Dual-Channel Digital Isolators,
Enhanced System-Level ESD Reliability
ADuM3210/ADuM3211
GENERAL DESCRIPTION
FEATURES
Enhanced system-level ESD performance per IEC 61000-4-x
High temperature operation: 125°C
Default low output
Narrow body, RoHS-compliant, 8-lead SOIC
Low power operation
The ADuM321x1 are dual-channel, digital isolators based on
Analog Devices, Inc., iCoupler® technology. Combining high
speed CMOS and monolithic transformer technology, this
isolation component provides outstanding performance charac-
teristics superior to alternatives such as optocoupler devices.
5 V operation
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 charac-
teristics. The need for external drivers and other discrete
components is eliminated with these iCoupler products.
Furthermore, iCoupler devices consume one-tenth to one-
sixth the power of optocouplers at comparable signal data rates.
1.6 mA per channel maximum @ 0 Mbps to 2 Mbps
3.7 mA per channel maximum @ 10 Mbps
3 V operation
1.4 mA per channel maximum @ 0 Mbps to 2 Mbps
2.4 mA per channel maximum @ 10 Mbps
3 V/5 V level translation
High data rate: dc to 10 Mbps (NRZ)
Precise timing characteristics
3 ns maximum pulse-width distortion at 5 V operation
3 ns maximum channel-to-channel matching
High common-mode transient immunity: >25 kV/μs
Safety and regulatory approvals
The two channels of the ADuM321x are independent isolation
channels and are available in two channel configurations with
two different data rates up to 10 Mbps (see the Ordering Guide).
They 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 voltage translation functionality across
the isolation barrier. The ADuM321x isolators have a default
output low characteristic in comparison to the ADuM3200/
ADuM3201 models that have a default output high characteristic.
The ADuM321x are also available in 125°C temperature grade.
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
APPLICATIONS
Size-critical multichannel isolation
SPI interface/data converter isolation
RS-232/RS-422/RS-485 transceiver isolation
Digital field bus isolation
In comparison to the ADuM120x isolator, the ADuM321x
isolators contain various circuit and layout changes providing
increased capability relative to system-level IEC 61000-4-x
testing (ESD, burst, and surge). The precise capability in these
tests for either the ADuM120x or ADuM321x products is strongly
determined by the design and layout of the user’s board or module.
For more information, see the AN-793 Application Note,
ESD/Latch-Up Considerations with iCoupler Isolation Products.
Gate drive interfaces
FUNCTIONAL BLOCK DIAGRAMS
ADuM3210
ADuM3211
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
V
V
V
V
V
V
V
V
DD1
DD2
OA
OB
DD1
DD2
IA
ENCODE
ENCODE
DECODE
DECODE
ENCODE
ENCODE
DECODE
DECODE
V
V
V
OA
IA
V
IB
IB
OB
GND
GND
GND
GND
2
1
2
1
Figure 1. ADuM3210 Functional Block Diagram
Figure 2. ADuM3211 Functional Block Diagram
1 Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,239. Other patents pending.
Rev. C
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 ©2007–2009 Analog Devices, Inc. All rights reserved.
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