Data Sheet
FEATURES
Qualified for automotive applications
Low power operation
5 V operation
1.0 mA per channel maximum @ 0 Mbps to 2 Mbps
3.5 mA per channel maximum @ 10 Mbps
31 mA per channel maximum @ 90 Mbps
3 V operation
0.7 mA per channel maximum @ 0 Mbps to 2 Mbps
2.1 mA per channel maximum @ 10 Mbps
20 mA per channel maximum @ 90 Mbps
Bidirectional communication
3 V/5 V level translation
High temperature operation: 125°C
High data rate: dc to 90 Mbps (NRZ)
Precise timing characteristics
2 ns maximum pulse width distortion
2 ns maximum channel-to-channel matching
High common-mode transient immunity: >25 kV/μs
Output enable function
16-lead SOIC wide body package
RoHS-compliant models available
UL recognition: 2500 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
TÜV approval: IEC/EN/UL/CSA 61010-1
Quad-Channel Digital Isolators
GENERAL DESCRIPTION
The ADuM140x
are quad-channel digital isolators based on
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.
By avoiding the use of LEDs and photodiodes,
iCoupler
devices
remove the design difficulties commonly associated with opto-
couplers. The typical optocoupler concerns regarding uncertain
current transfer ratios, nonlinear transfer functions, and
temperature and lifetime effects are eliminated with the simple
iCoupler
digital interfaces and stable performance characteristics.
The need for external drivers and other discrete components
is eliminated with these
iCoupler
products. Furthermore,
iCoupler
devices consume one-tenth to one-sixth of the power
of optocouplers at comparable signal data rates.
The ADuM140x isolators provide four independent isolation
channels in a variety of channel configurations and data rates
(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. In
addition, the ADuM140x provides low pulse width distortion
(<2 ns for CRW grade) and tight channel-to-channel matching
(<2 ns for CRW grade). Unlike other optocoupler alternatives,
the ADuM140x isolators have a patented refresh feature that
ensures dc correctness in the absence of input logic transitions
and when power is not applied to one of the supplies.
1
APPLICATIONS
General-purpose multichannel isolation
SPI interface/data converter isolation
RS-232/RS-422/RS-485 transceivers
Industrial field bus isolation
Automotive systems
Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329.
FUNCTIONAL BLOCK DIAGRAMS
V
DD1 1
GND
1 2
V
IA 3
V
IB 4
V
IC 5
V
ID 6
NC
7
GND
1 8
ENCODE
ENCODE
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
16
V
DD2
15
GND
2
14
V
OA
13
V
OB
12
V
OC
11
V
OD
03786-001
V
DD1 1
GND
1 2
V
IA 3
V
IB 4
V
IC 5
V
OD 6
V
E1 7
GND
1 8
ENCODE
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
ENCODE
16
15
14
13
12
11
10
9
V
DD2
GND
2
V
OA
V
OB
V
OC
V
ID
03786-002
V
DD1 1
GND
1 2
V
IA 3
V
IB 4
V
OC 5
V
OD 6
V
E1 7
GND
1 8
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
ENCODE
ENCODE
16
15
14
13
12
11
10
9
V
DD2
GND
2
V
OA
V
OB
V
IC
V
ID
03786-003
10
V
E2
9
GND
2
V
E2
GND
2
V
E2
GND
2
Figure 1. ADuM1400
Figure 2. ADuM1401
Figure 3. ADuM1402
Rev. H
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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. Specifications subject to change without notice. No
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