Dual-Channel Digital Isolators
ADuM1200/ADuM1201
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 the power of optocouplers at
comparable signal data rates.
Data Sheet
FEATURES
Narrow body, RoHS-compliant, SOIC 8-lead package
Low power operation
5 V operation
1.1 mA per channel maximum at 0 Mbps to 2 Mbps
3.7 mA per channel maximum at 10 Mbps
8.2 mA per channel maximum at 25 Mbps
3 V operation
0.8 mA per channel maximum at 0 Mbps to 2 Mbps
2.2 mA per channel maximum at 10 Mbps
4.8 mA per channel maximum at 25 Mbps
Bidirectional communication
The ADuM1200/ADuM1201 isolators provide two independent
isolation channels in a variety of channel configurations and
data rates (see the Ordering Guide). Both devices 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 ADuM1200/ADuM1201 provide low
pulse width distortion (<3 ns for CR grade) and tight channel-
to-channel matching (<3 ns for CR grade). Unlike other
optocoupler alternatives, the ADuM1200/ADuM1201 isolators
have a patented refresh feature that ensures dc correctness in
the absence of input logic transitions and during power-
up/power-down conditions.
3 V/5 V level translation
High temperature operation: 125°C
High data rate: dc to 25 Mbps (NRZ)
Precise timing characteristics
3 ns maximum pulse width distortion
3 ns maximum channel-to-channel matching
High common-mode transient immunity: >25 kV/μs
Safety and regulatory approvals
UL recognition
2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A
VDE Certificate of Conformity
The ADuM1200W and ADuM1201W are automotive grade
versions qualified for 125°C operation. See the Automotive
Products section for more information.
DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
V
IORM = 560 V peak
FUNCTIONAL BLOCK DIAGRAMS
Qualified for automotive applications
1
2
3
4
8
7
6
5
V
V
V
V
DD1
DD2
OA
OB
APPLICATIONS
ENCODE
ENCODE
DECODE
DECODE
V
V
IA
IB
Size-critical multichannel isolation
SPI interface/data converter isolation
RS-232/RS-422/RS-485 transceiver isolation
Digital field bus isolation
GND
GND
2
1
Figure 1. ADuM1200 Functional Block Diagram
Hybrid electric vehicles, battery monitor, and motor drive
GENERAL DESCRIPTION
1
2
3
4
8
7
6
5
V
V
V
V
DD1
DD2
The ADuM1200/ADuM12011 are dual-channel digital isolators
based on the Analog Devices, Inc., iCoupler® technology.
Combining high speed CMOS and monolithic transformer
technologies, these isolation components provide outstanding
performance characteristics superior to alternatives, such as
optocouplers.
DECODE
ENCODE
ENCODE
DECODE
V
OA
IA
V
IB
OB
GND
GND
2
1
Figure 2. ADuM1201 Functional Block Diagram
By avoiding the use of LEDs and photodiodes, iCoupler devices
remove the design difficulties commonly associated with opto-
couplers.
1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329.
Rev. K
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