Small, 3.75 kV RMS Quad Digital Isolators
ADuM3480/ADuM3481/ADuM3482
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Up to 25 Mbps data rate (NRZ)
ADuM3480
1
2
20
19
18
17
16
15
14
13
12
11
V
V
DDL2
Low propagation delay: 25 ns typical
Low dynamic power consumption
1.8 V to 5 V level translation
High temperature operation: 125°C
High common-mode transient immunity: >25 kV/µs
Output default select
20-lead, RoHS-compliant, SSOP package
Safety and regulatory approvals:
UL recognition: 3750 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity
DDL1
GND
GND
2
1
IA
IB
IC
ID
ENCODE
ENCODE
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
3
V
V
V
V
V
V
V
V
OA
OB
OC
OD
4
5
6
7
NC
CTRL
2
REG
REG
8
V
V
V
DD1
DD2
DDC2
9
V
DDC1
10
GND
GND
1
2
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
V
IORM = 560 V peak
Figure 1. ADuM3480
APPLICATIONS
ADuM3481
1
2
20
19
18
17
16
15
14
13
12
11
V
V
DDL2
DDL1
General-purpose multichannel isolation
SPI interface/data converter isolation
Industrial field bus isolation
GND
V
GND
1
2
ENCODE
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
ENCODE
3
V
IA
IB
IC
OA
4
V
V
V
V
V
OB
OC
ID
GENERAL DESCRIPTION
5
The ADuM3480/ADuM3481/ADuM34821 are quad-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
typical propagation delay reduced to 25 ns, pulse width
distortion is also halved.
6
V
OD
7
CTRL
V
CTRL
1
2
REG
REG
8
V
DD1
DD2
9
V
V
DDC1
DDC2
10
GND
GND
1
2
Figure 2. ADuM3481
ADuM3482
The four channels of the ADuM3480/ADuM3481/ADuM3482
are available in a variety of channel configurations with two data
rate grades up to 25 Mbps (see the Ordering Guide section). All
models use separate core and I/O power supplies. The core
operates between 3.0 V and 5.5 V, whereas the I/O supply can
range from 1.8 V to 5.5 V. If I/O operation is required within
the range of the core supply, the two supplies can be tied together
to allow single-supply operation. When the I/O must interface
with logic levels that are different from the core supply voltage,
the I/O supply operates independently of the core supply over
its wider range. The minimum I/O supply voltage is 1.8 V, which
allows compatibility with low voltage logic. Both core and I/O
supplies are required for proper operation.
1
2
20
19
18
17
16
15
14
13
12
11
V
V
DDL1
DDL2
GND
GND
1
IA
IB
2
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
ENCODE
ENCODE
3
V
V
V
V
V
V
OA
OB
IC
4
5
V
V
OC
OD
6
ID
7
CTRL
V
CTRL
1
2
REG
REG
8
V
DD1
DD2
9
V
V
DDC1
DDC2
10
GND
GND
1
2
Figure 3. ADuM3482
1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329. Other patents are pending.
Rev. A
Document Feedback
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Tel: 781.329.4700 ©2012–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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