1 kV, Dual Channel Digital Isolators
ADuM7240/ADuM7241
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Narrow-body, RoHS-compliant, 8-lead SOIC
Safety and regulatory approvals
UL recognition (pending)
UL 1577: 1000 V rms for 1 minute
Low power operation
ADuM7240
1
2
3
4
8
7
6
5
V
V
V
V
DD1
DD2
OA
OB
ENCODE
ENCODE
DECODE
DECODE
V
IA
V
IB
GND
GND
2
5 V operation
1
2.4 mA per channel maximum at 0 Mbps to 1 Mbps
11.8 mA per channel maximum at 25 Mbps
3.3 V operation
Figure 1. ADuM7240
1.7 mA per channel maximum at 0 Mbps to 1 Mbps
8.2 mA per channel maximum at 25 Mbps
Bidirectional communication
Up to 25 Mbps data rate (NRZ)
3 V/5 V level translation
ADuM7241
1
2
3
4
8
7
6
5
V
V
V
V
DD1
DD2
DECODE
ENCODE
ENCODE
DECODE
V
OA
IA
V
IB
OB
High temperature operation: 105°C
High common-mode transient immunity: >15 kV/μs
GND
GND
2
1
Figure 2. ADuM7241
APPLICATIONS
General-purpose multichannel isolation
Data converter isolation
Industrial field bus isolation
GENERAL DESCRIPTION
The ADuM7240/ADuM72411 are dual channel digital isolators
based on the Analog Devices, Inc., iCoupler® technology.
Combining high speed CMOS and monolithic air core trans-
former technologies, these isolation components provide
outstanding performance characteristics superior to the alterna-
tives, such as optocoupler devices and other integrated couplers.
ADuM7240/ADuM7241 provide low pulse width distortion
(<5 ns for C grade). In addition, every model has an input glitch
filter to protect against extraneous noise disturbances.
The ADuM7240/ADuM7241 provide two independent
isolation channels and are available in two channel configura-
tions with 1 Mbps or 25 Mbps data rates (see the Ordering
Guide). All models operate with the supply voltage on either
side ranging from 3.0 V to 5.5 V, providing compatibility with
lower voltage systems as well as enabling voltage translation
functionality across the isolation barrier. The ADuM7240/
ADuM7241 also have an output default high logic state in the
absence of input power.
The ADuM7240/ADuM7241 dual 1 kV digital isolation devices
are packaged in a narrow-body 8-lead SOIC. The ADuM7240/
ADuM7241 offer a cost-effective option compared to 2.5 kV or
5 kV isolators where only functional isolation is needed.
Like other Analog Devices isolators, the ADuM7240/ADuM7241
offer very low power consumption, consuming one-tenth to
one-sixth the power of comparable isolators at data rates up to
25 Mbps. Despite the low power consumption, all models of the
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.
Rev. A
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