AD7755BRS

更新时间： 2024-11-26 13:05:23

品牌	Logo	应用领域
亚德诺 - ADI		脉冲
页数	文件大小	规格书
16页	251K
描述
IC SPECIALTY ANALOG CIRCUIT, PDSO24, SSOP-24, Analog IC:Other

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AD7755BRS 数据手册

Energy Metering IC

with Pulse Output

AD7755*

FEATURES

GENERAL DESCRIPTION

High Accuracy, Supports 50 Hz/60 Hz IEC 687/1036

Less than 0.1% Error Over a Dynamic Range of

500 to 1

The AD7755 Supplies Average Real Power on the

Frequency Outputs F1 and F2

The AD7755 is a high accuracy electrical energy measurement

IC. The part specifications surpass the accuracy requirements

as quoted in the IEC1036 standard. See Analog Devices’

Application Note AN-559 for a description of an IEC1036

watt-hour meter reference design.

The High Frequency Output CF Is Intended for

Calibration and Supplies Instantaneous Real Power

The Logic Output REVP Can Be Used to Indicate a

Potential Miswiring or Negative Power

Direct Drive for Electromechanical Counters and

Two Phase Stepper Motors (F1 and F2)

A PGA in the Current Channel Allows the Use of Small

Values of Shunt and Burden Resistance

Proprietary ADCs and DSP Provide High Accuracy over

Large Variations in Environmental Conditions and

Time

The only analog circuitry used in the AD7755 is in the ADCs

and reference circuit. All other signal processing (e.g., multipli-

cation and filtering) is carried out in the digital domain. This

approach provides superior stability and accuracy over extremes

in environmental conditions and over time.

The AD7755 supplies average real power information on the

low frequency outputs F1 and F2. These logic outputs may be

used to directly drive an electromechanical counter or interface

to an MCU. The CF logic output gives instantaneous real power

information. This output is intended to be used for calibration

purposes, or interfacing to an MCU.

On-Chip Power Supply Monitoring

On-Chip Creep Protection (No Load Threshold)

On-Chip Reference 2.5 V 6 8% (30 ppm/8C Typical)

with External Overdrive Capability

Single 5 V Supply, Low Power (15 mW Typical)

Low Cost CMOS Process

The AD7755 includes a power supply monitoring circuit on the

AV_DDsupply pin. The AD7755 will remain in a reset condition

until the supply voltage on AV_DDreaches 4 V. If the supply falls

below 4 V, the AD7755 will also be reset and no pulses will be

issued on F1, F2 and CF.

Internal phase matching circuitry ensures that the voltage and

current channels are phase matched whether the HPF in Chan-

nel 1 is on or off. An internal no-load threshold ensures that the

AD7755 does not exhibit any creep when there is no load.

The AD7755 is available in 24-lead DIP and SSOP packages.

FUNCTIONAL BLOCK DIAGRAM

G0 G1

AGND

AC/DC

DGND

AD7755

POWER

SUPPLY MONITOR

PHASE

SIGNAL

PROCESSING

BLOCK

CORRECTION

...110101...

V1P

V1N

ADC

⌽

PGA

x1, x2, x8, x16

HPF

LPF

MULTIPLIER

...11011001...

V2P

V2N

ADC

DIGITAL-TO-FREQUENCY

CONVERTER

RESET

4k⍀

2.5V

REFERENCE

CLKIN CLKOUT

REVP

REF

SCF

IN/OUT

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

REV. B

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

12 3 4 5 6 7...16

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与AD7755BRS相关器件

型号	品牌	获取价格	描述	数据表
AD7756AN	ROCHESTER	获取价格	SPECIALTY ANALOG CIRCUIT, PDIP20, PLASTIC, DIP-20
AD7756ARS	ADI	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO20, SSOP-20, Analog IC:Other
AD7756ARS	ROCHESTER	获取价格	SPECIALTY ANALOG CIRCUIT, PDSO20, SSOP-20
AD7756ARSRL	ADI	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO20, SSOP-20, Analog IC:Other
AD7756BN	ADI	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDIP20, PLASTIC, DIP-20, Analog IC:Other
AD7756BRS	ADI	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO20, SSOP-20, Analog IC:Other
AD775JN	ADI	获取价格	8-Bit 20 MSPS, 60 mW Sampling A/D Converter
AD775JR	ADI	获取价格	8-Bit 20 MSPS, 60 mW Sampling A/D Converter
AD776	ADI	获取价格	16-Bit 100 kSPS Oversampling ADC
AD7760	ADI	获取价格	2.5 MSPS, 20-Bit ADC

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