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ADE7912 데이터시트(PDF) 1 Page - Analog Devices

부품명 ADE7912
상세설명  3-Channel, Isolated, Sigma-Delta ADC with SPI
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ADE7912 데이터시트(HTML) 1 Page - Analog Devices

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3-Channel, Isolated,
Sigma-Delta ADC with SPI
Data Sheet
ADE7912/ADE7913
Rev. 0
Document Feedback
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
©2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
Two (ADE7912) or three (ADE7913) 24-bit isolated, Σ-Δ
analog-to-digital converters (simultaneously sampling
ADCs)
Integrated isoPower, isolated dc-to-dc converter
On-chip temperature sensor
4-wire SPI serial interface
Up to 4 ADE7912/ADE7913 devices clocked from a single
crystal or an external clock
Synchronization of multiple ADE7912/ADE7913 devices
±31.25 mV peak input range for current channel
±500 mV peak input range for voltage channels
Reference drift: 10 ppm/°C typical
Single 3.3 V supply
20-lead, wide-body SOIC package with 8.3 mm creepage
Operating temperature: −40°C to +85°C
Safety and regulatory approvals (pending)
UL recognition
5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
IEC 61010-1: 400 V rms
VDE certificate of conformity
DIN VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 846 V peak
APPLICATIONS
Shunt-based polyphase meters
Power quality monitoring
Solar inverters
Process monitoring
Protective devices
Isolated sensor interfaces
Industrial PLCs
TYPICAL APPLICATIONS CIRCUIT
Figure 1.
GENERAL DESCRIPTION
The ADE7912/ADE79131 are isolated, 3-channel Σ-Δ ADCs for
polyphase energy metering applications using shunt current
sensors. Data and power isolation are based on the Analog Devices,
Inc., iCoupler® technology. The ADE7912 features two 24-bit
ADCs, and the ADE7913 features three ADCs. The current ADC
provides a 67 dB signal-to-noise ratio over a 3 kHz signal
bandwidth, whereas the voltage ADCs provide a SNR of 72 dB over
the same bandwidth. One channel is dedicated to measuring the
voltage across a shunt when the shunt is used for current sensing.
Up to two additional channels are dedicated to measuring
voltages, which are usually sensed using resistor dividers. One
voltage channel can be used to measure the temperature of the die
via an internal sensor. The ADE7913 includes three channels:
one current and two voltage channels. The ADE7912 has one
voltage channel but is otherwise identical to the ADE7913.
1 Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329; 6,262,600; 7,489,526; 7,558,080. Other patents are pending.
NEUTRAL
PHASE
C
ISOLATION
BARRIER
LOAD
PHASE
A
EARTH
PHASE
B
PHASE A
ADE7912/
ADE7913
IP
IM
V1P
VM
V2P
GNDMCU
GNDISO_A
3.3V
PHASE B
ADE7912/
ADE7913
IP
IM
V1P
VM
V2P
GNDMCU
GNDISO_B
3.3V
PHASE C
ADE7912/
ADE7913
IP
IM
V1P
VM
V2P
GNDMCU
GNDISO_C
3.3V
NEUTRAL
LINE
ADE7912/
ADE7913
(OPTIONAL)
IP
IM
V1P
VM
V2P
GNDMCU
GNDISO_N
3.3V
3.3V
GNDMCU


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