EVAL-ADE7759EBZ【PDF 1/36 页】BOARD EVALUATION FOR ADE7759

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录1214

[1页]2页 3页 4页 5页

FEATURES

High Accuracy, Supports IEC 687/1036

On-Chip Digital Integrator Allows Direct Interface with

Current Sensors with di/dt Output Such as Rogowski Coil

Less Than 0.1% Error over a Dynamic Range of 1000 to 1

On-Chip User-Programmable Threshold for Line Voltage

SAG Detection and PSU Supervisory

Supplies Sampled Waveform Data and Active Energy

(40 Bits)

Digital Power, Phase, and Input DC Offset Calibration

On-Chip Temperature Sensor (Typical 1 LSB/ C Resolution)

SPI Compatible Serial Interface

Pulse Output with Programmable Frequency

Interrupt Request Pin (IRQ) and IRQ Status Register

Proprietary ADCs and DSP provide High Accuracy over

Large Variations in Environmental Conditions and Time

Active Energy Metering IC with

di/dt Sensor Interface

ADE7759 *

can be switched off if the ADE7759 is used with conventional

current sensors.

The ADE7759 contains a sampled waveform register and an

active energy register capable of holding at least 11.53 seconds

of accumulated power at full ac load. Data is read from the

ADE7759 via the serial interface. The ADE7759 also provides a

pulse output (CF) with frequency that is proportional to the

active power.

In addition to active power information, the ADE7759 also

provides various system calibration features, i.e., channel offset

correction, phase calibration, and power offset correction. The

part also incorporates a detection circuit for short duration

voltage drop (SAG). The voltage threshold and the duration (in

number of half-line cycles) of the drop are user programmable.

An open-drain logic output ( SAG ) goes active low when a sag

Reference 2.4 V

8% (20 ppm/ C Typical) with External

event occurs.

Overdrive Capability

Single 5 V Supply, Low Power Consumption (25 mW

Typical)

GENERAL DESCRIPTION

The ADE7759 is an accurate active power and energy measure-

ment IC with a serial interface and a pulse output. The ADE7759

incorporates two second-order Σ - ? ADCs, a digital integrator

(on CH1), reference circuitry, temperature sensor, and all the

signal processing required to perform active power and energy

measurement.

An on-chip digital integrator allows direct interface to di/dt

current sensors such as a Rogowski coil. The digital integrator

eliminates the need for an external analog integrator and pro-

vides excellent long-term stability and precise phase matching

between the current and the voltage channels. The integrator

A zero crossing output (ZX) produces an output that is synchro-

nized to the zero crossing point of the line voltage. This output

can be used to extract timing or frequency information from the

line. The signal is also used internally to the chip in the line

cycle energy accumulation mode; i.e., the number of half-line

cycles in which the energy accumulation occurs can be con-

trolled. Line cycle energy accumulation enables a faster and

more precise energy accumulation and is especially useful dur-

ing calibration. This signal is also useful for synchronization of

relay switching with a voltage zero crossing.

The interrupt request output is an open drain, active low logic

output. The interrupt status register indicates the nature of the

interrupt, and the interrupt enable register controls which event

produces an output on the IRQ pin. The ADE7759 is available

in a 20-lead SSOP package.

FUNCTIONAL BLOCK DIAGRAM

AV DD

RESET

DV DD

DGND

V1P

V1N

ADC

MULTIPLIER

INTEGRATOR MULTIPLIER

ADE7759

LPF2

SAG

HPF1

TEMP

APGAIN[11:0]

APOS[15:0]

SENSOR

PHCAL[7:0]

V2P

V2N

ADC

DFC

2.4V

REFERENCE

REGISTERS AND

SERIAL INTERFACE

CFNUM[11:0]

CFDEN[11:0]

LPF1

AGND

REF IN/OUT

DIN DOUT SCLK

IRQ

CLKIN CLKOUT

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

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. 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 companies.

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

Tel: 781/329-4700 www.analog.com

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式