Quad Channel, High Speed
Digital Isolators
Data Sheet
ADuM3440/ADuM3441/ADuM3442
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Low power operation
5 V operation
1
2
3
16
15
14
V
ADuM3440
V
DD2
DD1
GND
V
GND
1
2
ENCODE
ENCODE
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
V
1.7 mA per channel maximum @ 0 Mbps to 2 Mbps
68 mA per channel maximum @ 150 Mbps
3.3 V operation
1.0 mA per channel maximum @ 0 Mbps to 2 Mbps
33 mA per channel maximum @ 150 Mbps
Bidirectional communication
IA
IB
OA
V
4
5
13
12
V
OB
V
V
V
IC
ID
OC
6
7
8
11
10
9
V
OD
NC
GND
V
E2
GND
1
2
Figure 1. ADuM3440 Functional Block Diagram
3.3 V/5 V level translation
High temperature operation: 105°C
High data rate: dc to 150 Mbps (NRZ)
Precise timing characteristics
5 ns maximum pulse width distortion
5 ns maximum channel-to-channel matching
High common-mode transient immunity: >25 kV/μs
Output enable function
16-lead SOIC wide body package
Safety and regulatory approvals
UL recognition: 2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity
ADuM3441
1
2
3
16
15
14
V
V
DD1
DD2
GND
GND
1
2
V
V
ENCODE
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
ENCODE
V
V
V
IA
OA
OB
OC
4
5
13
12
IB
V
IC
6
7
8
11
10
9
V
V
V
OD
ID
V
E1
E2
GND
GND
1
2
Figure 2. ADuM3441 Functional Block Diagram
1
2
3
16
15
14
V
ADuM3442
V
DD1
DD2
GND
GND
1
2
V
V
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
ENCODE
ENCODE
V
V
V
IA
OA
OB
IC
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
4
5
13
12
IB
V
IORM = 560 V peak
V
V
OC
OD
APPLICATIONS
6
7
8
11
10
9
V
V
ID
V
High speed multichannel isolation
SPI interface/data converter isolation
Instrumentation
E1
E2
GND
GND
1
2
Figure 3. ADuM3442 Functional Block Diagram
GENERAL DESCRIPTION
The ADuM344x1 are four channel, digital isolators based on the
Analog Devices, Inc., iCoupler® technology supporting data rates
up to 150 Mbps. Combining high speed CMOS and monolithic
air core transformer technology, these isolation components
provide outstanding performance characteristics superior to
alternatives such as optocoupler devices.
Furthermore, iCoupler devices consume one-tenth to one-sixth
the power of optocouplers at comparable signal data rates.
The ADuM344x isolators provide four independent isolation
channels in a variety of channel configurations (see the
Ordering Guide). The ADuM344x operates with the supply
voltage on either side ranging from 3.0 V to 5.5 V, providing
compatibility with lower voltage systems as well as enabling
voltage translation functionality across the isolation barrier. In
addition, the ADuM344x provides low pulse width distortion
and tight channel-to-channel matching. Unlike other opto-
coupler alternatives, the ADuM344x isolators have a patented
refresh feature that ensures dc correctness in the absence of
input logic transitions and during the power-up/power-down
condition.
By avoiding the use of LEDs and photodiodes, iCoupler
devices remove the design difficulties commonly associated
with optocouplers. 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.
1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329.
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
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 ©2007–2012 Analog Devices, Inc. All rights reserved.
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