ADE7754*

Features:

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).


Pinout




Specifications

AV_DD  to  AGND  . . . . . . . . . . . . . . . . . . . . .0.3V  to  +7V
DV_DD  to  DGND  . . . . . . . . . . . . . . . . . . . .   0.3V to +7V
DV_DD to AVDD  . . . . . . . . . . . . . . . . . . . . 0.3V to  +0.3V
Analog Input Voltage to AGND
I_AP,I_AN,I_BP,I_BN,I_CP,I_CN,V_AP,V_BP,V_CP,V_N  .        6V to +6V
Reference Input Voltage to AGND   0.3V to AV_DD+0.3V
Digital Input Voltage to DGND .      0.3V to DV_DD+0.3V
Digital Output Voltage to DGND     0.3V to DV_DD+0.3V
Operating Temperature Range
Industrial  . . . . . . . . . . . . . . . . . . . . . . 40°C to +85°C
Storage  Temperature  Range  . . . . . 65°C to +150°C
Junction  Temperature  . . . . . . . . . . . . . . . . . . .+150°C


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.