ADE7752BARWZ-RL【PDF 1/24 页】IC ENERGY METERING 3PHASE 24SOIC

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3-Phase, 3-Wire, and 4-Wire

Energy Metering IC with Pulse Output

ADE7752B

FEATURES

High accuracy supports 50 Hz/60 Hz IEC 62053-21

Less than 0.1% error over a dynamic range of 500 to 1

Compatible with 3-phase, 3-wire delta and 3-phase, 4-wire

Wye configurations

Supplies average active power on the frequency outputs F1

and F2

High frequency output (CF) is intended for calibration and

supplies instantaneous active power

Logic output REVP indicates a potential miswiring or

negative power on the sum of all phases

Direct drive for electromechanical counters and 2-phase

stepper motors (F1 and F2)

Proprietary ADCs and DSP provide high accuracy over large

variations in environmental conditions and time

On-chip power supply monitoring

On-chip creep protection (no load threshold)

On-chip reference 2.4 V ± 8% (25 ppm/°C typical) with

external overdrive capability

Single 5 V supply, low power (42.5 mW typical)

Low cost CMOS process

GENERAL DESCRIPTION

The only analog circuitry used in the ADE7752B is in the

analog-to-digital converters (ADCs) and reference circuit. All

other signal processing (for example, multiplication, filtering,

and summation) is carried out in the digital domain. This

approach provides superior stability and accuracy over

extremes in environmental conditions and over time.

The ADE7752B supplies average active power information on

the low frequency outputs, F1 and F2. These logic outputs can

be used to directly drive an electromechanical counter or to

interface with a microcontroller (MCU). The CF logic output

gives instantaneous active power information. This output is

intended to be used for calibration purposes.

The ADE7752B includes a power supply monitoring circuit on

the V DD pin. The ADE7752B remains inactive until the supply

voltage on V DD reaches 4 V. If the supply falls below 4 V, the

ADE7752B resets and no pulses are issued on F1, F2, and CF.

Internal phase matching circuitry ensures that the voltage and

current channels are phase matched. An internal no load

threshold ensures that the ADE7752B does not exhibit any

creep when there is no load.

The ADE7752B is available in a 24-lead SOIC package.

The ADE7752B is a high accuracy polyphase electrical energy

measurement IC. The ADE7752B specifications surpass the

accuracy requirements as quoted in the IEC62053-21 standard.

FUNCTIONAL BLOCK DIAGRAM

ABS

V DD

IAP 5

IAN 6

VAP 16

ADC

HPF

LPF

POWER

SUPPLY

MONITOR

ADE7752B

IBP

IBN

ADC

HPF

LPF

DGND

VBP 15

ADC

19 CLKIN

20 CLKOUT

ICP 9

ICN 10

ADC

HPF

LPF

VCP 14

VN 13

2.4V REF

4k ?

ADC

DIGITAL-TO-FREQUENCY CONVERTER

AGND

REF IN/OUT

REVP SCF

Figure 1.

Rev. 0

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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