AD71056

更新时间： 2024-11-24 04:04:15

品牌	Logo	应用领域
亚德诺 - ADI		振荡器
页数	文件大小	规格书
20页	412K
描述
Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication

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AD71056 数据手册

Energy Metering IC with Integrated

Oscillator and Reverse Polarity Indication

AD71056

FEATURES

On-chip oscillator as clock source

The AD71056 specifications surpass the accuracy requirements

as quoted in the IEC62053-21 standard.

High accuracy, supports 50 Hz/60 Hz IEC62053-21

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

Supplies average real power on frequency outputs (F1, F2)

High frequency output (CF) calibrates and supplies

instantaneous real power

Logic output (REVP) indicates potential miswiring or

negative power

Direct drive for electromechanical counters and 2-phase

stepper motors (F1, F2)

The only analog circuitry used in the AD71056 is in the Σ-Δ

ADCs and reference circuit. All other signal processing, such as

multiplication and filtering, is carried out in the digital domain.

This approach provides superior stability and accuracy over

time and in extreme environmental conditions.

The AD71056 supplies average real power information on F1

and F2, the low frequency outputs. These outputs either directly

drive an electromechanical counter or interface with an MCU.

The high frequency CF logic output, ideal for calibration

purposes, provides instantaneous real power information.

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 2.45 V (20 ppm/°C typical) with external

overdrive capability

Single 5 V supply, low power (20 mW typical)

Low cost CMOS process

The AD71056 includes a power supply monitoring circuit on

the V_DDsupply pin. The AD71056 remains inactive until the

supply voltage on V_DDreaches approximately 4 V. If the supply

falls below 4 V, the AD71056 also remains inactive and the F1,

F2, and CF outputs are in their nonactive modes.

GENERAL DESCRIPTION

Internal phase matching circuitry ensures that the voltage and

current channels are phase matched, and the HPF in the current

channel eliminates dc offsets. An internal no load threshold

ensures that the AD71056 does not exhibit creep when no load

is present.

The AD71056¹is a high accuracy, electrical energy metering IC

with a precise oscillator circuit that serves as a clock source to

the chip. The AD71056 eliminates the need for an external

crystal or resonator, thus reducing the overall cost of building a

meter with this IC. The chip directly interfaces with the shunt

resistor.

The part is available in a 16-lead, narrow body SOIC package.

FUNCTIONAL BLOCK DIAGRAM

AGND

DGND

AD71056

POWER

SUPPLY MONITOR

SIGNAL

PROCESSING

BLOCK

V2P

V2N

...110101...

Σ-Δ

ADC

MULTIPLIER

PHASE

CORRECTION

LPF

...11011001...

V1N

V1P

Σ-Δ

ADC

HPF

DIGITAL-TO-FREQUENCY

CONVERTER

INTERNAL

OSCILLATOR

4kΩ

2.5V

REFERENCE

REF

RCLKIN

REVP CF

SCF

IN/OUT

Figure 1.

¹U.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 registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与AD71056相关器件

型号	品牌	获取价格	描述	数据表
AD71056AR	ADI	获取价格	Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication
AD71056AR-RL	ADI	获取价格	Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication
AD71056ARZ	ADI	获取价格	Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication
AD71056ARZ-RL	ADI	获取价格	Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication
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