ADE7754AR - Poly-phase Multi-Function Energy Metering IC with Serial Port
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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