EVAL-ADE7763ZEB【PDF 1/56 页】BOARD EVALUATION FOR ADE7763

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Sheet目录1214

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Single-Phase Active and Apparent

Energy Metering IC

Data Sheet

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°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 (±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 1 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

Σ -? ADCs, a digital integrator (on Ch1), reference circuitry, a

ADE7763

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.

temperature sensor, and all the signal processing required to

FUNCTIONAL BLOCK DIAGRAM

AVDD

RESET

DVDD

DGND

V1P

PGA

INTEGRATOR

MULTIPLIER

LPF2

WGAIN[11:0]

ADE7763

V1N

TEMP

ADC

HPF1

APOS[15:0]

SENSOR

IRMSOS[11:0]

LPF3

CFNUM[11:0]

PGA

x 2

VRMSOS[11:0]

VAGAIN[11:0]

DFC

CFDEN[11:0]

V2P

V2N

ADC

PHCAL[5:0]

LPF1

|x|

LPF3

VADIV[7:0]

WDIV[7:0]

2.4V

REFERENCE

4kΩ

REGISTERS AND

SERIAL INTERFACE

SAG

AGND

REF IN/OUT

CLKIN CLKOUT

DIN DOUT SCLK

IRQ

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

Figure 1.

Rev. C

Document Feedback

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.

Technical Support www.analog.com

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