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ADUM1281CRZ-RL7 Datasheet(PDF) 1 Page - Analog Devices

Part # ADUM1281CRZ-RL7
Description  3 kV RMS Dual Channel Digital Isolators
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADUM1281CRZ-RL7 Datasheet(HTML) 1 Page - Analog Devices

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3 kV RMS Dual Channel Digital Isolators
Data Sheet
ADuM1280/ADuM1281/ADuM1285/ADuM1286
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
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
©2012 Analog Devices, Inc. All rights reserved.
FEATURES
Up to 100 Mbps data rate (NRZ)
Low propagation delay: 20 ns typical
Low dynamic power consumption
Bidirectional communication
3 V to 5 V level translation
High temperature operation: 125°C
High common-mode transient immunity: >25 kV/μs
Default high output: ADuM1280/ADuM1281
Default low output: ADuM1285/ADuM1286
Narrow body, RoHS-compliant, 8-lead SOIC
Safety and regulatory approvals (pending)
UL recognition: 3000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE Certificate Of Conformity
DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
V
IORM = 560 V peak
APPLICATIONS
General-purpose multichannel isolation
Data converter isolation
Industrial field bus isolation
GENERAL DESCRIPTION
The ADuM1280/ADuM1281/ADuM1285/ADuM12861 (also
referred to as ADuM128x in this data sheet) are dual-channel
digital isolators based on the Analog Devices, Inc., iCoupler®
technology. Combining high speed CMOS and monolithic air
core transformer technology, these isolation components
provide outstanding performance characteristics superior to
alternatives, such as optocoupler devices and other integrated
couplers.
With propagation delay at 20 ns, pulse width distortion is less
than 2 ns for C grade. Channel-to-channel matching is tight at
5 ns for C grade. The two channels of the ADuM128x are
independent isolation channels and are available in two channel
configurations with three different data rates up to 100 Mbps
(see the Ordering Guide). All models operate with the supply
voltage on either side ranging from 2.7 V to 5.5 V, providing
compatibility with lower voltage systems as well as enabling a
voltage translation functionality across the isolation barrier.
Unlike other optocoupler alternatives, the ADuM128x isolators
have a patented refresh feature that ensures dc correctness in
the absence of input logic transitions. When power is first
applied or is not yet applied to the input side, the ADuM1280
and ADuM1281 have a default high output, and the ADuM1285
and ADuM1286 have a default low output.
For more information on safety and regulatory approvals, go to
http://www.analog.com/icouplersafety.
FUNCTIONAL BLOCK DIAGRAMS
ENCODE
DECODE
ENCODE
DECODE
VDD1
VIA
VIB
GND1
VDD2
VOA
VOB
GND2
1
2
3
4
8
7
6
5
ADuM1280/
ADuM1285
Figure 1. ADuM1280/ADuM1285
ENCODE
DECODE
DECODE
ENCODE
VDD1
VOA
VIB
GND1
VDD2
VIA
VOB
GND2
1
2
3
4
8
7
6
5
ADuM1281/
ADuM1286
Figure 2. ADuM1281/ADuM1286
1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329. Other patents are pending.


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