Dual-Channel Digital Isolators
ADuM1200/ADuM1201
FEATURES
Narrow body SOIC 8-lead package
Low power operation
5 V operation
1.1 mA per channel maximum @ 0 Mbps to 2 Mbps
3.7 mA per channel maximum @ 10 Mbps
8.2 mA per channel maximum @ 25 Mbps
3 V operation
0.8 mA per channel maximum @ 0 Mbps to 2 Mbps
2.2 mA per channel maximum @ 10 Mbps
4.8 mA per channel maximum @ 25 Mbps
Bidirectional communication
3 V/5 V level translation
High temperature operation: 105°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
DIN EN 60747-5-2 (VDE 0884 Part 2): 2003-01
DIN EN 60950 (VDE 0805): 2001-12; DIN EN 60950: 2000
V
IORM
= 560 V peak
GENERAL DESCRIPTION
The ADuM120x are dual-channel digital isolators based on
Analog Devices’
iCoupler®
technology. Combining high speed
CMOS and monolithic transformer technology, these isolation
components provide outstanding performance characteristics
superior to alternatives such as optocoupler devices.
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
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.
The ADuM120x isolators provide two independent isolation
channels in a variety of channel configurations and data rates
(see the Ordering Guide). Both parts 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 ADuM120x 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
ADuM120x isolators have a patented refresh feature that
ensures dc correctness in the absence of input logic transitions
and during power-up/power-down conditions.
APPLICATIONS
Size-critical multichannel isolation
SPI® interface/data converter isolation
RS-232/RS-422/RS-485 transceiver isolation
Digital field bus isolation
FUNCTIONAL BLOCK DIAGRAMS
V
DD1 1
V
IA 2
V
IB 3
GND
1 4
ENCODE
ENCODE
DECODE
DECODE
8
V
DD2
V
OA
V
OB
04642-0-001
V
DD1 1
V
OA 2
V
IB 3
GND
1 4
DECODE
ENCODE
ENCODE
DECODE
8
V
DD2
V
IA
V
OB
GND
2
04642-0-002
7
7
6
6
5
GND
2
5
Figure 1. ADuM1200 Functional Block Diagram
Figure 2. ADuM1201 Functional Block Diagram
Rev. B
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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
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registered trademarks are the property of their respective owners.
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Tel: 781.329.4700
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
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