1 kV RMS Six-Channel Digital Isolators
Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Small 20-lead QSOP
1000 V rms isolation rating
Safety and regulatory approvals (pending):
UL recognition (pending)
1000 V rms for 1 minute per UL 1577
Low power operation
1
20
19
18
17
16
15
14
13
12
11
V
V
DD2A
DD1A
ADuM7640
2
GND
V
GND
1
2
ENCODE
ENCODE
ENCODE
ENCODE
DECODE
DECODE
DECODE
DECODE
3
V
IA
IB
IC
ID
OA
4
V
V
V
V
OB
5
V
OC
6
V
OD
7
V
V
V
V
DD1B
DD2B
OE
3.3 V operation
ENCODE
ENCODE
DECODE
DECODE
8
V
IE
1.6 mA per channel maximum at 0 Mbps to 1 Mbps
7.8 mA per channel maximum at 25 Mbps
5 V operation
9
V
IF
OF
10
GND
GND
1
2
2.2 mA per channel maximum at 0 Mbps to 1 Mbps
11.2 mA per channel maximum at 25 Mbps
Bidirectional communication
Up to 25 Mbps data rate (NRZ)
3 V/5 V level translation
Figure 1. ADuM7640
1
2
20
19
18
17
16
15
14
13
12
11
V
V
DD2A
DD1A
ADuM7641
GND
GND
2
1
IA
IB
IC
ID
ENCODE
DECODE
DECODE
DECODE
DECODE
3
V
V
V
V
V
V
V
V
V
V
V
OA
OB
OC
OD
ENCODE
ENCODE
ENCODE
4
High temperature operation: 105°C
High common-mode transient immunity: >15 kV/μs
5
6
7
V
DD1B
DD2B
IE
APPLICATIONS
DECODE
ENCODE
ENCODE
DECODE
8
V
OE
General-purpose, multichannel isolation
SPI interface/data converter isolation
RS-232/RS-422/RS-485 transceivers
Industrial field bus isolation
9
V
IF
OF
10
GND
GND
1
2
Figure 2. ADuM7641
1
2
20
19
18
17
16
15
14
13
12
11
V
V
DD2A
DD1A
GENERAL DESCRIPTION
ADuM7642
GND
GND
2
1
IA
IB
IC
The ADuM7640/ADuM7641/ADuM7642/ADuM76431 are
6-channel digital isolators based on the Analog Devices, Inc.,
iCoupler® technology. These 1 kV digital isolation devices are
packaged in a small 20-lead QSOP. They offer space savings and
a lower price than 2.5 kV or 5 kV isolation solutions when only
functional isolation is needed.
ENCODE
DECODE
DECODE
DECODE
ENCODE
3
V
V
V
V
V
V
V
V
V
V
OA
OB
OC
ID
ENCODE
ENCODE
DECODE
4
5
6
V
OD
7
V
DD1B
DD2B
IE
DECODE
ENCODE
ENCODE
DECODE
8
V
OE
9
V
IF
OF
This family, like many Analog Devices isolators, offers very low
power consumption, using one-tenth to one-sixth the power of
other digital isolators, with the supply voltage on either side
ranging from 3.0 V to 5.5 V. Despite their low power consumption,
the ADuM7640/ADuM7641/ADuM7642/ADuM7643 provide
low pulse width distortion (< 6 ns for C grade) and a channel-
by-channel glitch filter to protect the device against extraneous
noise disturbances. Four channel direction combinations are
available with a maximum data rate of 1 Mbps or 25 Mbps. All
products have a default output high logic state in the absence of
input power.
10
GND
GND
1
2
Figure 3. ADuM7642
1
2
20
19
18
17
16
15
14
13
12
11
V
V
DD2A
DD1A
ADuM7643
GND
GND
2
1
IA
IB
ENCODE
DECODE
DECODE
ENCODE
ENCODE
3
V
V
V
V
V
V
V
V
V
OA
OB
IC
ENCODE
DECODE
DECODE
4
5
V
OC
OD
6
V
ID
7
V
DD1B
DD2B
IE
DECODE
ENCODE
ENCODE
DECODE
8
V
OE
9
V
IF
OF
10
GND
GND
2
1
Figure 4. ADuM7643
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.
Rev. 0
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
rights of third parties that may result from its 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 and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2012 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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