Small, 3.75 kV RMS Quad Digital Isolators
Data Sheet
ADuM3480/ADuM3481/ADuM3482
Informa
tion 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 registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2012–2014 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
Up to 25 Mbps data rate (NRZ)
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
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
V
IORM
= 560 V peak
APPLICATIONS
General-purpose multichannel isolation
SPI interface/data converter isolation
Industrial field bus isolation
GENERAL DESCRIPTION
The ADuM3480/ADuM3481/ADuM3482
1
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.
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. I f 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.
FUNCTIONAL BLOCK DIAGRAMS
REG REG
V
DDL1
V
DDL2
1
20
GND
1
GND
2
2 19
V
IA
V
OA
3 18
ENCODE DECODE
V
IB
V
OB
4 17
ENCODE DECODE
V
IC
V
OC
5 16
ENCODE DECODE
V
ID
V
OD
6 15
ENCODE DECODE
NC CTRL
2
7 14
V
DD1
V
DD2
8 13
V
DDC1
V
DDC2
9 12
GND
1
GND
2
10 11
ADuM3480
10459-001
Figure 1. ADuM3480
REG REG
V
DDL1
V
DDL2
1 20
GND
1
GND
2
2 19
V
IA
V
OA
3 18
ENCODE DECODE
V
IB
V
OB
4 17
ENCODE DECODE
V
IC
V
OC
5 16
ENCODE DECODE
V
OD
V
ID
6 15
DECODE ENCODE
CTRL
1
CTRL
2
7 14
V
DD1
V
DD2
8 13
V
DDC1
V
DDC2
9 12
GND
1
GND
2
10
11
ADuM3481
10459-002
Figure 2. ADuM3481
REG REG
V
DDL1
V
DDL2
1 20
GND
1
GND
2
2
19
V
IA
V
OA
3 18
ENCODE DECODE
V
IB
V
OB
4 17
ENCODE DECODE
V
OC
V
IC
5 16
DECODE ENCODE
V
OD
V
ID
6 15
DECODE ENCODE
CTRL
1
CTRL
2
7 14
V
DD1
V
DD2
8
13
V
DDC1
V
DDC2
9 12
GND
1
GND
2
10 11
ADuM3482
10459-003
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.
