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ADE7753 数据表(PDF) 1 Page - Analog Devices

部件名 ADE7753
功能描述  Single-Phase Multifunction Metering IC with di/dt Sensor Interface
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADE7753 数据表(HTML) 1 Page - Analog Devices

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Single-Phase Multifunction Metering IC
with di/dt Sensor Interface
ADE7753
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2003–2010 Analog Devices, Inc. All rights reserved.
FEATURES
High accuracy; supports IEC 60687/61036/61268 and
IEC 62053-21/62053-22/62053-23
On-chip digital integrator enables direct interface to current
sensors with di/dt output
A PGA in the current channel allows direct interface to
shunts and current transformers
Active, reactive, and apparent energy; sampled waveform;
current and voltage rms
Less than 0.1% error in active energy measurement over a
dynamic range of 1000 to 1 at 25°C
Positive-only energy accumulation mode available
On-chip user programmable threshold for line voltage surge
and SAG and PSU supervisory
Digital calibration for power, phase, and input offset
On-chip temperature sensor (±3°C typical)
SPI® compatible serial interface
Pulse output with programmable frequency
Interrupt request pin (IRQ) and status register
Reference 2.4 V with external overdrive capability
Single 5 V supply, low power (25 mW typical)
GENERAL DESCRIPTION
The ADE77531 features proprietary ADCs and DSP for high
accuracy over large variations in environmental conditions and
time. The ADE7753 incorporates two second-order 16-bit -Δ
ADCs, a digital integrator (on CH1), reference circuitry,
temperature sensor, and all the signal processing required to
perform active, reactive, and apparent energy measurements,
line-voltage period measurement, and rms calculation on the
voltage and current. The selectable on-chip digital integrator
provides direct interface to di/dt current sensors such as
Rogowski coils, eliminating the need for an external analog
integrator and resulting in excellent long-term stability and pre-
cise phase matching between the current and voltage channels.
The ADE7753 provides a serial interface to read data, and a
pulse output frequency (CF), which is proportional to the active
power. Various system calibration features, i.e., channel offset
correction, phase calibration, and power calibration, ensure
high accuracy. The part also detects short duration low or high
voltage variations.
The positive-only accumulation mode gives the option to
accumulate energy only when positive power is detected. An
internal no-load threshold ensures that the part does not exhibit
any creep when there is no load. The zero-crossing output (ZX)
produces a pulse that is synchronized to the zero-crossing point
of the line voltage. This signal is used internally in the line cycle
active and apparent energy accumulation modes, which enables
faster calibration.
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, an open-drain, active low logic output.
The ADE7753 is available in a 20-lead SSOP package.
FUNCTIONAL BLOCK DIAGRAM
AVDD
RESET
DVDD
DGND
TEMP
SENSOR
ADC
ADC
DFC
x2
ADE7753
LPF2
MULTIPLIER
INTEGRATOR
CLKIN CLKOUT
DIN DOUT SCLK
REFIN/OUT
CS
IRQ
AGND
APOS[15:0]
VAGAIN[11:0]
VADIV[7:0]
IRMSOS[11:0]
VRMSOS[11:0]
WGAIN[11:0]
dt
REGISTERS AND
SERIAL INTERFACE
CFNUM[11:0]
CFDEN[11:0]
2.4V
REFERENCE
4k
PHCAL[5:0]
HPF1
LPF1
02875-A-001
V1P
V1N
V2N
V2P
PGA
PGA
ZX
SAG
CF
WDIV[7:0]
%
%
2
|x|
Figure 1.
1U.S. Patents 5,745,323; 5,760,617; 5,862,069; 5,872,469.


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