ade7763 Analog Devices, Inc., ade7763 Datasheet

ade7763

Manufacturer Part Number

ade7763

Description

Single-phase Active And Apparent Energy Metering Ic

Manufacturer

Analog Devices, Inc.

Datasheet

1.ADE7763.pdf (56 pages)

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FEATURES

High accuracy; supports IEC 61036/60687, IEC62053-21, and

On-chip digital integrator enables direct interface-to-current

A PGA in the current channel allows direct interface to

Active and apparent energy, sampled waveform, and current

Less than 0.1% error in active energy measurement over a

Positive-only energy accumulation mode available

On-chip user programmable threshold for line voltage surge

Digital calibration for power, phase, and input offset

On-chip temperature sensor (±3°C typical)

SPI®-compatible serial interface

Pulse output with programmable frequency

Interrupt request pin (IRQ) and status register

Reference 2.4 V with external overdrive capability

Single 5 V supply, low power (25 mW typical)

GENERAL DESCRIPTION

The ADE7763

DSP for high accuracy over large variations in environmental

conditions and time. The ADE7763 incorporates two second-

order, 16-bit -∆ ADCs, a digital integrator (on Ch1), reference

circuitry, a temperature sensor, and all the signal processing

Rev. A

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.

U.S. Patents 5,745,323; 5,760,617; 5,862,069; 5,872,469; others pending.

IEC62053-22

sensors with di/dt output

shunts and current transformers

and voltage rms

dynamic range of 1000 to 1 at 25°C

and SAG and PSU supervisory

features proprietary ADCs and fixed function

V1P

V1N

V2P

V2N

PGA

REFERENCE

AGND

SENSOR

2.4V

TEMP

AVDD

REF

ADC

IN/OUT

PHCAL[5:0]

FUNCTIONAL BLOCK DIAGRAM

RESET

HPF1

CLKIN CLKOUT

LPF1

INTEGRATOR

MULTIPLIER

VRMSOS[11:0]

IRMSOS[11:0]

Figure 1.

Single-Phase Active and Apparent

DVDD

LPF2

required to perform active and apparent energy measurements,

line-voltage period measurements, and rms calculation on the

voltage and current channels. The selectable on-chip digital

integrator provides direct interface to di/dt current sensors such

as Rogowski coils, eliminating the need for an external analog

integrator and resulting in excellent long-term stability and

precise phase matching between the current and the voltage

channels.

The ADE7763 provides a serial interface to read data and a

pulse output frequency (CF) that is proportional to the active

power. Various system calibration features such as channel

offset correction, phase calibration, and power calibration

ensure high accuracy. The part also detects short duration, low

or high voltage variations.

The positive-only accumulation mode gives the option to

accumulate energy only when positive power is detected. An

internal no-load threshold ensures that the part does not exhibit

any creep when there is no load. The zero-crossing output (ZX)

produces a pulse that is synchronized to the zero-crossing point

of the line voltage. This signal is used internally in the line cycle

active and apparent energy accumulation modes, which enables

faster calibration.

The interrupt status register indicates the nature of the interrupt,

and the interrupt enable register controls which event produces

an output on the IRQ pin, an open-drain, active low logic output.

The ADE7763 is available in a 20-lead SSOP package.

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

Tel: 781.329.4700

Fax: 781.326.8703

APOS[15:0]

DGND

VADIV[7:0]

WGAIN[11:0]

VAGAIN[11:0]

DIN DOUT SCLK

SERIAL INTERFACE

REGISTERS AND

DFC

WDIV[7:0]

IRQ

ADE7763

CFNUM[11:0]

CFDEN[11:0]

Energy Metering IC

SAG

ADE7763

www.analog.com

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