High Accuracy, supports IEC 687/61036

Compatible with 3-phase/3-wire, 3-phase/4-wire

and any type of 3-phase services

Less than 0.1% error in Active Power Measurement

over a dynamic range of 1000 to 1

The ADE7754 supplies Active Energy, Apparent Energy,

Voltage rms, Current rms and Sampled Waveform Data.

Digital Power, Phase & Input Offset Calibration.

An On-Chip temperature sensor (±3°C typ. after calibration)

On-Chip user Programmable thresholds for line voltage

SAG and overdrive detections.

A SPI compatible Serial Interface with  Interrupt Request line

(IRQ).

A pulse output with programmable frequency

Proprietary ADCs and DSP provide high accuracy over large

variations in environmental conditions and time.

Reference 2.4V±8% (Drift 30 ppm/°C typical)

with external overdrive capability

Single 5V Supply, Low power (80mW typical)

GENERAL DESCRIPTION

 

The ADE7754 is a high accuracy Poly-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, Apparent

Energy measurements 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 gain 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 packag

 

 

 

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