EVAL-ADE7763EB Datasheet

IC型号：
EVAL-ADE7763EB
PDF描述：
Single-Phase Active and Apparent Energy Metering IC
文件大小：
1564.53KB
PDF页数：
56页
芯片厂家：
AD

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Single-Phase Active and Apparent

Energy Metering IC

ADE7763

FEATURES

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

IEC62053-22

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

sensors with di/dt output

A PGA in the current channel allows direct interface to

shunts and current transformers

Active and apparent energy, sampled waveform, and current

and voltage rms

Less than 0.1% error in active energy measurement over a

dynamic range of 1000 to 1 at 25掳C

Positive-only energy accumulation mode available

On-chip user programmable threshold for line voltage surge

and SAG and PSU supervisory

Digital calibration for power, phase, and input offset

On-chip temperature sensor (卤3掳C typical)

SPI庐-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)

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.

GENERAL DESCRIPTION

The ADE7763

features proprietary ADCs and fixed function

DSP for high accuracy over large variations in environmental

conditions and time. The ADE7763 incorporates two second-

order, 16-bit

危-鈭?/div>

ADCs, a digital integrator (on Ch1), reference

circuitry, a temperature sensor, and all the signal processing

FUNCTIONAL BLOCK DIAGRAM

AVDD

PGA

V1P

RESET

INTEGRATOR

DVDD

DGND

WGAIN[11:0]

MULTIPLIER

ADE7763

LPF2

ADC

V1N

HPF1

TEMP

SENSOR

APOS[15:0]

IRMSOS[11:0]

VAGAIN[11:0]

CFNUM[11:0]

PGA

V2P

VRMSOS[11:0]

DFC

CFDEN[11:0]

ADC

V2N

桅

PHCAL[5:0]

LPF1

VADIV[7:0]

WDIV[7:0]

REGISTERS AND

SERIAL INTERFACE

SAG

2.4V

REFERENCE

鈩?/div>

AGND

REF

IN/OUT

CLKIN CLKOUT

DIN DOUT SCLK

IRQ

Figure 1.

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

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.

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

Tel: 781.329.4700

www.analog.com

Fax: 781.326.8703

04481-A-001

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