ADE7758ARWZRL【PDF 1/72 页】IC ENERGY METERING 3PHASE 24SOIC

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Poly Phase Multifunction Energy Metering

IC with Per Phase Information

Data Sheet

FEATURES

Highly accurate; supports IEC 60687, IEC 61036, IEC 61268,

IEC 62053-21, IEC 62053-22, and IEC 62053-23

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

3-phase services

Less than 0.1% active energy error over a dynamic range of

1000 to 1 at 25°C

Supplies active/reactive/apparent energy, voltage rms,

current rms, and sampled waveform data

Two pulse outputs, one for active power and the other

selectable between reactive and apparent power with

programmable frequency

Digital power, phase, and rms offset calibration

On-chip, user-programmable thresholds for line voltage SAG

and overvoltage detections

An on-chip, digital integrator enables direct interface-to-

current sensors with di/dt output

A PGA in the current channel allows direct interface to

current transformers

An SPI?-compatible serial interface with IRQ

ADE7758

Proprietary ADCs and DSP provide high accuracy over large

variations in environmental conditions and time

Reference 2.4 V (drift 30 ppm/°C typical) with external

overdrive capability

Single 5 V supply, low power (70 mW typical)

GENERAL DESCRIPTION

The ADE7758 is a high accuracy, 3-phase electrical energy

measurement IC with a serial interface and two pulse outputs.

The ADE7758 incorporates second-order Σ-Δ ADCs, a digital

integrator, reference circuitry, a temperature sensor, and all the

signal processing required to perform active, reactive, and

apparent energy measurement and rms calculations.

The ADE7758 is suitable to measure active, reactive, and

apparent energy in various 3-phase configurations, such as

WYE or DELTA services, with both three and four wires. The

ADE7758 provides system calibration features for each phase,

that is, rms offset correction, phase calibration, and power

calibration. The APCF logic output gives active power

information, and the VARCF logic output provides instantaneous

reactive or apparent power information .

FUNCTIONAL BLOCK DIAGRAM

AVDD

REF IN/OUT

AGND

POWER

SUPPLY

MONITOR

AVRMSGAIN[11:0]

| X|

AVRMSOS[11:0]

AVAG[11:0]

ADE7758

IAP

IAN

2.4V

REF

PGA1

–

4 k ?

ADC

HPF

INTEGRATOR

X 2

90° PHASE

SHIFTING FILTER

AIRMSOS[11:0]

LPF2

LPF

REACTIVE OR

APPARENT POWER

VARCFNUM[ 11:0]

DFC ÷

VARCF

PGA2

AVAROS[11:0]

AVARG[11:0]

VARCFDEN[ 11:0]

VAP

PGA1

–

ADC

APHCAL[6:0]

LPF2

AWATTOS[11:0]

AWG[11:0]

PHASE B

AND

PHASE C

DATA

IBP

IBN

VBP

ICP

ICN

VCP

–

PGA1

–

PGA2

–

PGA2

–

ADC

ACTIVE/REACTIVE/AP PARENT ENERGIES

AND VOLTAGE/CURRENT RMS CALCUL ATION

FOR PHASE B

(SEE PHASE A FOR DETAILED SIGNAL PATH)

ACTIVE/REACTIVE/AP PARENT ENERGIES

AND VOLTAGE/CURRENT RMS CALCUL ATION

FOR PHASE C

(SEE PHASE A FOR DETAILED SIGNAL PATH)

VADIV[7:0]

VARDIV[7:0]

WDIV[7:0]

ADE7758 REGISTERS AND

SERIAL INTERFACE

ACTIVE POWER

APCFNUM[11:0]

DFC ÷

APCFDEN[ 11:0]

APCF

DVDD

DGND

CLKIN

CLKOUT

DIN

DOUT

SCLK

IRQ

Figure 1.

Rev. E

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700 www.analog.com

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