Datasheet > AD7756BRS

AD7756BRS

更新时间： 2024-01-04 21:13:26

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管
页数	文件大小	规格书
29页	382K
描述
IC SPECIALTY ANALOG CIRCUIT, PDSO20, SSOP-20, Analog IC:Other

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AD7756BRS 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	SSOP	包装说明：	SSOP-20
针数：	20	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.65	Is Samacsys：	N
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	R-PDSO-G20
JESD-609代码：	e0	长度：	7.2 mm
功能数量：	1	端子数量：	20
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SSOP
封装等效代码：	SSOP20,.3	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	2 mm	子类别：	Other Analog ICs
最大供电电流 (Isup)：	5 mA	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	4.5 V	标称供电电压 (Vsup)：	5 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	5.3 mm	Base Number Matches：	1

AD7756BRS 数据手册

Active Energy Metering IC

with Serial Interface

Preliminary Technical Data

AD7756*

FEATURES

High Accuracy, supports IEC 687/1036

Less than 0.1% error over a dynamic

range of 500 to 1

T he AD7756 contains a sampled waveform register and an

Active Energy register capable of holding at least 5

seconds of accumulated power at full load. Data is read

from the AD7756 via the serial interface. T he AD7756

also provides a pulse output (CF) with a frequency which

is proportional to the active power.

Besides real power information the AD7756 also provides

system calibration features, i.e., channel offset correction,

phase calibration and power calibration. T he part also

incorporates a detection circuit for short duration low

voltage variations or sags. T he voltage threshold level and

the duration (no. of half line cycles) of the variation are

user programmable. An open drain logic output (SAG)

goes active low when a sag event occurs.

A zero crossing output (ZX) produces an output which is

synchronized to the zero crossing point of the line voltage.

T his output can be used to extract timing or frequency

information from the line. T he signal is also used internally to

the chip in the calibration mode. T his permits faster and more

accurate calibration of the real power calculation. T his signal is

also useful for synchronization of relay switching with a

voltage zero crossing, thus improving the relay life by

reducing the risk of arcing.

T he interrupt request output is an open drain, active low logic

output. T he IRQ output will become active when the accumu-

lated real power register is half full and also when it over flows.

A status register will indicate the nature of the interrupt.

T he AD7756 is available in 20 pin DIP and 20 lead SSOP

packages.

An On-Chip user Programmable threshold for line

voltage SAG detection and PSU supervisory.

The AD7756 supplies Sampled Waveform Data

and Active Energy (40 Bits).

Digital Power, Phase & Input Offset Calibration.

An On-Chip temperature sensor ( 3ꢀC typical after calibration)

A SPI compatible Serial Interface.

A pulse output with programmable frequency.

An Interrupt Request line (IRQ) and Status register

provide early warning of register overflow

Proprietary ADCs and DSP provide high accuracy over

large variations in environmental conditions and time.

Reference 2.5V 8% (30 ppm/ꢀC typical)

with external overdrive capability

Single 5V Supply, Low power (15mW typical)

GENERAL DESCRIPTION

T he AD7756 is a high accuracy electrical power measurement

IC with a serial interface and a pulse output. T he AD7756

incorporates two second order sigma delta ADCs, refer-

ence circuitry, temperature sensor and all the signal

processing required to perform active power and energy

measurement.

FUNTIONAL BLOCK DIAGRAM

DVDD

DGND

AVDD

RESET

PGA

MULTIPLIER

HPF1 MULTIPLIER LPF2

AD7756

V1P

V1N

ADC

SAG

APGAIN[11:0]

TEMP

SENSOR

APOS[11:0]

PHCAL[7:0]

V2P

V2N

DFC

ADC

4kΩ

AD7756 REGISTERS &

SERIAL INTERFACE

2.5V

REFERENCE

CFDIV[11:0]

LPF1

IRQ

AGND

DIN DOUT SCLK CS

CLKIN CLKOUT

REF

IN/OUT

*Patents Pending.

REV. PrG 07/00

Inform ation furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assum ed by Analog Devices for its

use, nor for any infringem ents of patents or other rights of third parties

which m ay result from its use. No license is granted by im plication 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.

Tel1781/329-4700

Fax: 781/326-8703

http://www.analog.com

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