3.0 kV rms,
Dual-Channel Digital Isolators
ADuM120N/ADuM121N
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
High common-mode transient immunity: 100 kV/µs typical
High robustness to radiated and conducted noise
Low propagation delay
13 ns maximum for 5 V operation
15 ns maximum for 1.8 V operation
150 Mbps minimum data rate
ADuM120N
1
2
3
4
8
7
6
5
V
V
V
V
DD1
DD2
OA
OB
ENCODE
ENCODE
DECODE
DECODE
V
V
IA
IB
GND
GND
2
1
Safety and regulatory approvals (pending)
UL recognition: 3000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A
VDE certificate of conformity
Figure 1. ADuM120N Functional Block Diagram
ADuM121N
1
2
3
4
8
7
6
5
V
V
V
V
DD1
DD2
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
DECODE
ENCODE
ENCODE
DECODE
V
OA
IA
V
IORM = 565 V peak
V
IB
OB
CQC certification per GB4943.1-2011
Backward compatibility
GND
GND
1
2
ADuM120N0 pin-compatible with ADuM1285
ADuM120N1 pin-compatible with ADuM1280 and
ADuM1200
Figure 2. ADuM121N Functional Block Diagram
ADuM121N0 pin-compatible with ADuM1286
ADuM121N1 pin-compatible with ADuM1281 and
ADuM1201
Low dynamic power consumption
1.8 V to 5 V level translation
High temperature operation: 125°C
Failsafe high or low options
8-lead, RoHS-compliant, SOIC package
Qualified for automotive applications
APPLICATIONS
General-purpose multichannel isolation
Industrial field bus isolation
providing compatibility with lower voltage systems as well as
enabling voltage translation functionality across the isolation
barrier.
GENERAL DESCRIPTION
The ADuM120N/ADuM121N1 are dual-channel digital isolators
based on Analog Devices, Inc., iCoupler® technology. Combining
high speed, complementary metal-oxide semiconductor (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. The maximum propagation delay is 13 ns
with a pulse width distortion of less than 3 ns at 5 V operation.
Channel matching is tight at 3.0 ns maximum.
Unlike other optocoupler alternatives, dc correctness is ensured in
the absence of input logic transitions. Two different fail-safe options
are available in which the outputs transition to a predetermined
state when the input power supply is not applied or the inputs
are disabled.
The ADuM120N0 is pin-compatible with the ADuM1285, and
the ADuM120N1 is pin-compatible with the ADuM1280 and
the ADuM1200. The ADuM121N0 is pin-compatible with
ADuM1286, and the ADuM121N0 is pin-compatible with the
ADuM1281 and the ADuM1201.
The ADuM120N/ADuM121N data channels are independent and
are available in a variety of configurations with a withstand voltage
rating of 3 kV rms (see the Ordering Guide). The devices operate
with the supply voltage on either side ranging from 1.8 V to 5 V,
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
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
rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.
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Tel: 781.329.4700
Technical Support
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www.analog.com
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