


Data is read from the ADE7754 via the SPI serial interface.

The interrupt request output (IRQ) is an open drain, active low logic output. The IRQ output will go active low when one or more interrupt events have occurred in the ADE7754. A status register will indicate the nature of the interrupt.

The ADE7754 is available in a 24-lead SOIC package.