ADUM1280 Datasheet, PDF (1/16 Pages) Analog Devices – 3 kV RMS Dual Channel Digital Isolators

Data Sheet
3 kV RMS Dual Channel Digital Isolators
ADuM1280/ADuM1281/ADuM1285/ADuM1286
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
ADuM1280/
V_DD1 1 _ADuM1285
V_IA 2
ENCODE
DECODE
8 V_DD2
7 V_OA
V_IB 3
ENCODE
DECODE
6 V_OB
GND₁ 4
5 GND₂
Figure 1. ADuM1280/ADuM1285
ADuM1281/
V_DD1 1 _ADuM1286
V_OA 2
DECODE
ENCODE
8 V_DD2
7 V_IA
V_IB 3
ENCODE
DECODE
6 V_OB
GND₁ 4
5 GND₂
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.}
Rev. 0
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