1 kV RMS Quad-Channel Digital Isolators
Data Sheet
ADuM7440/ADuM7441/ADuM7442
FEATURES GENERAL DESCRIPTION
1
Small, 16-lead QSOP The ADuM7440/ADuM7441/ADuM7442 are 4-channel digital
1000 V rms isolation rating
isolators based on the Analog Devices, Inc., iCoupler technology.
Safety and regulatory approvals
Combining high speed CMOS and monolithic air core transformer
UL recognition
technologies, these isolation components provide outstanding
UL 1577: 1000 V rms for 1 minute
performance characteristics superior to the alternatives, such as
Low power operation
optocoupler devices and other integrated couplers.
5 V operation
The ADuM7440/ADuM7441/ADuM7442 family of quad 1 kV
2.25 mA per channel maximum at 0 Mbps to 1 Mbps
digital isolation devices is packaged in a small 16-lead QSOP.
11.5 mA per channel maximum at 25 Mbps
While most 4-channel isolators come in 16-lead wide SOIC
3.3 V operation
packages, the ADuM7440/ADuM7441/ADuM7442 free almost
1.5 mA per channel maximum at 0 Mbps to 1 Mbps
70% of board space and yet can still withstand high isolation
8.25 mA per channel maximum at 25 Mbps
voltage and meet UL regulatory requirements. In addition to the
Bidirectional communication
space savings, the ADuM7440/ADuM7441/ADuM7442 offer a
Up to 25 Mbps data rate (NRZ)
lower price than 2.5 kV or 5 kV isolators where only functional
3 V/5 V level translation
isolation is needed.
High temperature operation: 105C
This family, like many Analog Devices isolators, offers very low
High common-mode transient immunity: >15 kV/s
power consumption, consuming one-tenth to one-sixth the
APPLICATIONS
power of comparable isolators at comparable data rates up to
General-purpose, multichannel isolation
25 Mbps. Despite the low power consumption, all models of the
SPI interface/data converter isolation
ADuM7440/ADuM7441/ADuM7442 provide low pulse width
RS-232/RS-422/RS-485 transceivers
distortion (<5 ns for C grade). In addition, every model has an
Industrial field bus isolation
input glitch filter to protect against extraneous noise disturbances.
The ADuM7440/ADuM7441/ADuM7442 isolators provide
four independent isolation channels in a variety of channel
configurations and two data rates (see the Ordering Guide) up to
25 Mbps. 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. All products also have an output
default high logic state in the absence of the input power.
1
Protected by U.S. Patents 5,952,849, 6,873,065 and 7,075,329. Other patents
pending.
FUNCTIONAL BLOCK DIAGRAMS
1 16 V 1 16 V V 1 16 V
V V
DD1A DD2A DD1A DD2A DD1A DD2A
ADuM7440 ADuM7441 ADuM7442
2 15 GND 2 15 GND GND 2 15 GND
GND GND
1 2 1 2 1 2
3 14 3 14 3 14
V ENCODE DECODE V V ENCODE DECODE V V ENCODE DECODE V
IA OA IA OA IA OA
V 4 13 V 4 13 V 4 13
ENCODE DECODE V IB ENCODE DECODE V IB ENCODE DECODE V
IB OB OB OB
5 12 5 12
V 5 ENCODE DECODE 12 V V ENCODE DECODE V V DECODE ENCODE V
IC OC IC OC OC IC
V 6 ENCODE DECODE 11 V V 6 DECODE ENCODE 11 V V 6 DECODE ENCODE 11 V
ID OD OD ID OD ID
V 7 10 V V 7 10 V V 7 10 V
DD1B DD2B DD1B DD2B DD1B DD2B
GND 8 9 GND GND 8 9 GND GND 8 9 GND
1 2 1 2
1 2
Figure 1. ADuM7440 Figure 2. ADuM7441 Figure 3. ADuM7442
Rev. D Document Feedback
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08340-001
08340-002
08340-003ADuM7440/ADuM7441/ADuM7442 Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1 Recommended Operating Conditions .......................................7
Applications ....................................................................................... 1 Absolute Maximum Ratings ............................................................8
General Description ......................................................................... 1 ESD Caution...................................................................................8
Functional Block Diagrams ............................................................. 1 Pin Configurations and Function Descriptions ............................9
Revision History ............................................................................... 2 Typical Performance Characteristics ........................................... 12
Specif icat ions ..................................................................................... 3 Applications Information .............................................................. 14
Electrical Characteristics5 V Operation................................ 3 PC Board Layout ........................................................................ 14
Electrical Characteristics3.3 V Operation ............................ 4 Propagation Delay-Related Parameters ................................... 14
Electrical CharacteristicsMixed 5 V/3.3 V Operation ........ 5 DC Correctness and Magnetic Field Immunity ........................... 14
Electrical CharacteristicsMixed 3.3 V/5 V Operation ........ 6 Power Consumption .................................................................. 15
Package Characteristics ............................................................... 7 Insulation Lifetime ..................................................................... 15
Regulatory Information ............................................................... 7 Outline Dimensions ....................................................................... 17
Insulation and Safety-Related Specifications ............................ 7 Ordering Guide .......................................................................... 17
REVISION HISTORY
10/15Rev. C to Rev. D 8/10Rev. 0 to Rev. A
Change to Features Section and General Description Section ........ 1 Change to Features ............................................................................ 1
Changes to Table 14 .......................................................................... 7 Changes to Table 1 ............................................................................. 3
Updated Outline Dimensions ....................................................... 17 Added Note 1, Table 1 ....................................................................... 3
Changes to Table 4 ............................................................................. 4
2/12Rev. B to Rev. C Added Note 1, Table 4 ....................................................................... 4
Created Hyperlink for Safety and Regulatory Approvals Changes to Table 7 ............................................................................. 5
Entry in Features Section ................................................................. 1 Added Note 1, Table 7 ....................................................................... 5
Change to PC Board Layout Section ............................................ 14 Changes to Table 10 .......................................................................... 6
Added Note 1, Table 10 ..................................................................... 6
2/11Rev. A to Rev. B Changes to Table 14 .......................................................................... 7
Changes to Figure 7 ........................................................................ 11
10/09Revision 0: Initial Version
Rev. D | Page 2 of 20