EVAL-ADE7953EBZ【PDF 1/72 页】BOARD EVAL FOR ADE7953

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Sheet目录1214

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Single Phase, Multifunction Metering IC

with Neutral Current Measurement

Data Sheet

FEATURES

Highly accurate; supports EN 50470-1, EN 50470-3, IEC 62053-

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

Measures active, reactive, and apparent energy; sampled

waveform; current and voltage rms

Provides a second current input for neutral current

measurement

Less than 0.1% error in active and reactive energy

measurements over a dynamic range of 3000:1

Less than 0.2% error in instantaneous IRMS measurement

over a dynamic range of 1000:1

Provides apparent energy measurement and instantaneous

power readings

1.23 kHz bandwidth operation

Flexible PGA gain stage (up to ×22)

Includes internal integrators for use with Rogowski coil sensors

SPI, I 2 C, or UART communication

GENERAL DESCRIPTION

The ADE7953 is a high accuracy electrical energy measurement

IC intended for single phase applications. It measures line voltage

and current and calculates active, reactive, and apparent energy,

ADE7953

The device incorporates three Σ-Δ ADCs with a high accuracy

energy measurement core. The second input channel simulta-

neously measures neutral current and enables tamper detection

and neutral current billing. The additional channel incorporates

a complete signal path that allows a full range of measurements.

Each input channel supports independent and flexible gain stages,

making the device suitable for use with a variety of current sensors

such as current transformers (CTs) and low value shunt resistors.

Two on-chip integrators facilitate the use of Rogowski coil sensors.

The ADE7953 provides access to on-chip meter registers via a

variety of communication interfaces including SPI, I 2 C, and UART.

Two configurable low jitter pulse output pins provide outputs that

are proportional to active, reactive, or apparent energy, as well as

current and voltage rms. A full range of power quality information

such as overcurrent, overvoltage, peak, and sag detection are

accessible via the external IRQ pin. Independent active, reactive,

and apparent no-load detections are included to prevent “meter

creep.” Dedicated reverse power (REVP), zero-crossing voltage

(ZX), and zero-crossing current (ZX_I) pins are also provided. The

ADE7953 energy metering IC operates from a 3.3 V supply voltage

and is available in a 28-lead LFCSP package.

as well as instantaneous rms voltage and current.

FUNCTIONAL BLOCK DIAGRAM

REF

RESET

VDD

VINTA

VINTD

AIRMSOS

ADE7953

LOW

1.2V REF

DIGITAL

X 2

LPF

AIRMS

AVAGAIN

NOISE

PRE-AMP

AIGAIN

INTEGRATOR

IAP

X 2

LPF

AVRMS

IAN

PGA

ADC

HPF

VRMSOS

APHCAL

VGAIN

AWGAIN

AWATTOS

CF1DEN

PGA

ADC

HPF

LPF

DFC

CF1

PHASE

IBP

IBN

PGA

ADC

ACTIVE, REACTIVE AND

APPARENT ENERGIES AND

VOLTAGE/CURRENT RMS

CALCULATION FOR PHASE B

(SEE PHASE A FOR DETAILED

DATA PATH).

COMPUTATIONAL

BLOCK FOR TOTAL

REACTIVE POWER

AVARGAIN

AVAROS

A AND B

DATA

DFC

CF2DEN

CF2

AGND

CONFIGURATION

AND CONTROL

REVP

ZX_I

PEAK

REVP

ZX_I

DGND

UART

SPI INTERFACE

I 2 C

ANGLE

POWER FACTOR

SAG

CLKIN

CLKOUT

IRQ

MISO/

MOSI/

SCLK

Figure 1.

SDA/Tx

SCL/Rx

Rev. B

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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