ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
1 kV RMS Six-Channel Digital Isolators
ADuM7640/ADuM7641/ADuM7642/ADuM7643
FEATURES
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
3.3 V operation
1.6 mA per channel maximum at 0 Mbps to 1 Mbps
7.8 mA per channel maximum at 25 Mbps
5 V operation
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
High temperature operation: 105°C
High common-mode transient immunity: >15 kV/μs
APPLICATIONS
General-purpose, multichannel isolation
SPI interface/data converter isolation
RS-232/RS-422/RS-485 transceivers
Industrial field bus isolation
www.DataSheet.net/
FUNCTIONAL BLOCK DIAGRAMS
VDD1A 1 ADuM7640
GND1 2
VIA 3
ENCODE
DECODE
VIB 4
ENCODE
DECODE
VIC 5
ENCODE
DECODE
VID 6
ENCODE
DECODE
VDD1B 7
VIE 8
ENCODE
DECODE
VIF 9
ENCODE
DECODE
GND1 10
Figure 1. ADuM7640
20 VDD2A
19 GND2
18 VOA
17 VOB
16 VOC
15 VOD
14 VDD2B
13 VOE
12 VOF
11 GND2
VDD1A 1 ADuM7641
GND1 2
VIA 3
ENCODE
VIB 4
ENCODE
VIC 5
ENCODE
VID 6
ENCODE
VDD1B 7
VOE 8
DECODE
VIF 9
ENCODE
GND1 10
DECODE
DECODE
DECODE
DECODE
ENCODE
DECODE
Figure 2. ADuM7641
20 VDD2A
19 GND2
18 VOA
17 VOB
16 VOC
15 VOD
14 VDD2B
13 VIE
12 VOF
11 GND2
GENERAL DESCRIPTION
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.
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.
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.
VDD1A 1 ADuM7642
GND1 2
VIA 3
ENCODE
DECODE
VIB 4
ENCODE
DECODE
VIC 5
ENCODE
DECODE
VOD 6
DECODE
ENCODE
VDD1B 7
VOE 8
DECODE
ENCODE
VIF 9
ENCODE
DECODE
GND1 10
Figure 3. ADuM7642
20 VDD2A
19 GND2
18 VOA
17 VOB
16 VOC
15 VID
14 VDD2B
13 VIE
12 VOF
11 GND2
VDD1A 1 ADuM7643
GND1 2
VIA 3
ENCODE
DECODE
VIB 4
ENCODE
DECODE
VOC 5
DECODE
ENCODE
VOD 6
DECODE
ENCODE
VDD1B 7
VOE 8
DECODE
ENCODE
VIF 9
ENCODE
DECODE
GND1 10
Figure 4. ADuM7643
20 VDD2A
19 GND2
18 VOA
17 VOB
16 VIC
15 VID
14 VDD2B
13 VIE
12 VOF
11 GND2
Rev. 0
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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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagrams............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—5 V Operation................................ 3
Electrical Characteristics—3.3 V Operation ............................ 5
Electrical Characteristics—Mixed 5 V/3.3 V Operation ........ 7
Electrical Characteristics—Mixed 3.3 V/5 V Operation ........ 8
Package Characteristics ............................................................... 9
Regulatory Information............................................................... 9
Insulation and Safety Related Specifications ............................ 9
Recommended Operating Conditions ...................................... 9
REVISION HISTORY
9/12—Revision 0: Initial Version
Absolute Maximum Ratings ......................................................... 10
ESD Caution................................................................................ 10
Pin Configurations and Function Descriptions ......................... 11
Typical Performance Characteristics ........................................... 15
Applications Information .............................................................. 17
Printed Circuit Board Layout ................................................... 17
Propagation Delay-Related Parameters................................... 17
DC Correctness ............................................................................ 17
Magnetic Field Immunity............................................................. 18
Power Consumption .................................................................. 19
Insulation Lifetime ..................................................................... 19
Outline Dimensions ....................................................................... 20
Ordering Guide .......................................................................... 20
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Rev. 0 | Page 2 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—5 V OPERATION
All typical specifications are at TA = 25°C, VDD1 = VDD2 = 5 V. Minimum/maximum specifications apply over the entire recommended operation
range of 4.5 V ≤ VDD1 ≤ 5.5 V, 4.5 V ≤ VDD2 ≤ 5.5 V, and −40°C ≤ TA ≤ +105°C, unless otherwise noted. Switching specifications are tested
with CL = 15 pF and CMOS signal levels, unless otherwise noted.
Table 1.
Parameter
SWITCHING SPECIFICATIONS
Pulse Width
Data Rate
Propagation Delay
Pulse Width Distortion
Change vs. Temperature
Propagation Delay Skew1
Channel Matching
Codirectional2
Opposing Directional3
Jitter
Symbol
PW
tPHL, tPLH
PWD
tPSK
tPSKCD
tPSKOD
Min
250
A Grade
Typ Max
1
75
25
5
20
25
30
2
C Grade
Min Typ Max Unit Test Conditions/Comments
40 ns Within PWD limit
25 Mbps Within PWD limit
28 40 50 ns
50% input to 50% output
2 6 ns |tPLH − tPHL|
3 ps/°C
14 ns
6 12 ns
7 12 ns
2 ns
1 tPSK is the magnitude of the worst-case difference in tPHL or tPLH that is measured between units at the same operating temperature, supply voltages, and output load
within the recommended operating conditions.
2 Codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on the same side of the isolation barrier.
3 Opposing directional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on opposite sides of the
isolation barrier.
Table 2.
Parameter
SUPPLY CURRENT
ADuM7640
ADuM7641
ADuM7642
ADuM7643
Symbol
1 Mbps—A and C Grades www.DataSheet.net/
25 Mbps—C Grade
Min Typ Max Min Typ Max
IDD1
5.7 7.0
44 54
IDD2
4.4 5.9
11 13
IDD1
5.5 6.8
38 46
IDD2
4.6 5.7
15 19
IDD1
5.2 6.3
31 38
IDD2
4.8 6.0
19 24
IDD1
4.8 6.0
24 30
IDD2
5.0 6.3
22 29
Unit
mA
mA
mA
mA
mA
mA
mA
mA
Test Conditions/Comments
No load
Rev. 0 | Page 3 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
Table 3.
Parameter
DC SPECIFICATIONS
Input Voltage Threshold
Logic High
Logic Low
Output Voltages
Logic High
Logic Low
Input Current per Channel
Supply Current per Channel
Quiescent Supply Current
Input
Output
Dynamic Supply Current
Input
Output
AC SPECIFICATIONS
Output Rise/Fall Time
Common-Mode Transient Immunity1
Refresh Rate
Symbol Min
Typ
VIH 0.7 VDDx
VIL
VOH VDDx − 0.1 5.0
VDDx − 0.4 4.8
VOL 0.0
0.2
II −10 +0.01
IDDI (Q)
IDDO (Q)
IDDI (D)
IDDO (D)
tR/tF
|CM|
fr
15
0.95
0.73
0.26
0.04
2.0
25
600
Max Unit Test Conditions/Comments
0.3 VDDx
0.1
0.4
+10
V
V
V
V
V
V
µA
IOx = −20 µA, VIx = VIxH
IOx = −4 mA, VIx = VIxH
IOx = 20 µA, VIx = VIxL
IOx = 4 mA, VIx = VIxL
0 V ≤ VIx ≤ VDDx
1.16 mA
0.98 mA
mA/Mbps
mA/Mbps
ns
kV/µs
kHz
10% to 90%
VIx = VDDx, VCM = 1000 V, transient
magnitude = 800 V
DC data inputs
1 |CM| is the maximum common-mode voltage slew rate that can be sustained while maintaining VOL < 0.8 × VDDLx or VOH > 0.7 × VDDIx. The common-mode voltage slew
rates apply to both rising and falling common-mode voltage edges.
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
ELECTRICAL CHARACTERISTICS—3.3 V OPERATION
All typical specifications are at TA = 25°C, VDD1 = VDD2 = 3.3 V. Minimum/maximum specifications apply over the entire recommended
operation range of 3.0 V ≤ VDD1 ≤ 3.6 V, 3.0 V ≤ VDD2 ≤ 3.6 V, and −40°C ≤ TA ≤ +105°C, unless otherwise noted. Switching specifications
are tested with CL = 15 pF and CMOS signal levels, unless otherwise noted.
Table 4.
Parameter
SWITCHING SPECIFICATIONS
Pulse Width
Data Rate
Propagation Delay
Pulse Width Distortion
Change vs. Temperature
Propagation Delay Skew1
Channel Matching
Codirectional2
Opposing Directional3
Jitter
Symbol
PW
tPHL, tPLH
PWD
tPSK
tPSKCD
tPSKOD
Min
250
A Grade
Typ Max
1
85
25
5
20
25
30
2
C Grade
Min Typ Max
Unit
Test Conditions/Comments
40 ns Within PWD limit
25 Mbps Within PWD limit
33 49 66 ns
50% input to 50% output
2 6 ns |tPLH − tPHL|
3 ps/°C
14 ns
6 12 ns
6 15 ns
2 ns
1 tPSK is the magnitude of the worst-case difference in tPHL or tPLH that is measured between units at the same operating temperature, supply voltages, and output load
within the recommended operating conditions.
2 Codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on the same side of the isolation barrier.
3 Opposing directional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on opposite sides of the
isolation barrier.
Table 5.
Parameter
SUPPLY CURRENT
ADuM7640
ADuM7641
ADuM7642
Symbol
IDD1
IDD2
IDD1
IDD2
IDD1
IDD2
1 Mbps—A and C Grades 25 Mbps—C Grade
Min Typ Max Min Typ Max
4.1
5.2
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3.3 4.3
3.9 4.9
3.4 4.2
3.7 4.7
3.5 4.4
32 38
7.2 8.7
27 33
11 13
23 27
14 16
Unit
mA
mA
mA
mA
mA
mA
Test Conditions/Comments
No load
ADuM7643
IDD1
3.5 4.4
18 21 mA
IDD2
3.6 4.5
16 20 mA
Rev. 0 | Page 5 of 20
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ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
Table 6.
Parameter
DC SPECIFICATIONS
Input Voltage Threshold
Logic High
Logic Low
Output Voltages
Logic High
Logic Low
Input Current per Channel
Supply Current per Channel
Quiescent Supply Current
Input
Output
Dynamic Supply Current
Input
Output
AC SPECIFICATIONS
Output Rise/Fall Time
Common-Mode Transient Immunity1
Refresh Rate
Symbol Min
Typ
VIH 0.7 VDDx
VIL
VOH VDDx − 0.2 3.3
VDDx − 0.5 3.1
VOL 0.0
0.2
II −10 +0.01
IDDI (Q)
IDDO (Q)
IDDI (D)
IDDO (D)
tR/tF
|CM|
fr
15
0.68
0.55
0.19
0.03
2.8
20
550
Max Unit
Test Conditions/Comments
0.3 VDDx
0.1
0.4
+10
V
V
V
V
V
V
µA
IOx = −20 µA, VIx = VIxH
IOx = −4 mA, VIx = VIxH
IOx = 20 µA, VIx = VIxL
IOx = 4 mA, VIx = VIxL
0 V ≤ VIx ≤ VDDx
0.87 mA
0.72 mA
mA/Mbps
mA/Mbps
ns
kV/µs
kHz
10% to 90%
VIx = VDDx, VCM = 1000 V,
transient magnitude = 800 V
DC data inputs
1 |CM| is the maximum common-mode voltage slew rate that can be sustained while maintaining VOL < 0.8 VDDLx or VOH > 0.7 × VDDIx. The common-mode voltage slew
rates apply to both rising and falling common-mode voltage edges.
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Rev. 0 | Page 6 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
ELECTRICAL CHARACTERISTICS—MIXED 5 V/3.3 V OPERATION
All typical specifications are at TA = 25°C, VDD1 = 5 V, VDD2 = 3.3 V. Minimum/maximum specifications apply over the entire recom-
mended operation range of 4.5 V ≤ VDD1 ≤ 5.5 V, 3.0 V ≤ VDD2 ≤ 3.6 V, and −40°C ≤ TA ≤ +105°C, unless otherwise noted. Switching
specifications are tested with CL = 15 pF and CMOS signal levels, unless otherwise noted.
Table 7.
Parameter
Symbol
A Grade
Min Typ Max
C Grade
Min Typ Max
Unit Test Conditions/Comments
SWITCHING SPECIFICATIONS
Pulse Width
PW 250
40
ns Within PWD limit
Data Rate
1 25 Mbps Within PWD limit
Propagation Delay
Pulse Width Distortion
tPHL, tPLH
PWD
80 30 42 58 ns 50% input to 50% output
25 2 6 ns |tPLH − tPHL|
Change vs. Temperature
5 3 ps/°C
Propagation Delay Skew1
tPSK
20 14 ns
Channel Matching
Codirectional2
tPSKCD
25 5 15 ns
Opposing Directional3
Jitter
tPSKOD
30
2
8 15 ns
2 ns
1 tPSK is the magnitude of the worst-case difference in tPHL or tPLH that is measured between units at the same operating temperature, supply voltages, and output load
within the recommended operating conditions.
2 Codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on the same side of the isolation barrier.
3 Opposing directional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on opposite sides of the
isolation barrier.
Table 8.
1 Mbps—A, C Grades
25 Mbps—C Grade
Parameter
Symbol Min Typ Max Min Typ Max Unit Test Conditions/Comments
SUPPLY CURRENT
No load
ADuM7640
IDD1
5.7
7.0
www.DataSheet.net/
44 54 mA
IDD2
3.3 4.1
7.5 8.7 mA
ADuM7641
IDD1
5.4 6.8
38 46 mA
IDD2
3.4 4.0
11 13 mA
ADuM7642
IDD1
5.1 6.3
31 38 mA
IDD2
3.5 4.3
14 16 mA
ADuM7643
IDD1
4.8 6.0
24 30 mA
IDD2
3.6 4.3
16 20 mA
Table 9.
Parameter
DC SPECIFICATIONS
Input Voltage Threshold
Logic High
Logic Low
Output Voltages
Logic High
Logic Low
Input Current per Channel
AC SPECIFICATIONS
Output Rise/Fall Time
Common-Mode Transient Immunity1
Refresh Rate
Symbol Min Typ Max Unit Test Conditions/Comments
VIH
VIL
VOH
VOL
II
tR/tF
|CM|
fr
0.7 VDDx
VDDx − 0.1
VDDx − 0.5
−10
15
VDDx
VDDx − 0.2
0.0
0.2
+0.01
2.5
20
600
0.3 VDDx
0.1
0.4
+10
V
V
V IOx = −20 µA, VIx = VIxH
V IOx = −4 mA, VIx = VIxH
V IOx = 20 µA, VIx = VIxL
V IOx = 4 mA, VIx = VIxL
µA 0 V ≤ VIx ≤ VDDx
ns
kV/µs
kHz
10% to 90%
VIx = VDDx, VCM = 1000 V,
transient magnitude = 800 V
DC data inputs
1 |CM| is the maximum common-mode voltage slew rate that can be sustained while maintaining VOL < 0.8 VDDLx or VOH > 0.7 × VDDIx. The common-mode voltage slew
rates apply to both rising and falling common-mode voltage edges.
Rev. 0 | Page 7 of 20
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ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
ELECTRICAL CHARACTERISTICS—MIXED 3.3 V/5 V OPERATION
All typical specifications are at TA = 25°C, VDD1 = 3.3 V, VDD2 = 5 V. Minimum/maximum specifications apply over the entire recom-
mended operation range of 3.0 V ≤ VDD1 ≤ 3.6 V, 4.5 V ≤ VDD2 ≤ 5.5 V, and −40°C ≤ TA ≤ +105°C, unless otherwise noted. Switching
specifications are tested with CL = 15 pF and CMOS signal levels, unless otherwise noted.
Table 10.
A Grade
C Grade
Parameter
Symbol Min Typ Max Min Typ Max Unit Test Conditions/Comments
SWITCHING SPECIFICATIONS
Pulse Width
PW 250
40
ns Within PWD limit
Data Rate
1 25 Mbps Within PWD limit
Propagation Delay
tPHL, tPLH
80 29 46 60 ns 50% input to 50% output
Pulse Width Distortion
Change vs. Temperature
PWD
25
5
2 6 ns |tPLH − tPHL|
3 ps/°C
Propagation Delay Skew1
Channel Matching
tPSK
20 14 ns
Codirectional2
tPSKCD
25 6 13 ns
Opposing Directional3
tPSKOD
30 9 18 ns
Jitter
2 2 ns
1 tPSK is the magnitude of the worst-case difference in tPHL or tPLH that is measured between units at the same operating temperature, supply voltages, and output load
within the recommended operating conditions.
2 Codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on the same side of the isolation barrier.
3 Opposing directional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on opposite sides of the
isolation barrier.
Table 11.
1 Mbps—A, C Grades
25 Mbps—C Grade
Parameter
Symbol Min Typ Max Min Typ Max Unit Test Conditions/Comments
SUPPLY CURRENT
No load
ADuM7640
ADuM7641
ADuM7642
ADuM7643
IDD1
4.1 4.9
www.DataSheet.net/
32
38 mA
IDD2
4.5 5.9
11 13 mA
IDD1
3.9 4.7
27 33 mA
IDD2
4.6 5.7
15 19 mA
IDD1
3.7 4.4
23 27 mA
IDD2
4.8 6.0
19 24 mA
IDD1
3.5 4.2
18 21 mA
IDD2
5.0 6.2
22 29 mA
Table 12.
Parameter
Symbol Min Typ Max Unit Test Conditions/Comments
DC SPECIFICATIONS
Input Voltage Threshold
Logic High
Logic Low
Output Voltages
VIH 0.7 VDDx
VIL
0.3 VDDx
V
V
Logic High
Logic Low
Input Current per Channel
AC SPECIFICATIONS
VOH
VDDx − 0.1
VDDx
VDDx − 0.5
VDDx − 0.2
VOL 0.0 0.1
0.2 0.4
II
−10
+0.01
+10
V IOx = −20 µA, VIx = VIxH
V IOx = −4 mA, VIx = VIxH
V IOx = 20 µA, VIx = VIxL
V IOx = 4 mA, VIx = VIxL
µA 0 V ≤ VIx ≤ VDDx
Output Rise/Fall Time
Common-Mode Transient Immunity1
tR/tF
|CM|
15
2.5
20
ns
kV/µs
10% to 90%
VIx = VDDx, VCM = 1000 V,
transient magnitude = 800 V
Refresh Rate
fr 550 kHz DC data inputs
1 |CM| is the maximum common-mode voltage slew rate that can be sustained while maintaining VOL < 0.8 VDDLx or VOH > 0.7 × VDDIx. The common-mode voltage
slew rates apply to both rising and falling common-mode voltage edges.
Rev. 0 | Page 8 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
PACKAGE CHARACTERISTICS
Table 13.
Parameter
Symbol Min Typ Max Unit
Resistance (Input to Output)1
RI-O
1013
Capacitance (Input to Output)1
CI-O
2
pF
Input Capacitance2
CI 4.0 pF
IC Junction-to-Ambient Thermal Resistance θJA
76
°C/W
Test Conditions/Comments
f = 1 MHz
Thermocouple located at
center of package underside
1 The device is considered a 2-terminal device: Pin 1 through Pin 10 are shorted together, and Pin 11 through Pin 20 are shorted together.
2 Input capacitance is from any input data pin to ground.
REGULATORY INFORMATION
The ADuM7640/ADuM7641/ADuM7642/ADuM7643 are approved by the organizations listed in Table 14. See Table 18 and the
Insulation Lifetime section for recommended maximum working voltages for specific cross-isolation waveforms and insulation levels.
Table 14.
UL (Pending)
Recognized Under UL 1577 Component Recognition Program1
Single Protection,1000 V rms Isolation Voltage
File E274400
1 In accordance with UL 1577, each ADuM7640/ADuM7641/ADuM7642/ADuM7643 is proof tested by applying an insulation test voltage ≥ 1200 V rms for 1 sec (current
leakage detection limit = 5 µA).
INSULATION AND SAFETY RELATED SPECIFICATIONS
Table 15.
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Symbol
L(I01)
Value
www.DataSheet.net/
1000
3.8
Minimum External Tracking (Creepage)
L(I02)
2.8
Minimum Internal Gap (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Isolation Group
CTI
2.6
>400
II
Unit
V rms
mm min
mm min
μm min
V
Test Conditions/Comments
1 minute duration
Measured from input terminals to output
terminals, shortest distance through air
Measured from input terminals to output
terminals, shortest distance path along body
Insulation distance through insulation
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
350
300
250
200
150
100
50
0
0 50 100 150 200
CASE TEMPERATURE (°C)
Figure 5. Thermal Derating Curve, Dependence of Safety-Limiting Values on
Case Temperature per DIN V VDE V 0884-10
RECOMMENDED OPERATING CONDITIONS
Table 16.
Parameter
Operating Temperature
Supply Voltages1
Input Signal Rise and Fall
Times
Symbol
TA
VDD1, VDD2
Min
−40
3.0
Max
+105
5.5
1.0
Unit
°C
V
ms
1 All voltages are relative to their respective grounds. See the DC Correctness
section for information about immunity to external magnetic fields.
Rev. 0 | Page 9 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 17.
Parameter
Rating
Storage Temperature (TST) Range
Ambient Operating Temperature (TA)
Supply Voltages (VDD1, VDD2)
Input Voltages (VIA, VIB, VIC, VID, VIE, VIF)1, 2
Output Voltages (VOA, VOB, VOC, VOD, VIE,
VIF)1, 2
Average Output Current per Pin3
Side 1 (IO1)
Side 2 (IO2)
Common-Mode Transients3
−65°C to +150°C
−40°C to +105°C
−0.5 V to +7.0 V
−0.5 V to VDDI + 0.5 V
−0.5 V to VDDO + 0.5 V
−10 mA to +10 mA
−10 mA to +10 mA
−100 kV/µs to +100 kV/µs
1 VDDI and VDDO refer to the supply voltages on the input and output sides of a
given channel, respectively. See the Printed Circuit Board Layout section.
2 See Figure 5 for maximum rated current values for various temperatures.
3 Refers to common-mode transients across the insulation barrier. Common-
mode transients exceeding the absolute maximum ratings may cause
latch-up or permanent damage.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress rating
only; functional operation of the device at these or any other
conditions above those indicated in the operational section of
this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
ESD CAUTION
Table 18. Maximum Continuous Working Voltage1
Parameter
Max Unit
Constraint
AC Voltage, Bipolar Waveform
420
V peak
50-year minimum lifetime
AC Voltage, Unipolar Waveform
Basic Insulation
420
V peak
50-year minimum lifetime
DC Voltage
Basic Insulation
420
V peak
50-year minimum lifetime
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1 Refers to continuous voltage magnitude imposed across the isolation barrier. See the Insulation Lifetime section for more information.
Table 19. Truth Table (Positive Logic)
VIx Input1
VDDI State2
VDDO State3
H
Powered
Powered
L
Powered
Powered
X Unpowered Powered
X
Powered
Unpowered
VOxOutput1
H
L
H
Z
Description
Normal operation; data is high.
Normal operation; data is low.
Input unpowered. Output pins are in the default high state. Outputs
return to input state within 1.6 µs of VDDI power restoration. See the pin
function descriptions (Table 20 through Table 23) for more information.
Output unpowered. Output pins are in high impedance state. Outputs
return to input state within 1.6 µs of VDDO power restoration. See the pin
function descriptions (Table 20 through Table 23Table 22) for more
information.
1 VIx and VOx refer to the input and output signals of a given channel (A, B, C, D, E or F).
2 VDDI refers to the supply voltage on the input side of a given channel (A, B, C, D, E or F).
3 VDDO refers to the supply voltage on the output side of a given channel (A, B, C, D, E or F).
Rev. 0 | Page 10 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
VDD1A 1
GND1* 2
VIA 3
VIB 4
VIC 5
VID 6
VDD1B 7
VIE 8
VIF 9
GND1* 10
ADuM7640
TOP VIEW
(Not to Scale)
20 VDD2A
19 GND2*
18 VOA
17 VOB
16 VOC
15 VOD
14 VDD2B
13 VOE
12 VOF
11 GND2*
*PIN 2 AND PIN 10 ARE INTERNALLY CONNECTED.
CONNECTING BOTH PINS TO PCB SIDE 1 GROUND
IS RECOMMENDED. PIN 11 AND PIN 19 ARE
INTERNALLY CONNECTED. CONNECTING BOTH
PINS TO PCB SIDE 2 GROUND IS RECOMMENDED.
Figure 6. ADuM7640 Pin Configuration
Table 20. ADuM7640 Pin Function Descriptions
Pin No. Mnemonic Description
1
VDD1A
Supply Voltage A for Isolator Side 1 (3.0 V to 5.5 V). Pin 1 must be connected externally to Pin 7. Connect a 0.01 µF to
0.1 µF between VDD1A (Pin 1) and GND1 (Pin 2).
2
GND1
Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the
PCB ground plane is recommended.
3 VIA
Logic Input A.
4 VIB
Logic Input B.
5 VIC
Logic Input C.
6 VID
Logic Input D.
7 VDD1B Supply Voltage B for Isolator Side 1 (3.0 V to 5.5 V). Pin 7 must be connected externally to Pin 1. Connect a 0.01 µF to
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0.1 µF between VDD1B (Pin 7) and GND1 (Pin 10).
8 VIE
Logic Input E.
9 VIF
Logic Input F.
10 GND1 Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
11 GND2 Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
12 VOF
Logic Output F.
13 VOE
Logic Output E.
14 VDD2B
Supply Voltage B for Isolator Side 2 (3.0 V to 5.5 V). Pin 14 must be connected externally to Pin 20. Connect a 0.01 µF
to 0.1 µF between VDD2B (Pin 14) and GND2 (Pin 11).
15 VOD
Logic Output D.
16 VOC
Logic Output C.
17 VOB
Logic Output B.
18 VOA
Logic Output A.
19 GND2 Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
20 VDD2A
Supply Voltage A for Isolator Side 2 (3.0 V to 5.5 V). Pin 20 must be connected externally to Pin 14. Connect a 0.01 µF
to 0.1 µF between VDD2A (Pin 20) and GND2 (Pin 19).
Reference the AN-1109 Application Note for specific layout guidelines.
Rev. 0 | Page 11 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
VDD1A 1
GND1* 2
VIA 3
VIB 4
VIC 5
VID 6
VDD1B 7
VOE 8
VIF 9
GND1* 10
ADuM7641
TOP VIEW
(Not to Scale)
20 VDD2A
19 GND2*
18 VOA
17 VOB
16 VOC
15 VOD
14 VDD2B
13 VIE
12 VOF
11 GND2*
*PIN 2 AND PIN 10 ARE INTERNALLY CONNECTED.
CONNECTING BOTH PINS TO PCB SIDE 1 GROUND
IS RECOMMENDED. PIN 11 AND PIN 19 ARE
INTERNALLY CONNECTED. CONNECTING BOTH
PINS TO PCB SIDE 2 GROUND IS RECOMMENDED.
Figure 7. ADuM7641 Pin Configuration
Table 21. ADuM7641 Pin Function Descriptions
Pin No. Mnemonic Description
1
VDD1A
Supply Voltage A for Isolator Side 1 (3.0 V to 5.5 V). Pin 1 must be connected externally to Pin 7. Connect a 0.01 µF to
0.1 µF between VDD1A (Pin 1) and GND1 (Pin 2).
2
GND1
Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
3 VIA
Logic Input A.
4 VIB
Logic Input B.
5 VIC
Logic Input C.
6 VID
Logic Input D.
7 VDD1B Supply Voltage B for Isolator Side 1 (3.0 V to 5.5 V). Pin 7 must be connected externally to Pin 1. Connect a 0.01 µF to
0.1 µF between VDD1B (Pin 7) and GND1 (Pin 10).
8 VOE
Logic Output E.
9 VIF
Logic Input F.
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10 GND1 Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
11 GND2 Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
12 VOF
Logic Output F.
13 VIE
Logic Input E.
14 VDD2B
Supply Voltage B for Isolator Side 2 (3.0 V to 5.5 V). Pin 14 must be connected externally to Pin 20. Connect a 0.01 µF
to 0.1 µF between VDD2B (Pin 14) and GND2 (Pin 11).
15 VOD
Logic Output D.
16 VOC
Logic Output C.
17 VOB
Logic Output B.
18 VOA
Logic Output A.
19 GND2 Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
20 VDD2A
Supply Voltage A for Isolator Side 2 (3.0 V to 5.5 V). Pin 20 must be connected externally to Pin 14. Connect a 0.01 µF
to 0.1 µF between VDD2A (Pin 20) and GND2 (Pin 19).
Reference the AN-1109 Application Note for specific layout guidelines.
Rev. 0 | Page 12 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
VDD1A 1
GND1* 2
VIA 3
VIB 4
VIC 5
VOD 6
VDD1B 7
VOE 8
VIF 9
GND1* 10
ADuM7642
TOP VIEW
(Not to Scale)
20 VDD2A
19 GND2*
18 VOA
17 VOB
16 VOC
15 VID
14 VDD2B
13 VIE
12 VOF
11 GND2*
*PIN 2 AND PIN 10 ARE INTERNALLY CONNECTED.
CONNECTING BOTH PINS TO PCB SIDE 1 GROUND
IS RECOMMENDED. PIN 11 AND PIN 19 ARE
INTERNALLY CONNECTED. CONNECTING BOTH
PINS TO PCB SIDE 2 GROUND IS RECOMMENDED.
Figure 8. ADuM7642 Pin Configuration
Table 22. ADuM7642 Pin Function Descriptions
Pin No. Mnemonic Description
1
VDD1A
Supply Voltage A for Isolator Side 1 (3.0 V to 5.5 V). Pin 1 must be connected externally to Pin 7. Connect a 0.01 µF to
0.1 µF between VDD1A (Pin 1) and GND1 (Pin 2).
2
GND1
Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
3 VIA
Logic Input A.
4 VIB
Logic Input B.
5 VIC
Logic Input C.
6 VOD
Logic Output D.
7 VDD1B Supply Voltage B for Isolator Side 1 (3.0 V to 5.5 V). Pin 7 must be connected externally to Pin 1. Connect a 0.01 µF to
0.1 µF between VDD1B (Pin 7) and GND1 (Pin 10).
8 VOE
Logic Output E.
9 VIF
Logic Input F.
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10 GND1 Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
11 GND2 Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
12 VOF
Logic Output F.
13 VIE
Logic Input E.
14 VDD2B
Supply Voltage B for Isolator Side 2 (3.0 V to 5.5 V). Pin 14 must be connected externally to Pin 20. Connect a 0.01 µF
to 0.1 µF between VDD2B (Pin 14) and GND2 (Pin 11).
15 VID
Logic Input D.
16 VOC
Logic Output C.
17 VOB
Logic Output B.
18 VOA
Logic Output A.
19 GND2 Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
20 VDD2A
Supply Voltage A for Isolator Side 2 (3.0 V to 5.5 V). Pin 20 must be connected externally to Pin 14. Connect a 0.01 µF
to 0.1 µF between VDD2A (Pin 20) and GND2 (Pin 19).
Reference the AN-1109 Application Note for specific layout guidelines.
Rev. 0 | Page 13 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
VDD1A 1
GND1* 2
VIA 3
VIB 4
VOC 5
VOD 6
VDD1B 7
VOE 8
VIF 9
GND1* 10
ADuM7643
TOP VIEW
(Not to Scale)
20 VDD2A
19 GND2*
18 VOA
17 VOB
16 VIC
15 VID
14 VDD2B
13 VIE
12 VOF
11 GND2*
*PIN 2 AND PIN 10 ARE INTERNALLY CONNECTED.
CONNECTING BOTH PINS TO PCB SIDE 1 GROUND
IS RECOMMENDED. PIN 11 AND PIN 19 ARE
INTERNALLY CONNECTED. CONNECTING BOTH
PINS TO PCB SIDE 2 GROUND IS RECOMMENDED.
Figure 9. ADuM7643 Pin Configuration
Table 23. ADuM7643 Pin Function Descriptions
Pin No. Mnemonic Description
1
VDD1A
Supply Voltage A for Isolator Side 1 (3.0 V to 5.5 V). Pin 1 must be connected externally to Pin 7. Connect a 0.01 µF to
0.1 µF between VDD1A (Pin 1) and GND1 (Pin 2).
2
GND1
Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
3 VIA
Logic Input A.
4 VIB
Logic Input B.
5 VOC
Logic Output C.
6 VOD
Logic Output D.
7 VDD1B Supply Voltage B for Isolator Side 1 (3.0 V to 5.5 V). Pin 7 must be connected externally to Pin 1. Connect a 0.01 µF to
0.1 µF between VDD1B (Pin 7) and GND1 (Pin 10).
8 VOE
Logic Output E.
9 VIF
Logic Input F.
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10 GND1 Ground Reference for Isolator Side 1. Pin 2 and Pin 10 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
11 GND2 Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
12 VOF
Logic Output F.
13 VIE
Logic Input E.
14 VDD2B
Supply Voltage B for Isolator Side 2 (3.0 V to 5.5 V). Pin 14 must be connected externally to Pin 20. Connect a 0.01 µF
to 0.1 µF between VDD2B (Pin 14) and GND2 (Pin 11).
15 VID
Logic Input D.
16 VIC
Logic Input C.
17 VOB
Logic Output B.
18 VOA
Logic Output A.
19 GND2 Ground Reference for Isolator Side 2. Pin 11 and Pin 19 are internally connected, and connecting both pins to the PCB
ground plane is recommended.
20 VDD2A
Supply Voltage A for Isolator Side 2 (3.0 V to 5.5 V). Pin 20 must be connected externally to Pin 14. Connect a 0.01 µF
to 0.1 µF between VDD2A (Pin 20) and GND2 (Pin 19).
Reference the AN-1109 Application Note for specific layout guidelines.
Rev. 0 | Page 14 of 20
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(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
TYPICAL PERFORMANCE CHARACTERISTICS
10
8
6
5V
4
3.3V
2
0
0 5 10 15 20 25 30
DATA RATE (Mbps)
Figure 10. Typical Supply Current per Input Channel vs. Data Rate
for 5 V and 3.3 V Operation
4
3
2
5V
1
3.3V
0
0 5 10 15 20 25 30
DATA RATE (Mbps)
Figure 11. Typical Supply Current per Output Channel vs. Data Rate
for 5 V and 3.3 V Operation (No Output Load)
4
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3
2 5V
3.3V
1
0
0 5 10 15 20 25 30
DATA RATE (Mbps)
Figure 12. Typical Supply Current per Output Channel vs. Data Rate
for 5 V and 3.3 V Operation (15 pF Output Load)
45
40
35
30
25
5V
20
3.3V
15
10
5
0
0 5 10 15 20 25
DATA RATE (Mbps)
Figure 13. Typical ADuM7640 VDD1 Supply Current vs. Data Rate
for 5 V and 3.3 V Operation
12
10
8
5V
6
3.3V
4
2
0
0 5 10 15 20 25
DATA RATE (Mbps)
Figure 14. Typical ADuM7640 VDD2 Supply Current vs. Data Rate
for 5 V and 3.3 V Operation
40
35
30
25
5V
20
15
3.3V
10
5
0
0 5 10 15 20 25
DATA RATE (Mbps)
Figure 15. Typical ADuM7641 VDD1 Supply Current vs. Data Rate
for 5 V and 3.3 V Operation
Rev. 0 | Page 15 of 20
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(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
18
16
14
12
5V
10
8
3.3V
6
4
2
0
0 5 10 15 20 25
DATA RATE (Mbps)
Figure 16. Typical ADuM7641 VDD2 Supply Current vs. Data Rate
for 5 V and 3.3 V Operation
35
30
25
20
5V
15
3.3V
10
5
0
0 5 10 15 20
DATA RATE (Mbps)
Figure 17. Typical ADuM7642 VDD1 Supply Current vs.
Data Rate for 5 V and 3.3 V Operation
25
25
20
15
5V
10
3.3V
5
0
0 5 10 15 20
DATA RATE (Mbps)
Figure 18. Typical ADuM7642 VDD2 Supply Current vs.
Data Rate for 5 V and 3.3 V Operation
25
30
25
20
5V
15
3.3V
10
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5
0
0 5 10 15 20 25
DATA RATE (Mbps)
Figure 19. Typical ADuM7643 VDD1 or VDD2 Supply Current vs.
Data Rate for 5 V and 3.3 V Operation
Rev. 0 | Page 16 of 20
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(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
APPLICATIONS INFORMATION
PRINTED CIRCUIT BOARD LAYOUT
The ADuM7640/ADuM7641/ADuM7642/ADuM7643 digital
isolators require no external interface circuitry for the logic
interfaces. Power supply bypassing is strongly recommended at the
input and output supply pins (see Figure 20). Connect four bypass
capacitors between Pin 1 and Pin 2 for VDD1A, between Pin 7 and
Pin 10 for VDD1B, between Pin 11 and Pin 14 for VDD2B, and between
Pin 19 and Pin 20 for VDD2A. Connect the VDD1A supply pin and the
VDD1B supply pin together, and connect the VDD2B supply pin and
VDD2A supply pin together. The capacitor values should be from
0.01 µF to 0.1 µF. The total lead length between both ends of the
capacitor and the power supply pin should not exceed 20 mm.
VDD1A
GND1
VIA
VIB
VIC/VOC
VID/VOD
VDD1B
VIE/VOE
VIF
GND1
VDD2A
GND2
VOA
VOB
VOC/VIC
VOD/VID
VDD2B
VOE/VIE
VOF
GND2
Figure 20. Recommended Printed Circuit Board Layout
In applications involving high common-mode transients, it is
important to minimize board coupling across the isolation barrier.
Furthermore, users should design the board layout so that any
coupling that occurs affects all pins equally on a given component
side. Failure to follow this design guideline can cause voltage
differentials between pins that exceed the absolute maximum
ratings of the device, which can lead to latch-up or permanent
damage.
With proper PCB design choices, the ADuM7640/ADuM7641/
ADuM7642/ADuM7643 can readily meet CISPR 22 Class A
(and FCC Class A) emissions standards, as well as the more
stringent CISPR 22 Class B (and FCC Class B) standards in
an unshielded environment. For PCB-related EMI mitigation
techniques, including board layout and stack-up issues, see the
AN-1109 Application Note.
PROPAGATION DELAY-RELATED PARAMETERS
Propagation delay is a parameter that describes the time it takes
a logic signal to propagate through a component. The input-to-
output propagation delay time for a high-to-low transition may
differ from the propagation delay time for a low-to-high transition.
INPUT (VIx)
50%
tPLH
tPHL
OUTPUT (VOx)
50%
Figure 21. Propagation Delay Parameters
Pulse width distortion is the maximum difference between these
two propagation delay values and is an indication of how accurately
the timing of the input signal is preserved.
Channel-to-channel matching refers to the maximum amount
of time that the propagation delay differs between channels
within a single ADuM7640/ADuM7641/ADuM7642/ADuM7643
component.
Propagation delay skew refers to the maximum amount of time
that the propagation delay differs between multiple ADuM7640/
ADuM7641/ADuM7642/ADuM7643 components operating
under the same conditions.
DC CORRECTNESS
www.DataSheet.net/ Positive and negative logic transitions at the isolator input
cause narrow (~1 ns) pulses to be sent to the decoder using the
transformer. The decoder is bistable and is, therefore, either set
or reset by the pulses, indicating input logic transitions. In the
absence of logic transitions at the input for more than ~1 µs, a
periodic set of refresh pulses indicative of the correct input state
is sent to ensure dc correctness at the output. If the decoder receives
no internal pulses for more than approximately 5 µs, the input side
is assumed to be unpowered or nonfunctional, in which case the
isolator output is forced to a default high state by the watchdog
timer circuit.
Rev. 0 | Page 17 of 20
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ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
MAGNETIC FIELD IMMUNITY
The magnetic field immunity of the ADuM7640/ADuM7641/
ADuM7642/ADuM7643 is determined by the changing magnetic
field, which induces a voltage in the transformer receiving coil
large enough to either falsely set or reset the decoder. The following
analysis defines the conditions under which this can occur. The
3 V operating condition of the ADuM7640/ADuM7641/
ADuM7642/ADuM7643 is examined because it represents the
most susceptible mode of operation.
The pulses at the transformer output have an amplitude greater
than 1.0 V. The decoder has a sensing threshold at approximately
0.5 V, thus establishing a 0.5 V margin in which induced voltages
can be tolerated. The voltage induced across the receiving coil is
given by
V = (−dβ/dt) ∑ π rn2; n = 1, 2, … , N
where:
β is magnetic flux density (gauss).
rn is the radius of the nth turn in the receiving coil (cm).
N is the total number of turns in the receiving coil.
Given the geometry of the receiving coil in the ADuM7640/
ADuM7641/ADuM7642/ADuM7643 and an imposed
requirement that the induced voltage be, at most, 50% of the 0.5 V
margin at the decoder, a maximum allowable magnetic field at a
given frequency can be calculated. The result is shown in Figure 22.
1000
100
10
1
0.1
0.01
0.001
1k
10k 100k 1M 10M 100M
MAGNETIC FIELD FREQUENCY (Hz)
Figure 22. Maximum Allowable External Magnetic Flux Density
For example, at a magnetic field frequency of 1 MHz, the maximum
allowable magnetic field of 0.5 kgauss induces a voltage of 0.25 V at
the receiving coil. This voltage is approximately 50% of the sensing
threshold and does not cause a faulty output transition. Similarly, if
such an event occurs during a transmitted pulse and is of the
worst-case polarity, it reduces the received pulse from >1.0 V to
0.75 V, still well above the 0.5 V sensing threshold of the decoder.
The preceding magnetic flux density values correspond to specific
current magnitudes at given distances from the ADuM7640/
ADuM7641/ADuM7642/ADuM7643 transformers. Figure 23
shows these allowable current magnitudes as a function of
frequency for selected distances. As shown in Figure 23, the
ADuM7640/ ADuM7641/ADuM7642/ADuM7643 are extremely
immune and can be affected only by extremely large currents
operated at high frequency very close to the component. For the
1 MHz example noted previously, a 1.2 kA current would have
to be placed 5 mm away from the ADuM7640/ADuM7641/
ADuM7642/ADuM7643 to affect the operation of the component.
1000
100
10
1
0.1
0.01
1k
DISTANCE = 5mm
DISTANCE = 100mm
DISTANCE = 1m
10k 100k 1M 10M
MAGNETIC FIELD FREQUENCY (Hz)
100M
Figure 23. Maximum Allowable Current for Various
Current-to-ADuM7640/ADuM7641/ADuM7642/ADuM7643 Spacings
Notewww.DataSheet.net/ that at combinations of strong magnetic field and high
frequency, any loops formed by printed circuit board traces can
induce error voltages sufficiently large to trigger the thresholds
of succeeding circuitry. Take care in the layout of such traces to
avoid this possibility.
Rev. 0 | Page 18 of 20
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ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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Data Sheet
ADuM7640/ADuM7641/ADuM7642/ADuM7643
POWER CONSUMPTION
The supply current at a given channel of the ADuM7640/
ADuM7641/ADuM7642/ADuM7643 isolator is a function of
the supply voltage, the data rate of the channel, and the output
load of the channel.
For each input channel, the supply current is given by
IDDI = IDDI (Q)
f ≤ 0.5 fr
IDDI = IDDI (D) × (2f fr) + IDDI (Q)
f > 0.5 fr
For each output channel, the supply current is given by
IDDO = IDDO (Q)
f ≤ 0.5 fr
IDDO = (IDDO (D) + (0.5 × 10−3) × CL × VDDO) × (2f − fr) + IDDO (Q)
f > 0.5 fr
where:
IDDI (D), IDDO (D) are the input and output dynamic supply currents
per channel (mA/Mbps).
IDDI (Q), IDDO (Q) are the specified input and output quiescent
supply currents (mA).
f is the input logic signal frequency (MHz); it is half the input
data rate, expressed in units of Mbps.
fr is the input stage refresh rate (Mbps).
CL is the output load capacitance (pF).
VDDO is the output supply voltage (V).
To calculate the total VDD1 and VDD2 supply current, the supply
currents for each input and output channel corresponding to
VDD1 and VDD2 are calculated and totaled. Figure 10 and Figure 11
show per-channel supply currents as a function of data rate for
an unloaded output condition. Figure 12 shows the per-channel
supply current as a function of data rate for a 15 pF output
condition. Figure 13 through Figure 17 show the total VDD1 and
VDD2 supply current as a function of data rate for ADuM7640/
ADuM7641/ADuM7642/ADuM7643 channel configurations.
The insulation lifetime of the ADuM7640/ADuM7641/
ADuM7642/ADuM7643 depends on the voltage waveform type
imposed across the isolation barrier. The iCoupler insulation
structure degrades at different rates depending on whether the
waveform is bipolar ac, unipolar ac, or dc. Figure 24, Figure 25,
and Figure 26 illustrate these different isolation voltage
waveforms.
Bipolar ac voltage is the most stringent environment. The goal
of a 50-year operating lifetime under the bipolar ac condition
determines the Analog Devices recommended maximum
working voltage.
In the case of unipolar ac or dc voltage, the stress on the insulation
is significantly lower. This allows operation at higher working
voltages while still achieving a 50-year service life. The working
voltages listed in Table 18 can be applied while maintaining the
50-year minimum lifetime, provided that the voltage conforms to
either the unipolar ac or dc voltage case. Any cross-insulation
voltage waveform that does not conform to Figure 25 or Figure 26
should be treated as a bipolar ac waveform, and its peak voltage
should be limited to the 50-year lifetime voltage value listed in
Table 18.
The voltage presented in Figure 25 is shown as sinusoidal for
illustration purposes only. It is meant to represent any voltage
waveform varying between 0 V and some limiting value. The
limiting value can be positive or negative, but the voltage cannot
cross 0 V.
www.DataSheet.net/
RATED PEAK VOLTAGE
0V
Figure 24. Bipolar AC Waveform
RATED PEAK VOLTAGE
INSULATION LIFETIME
All insulation structures eventually break down when subjected to
voltage stress over a sufficiently long period. The rate of insulation
degradation depends on the characteristics of the voltage waveform
applied across the insulation. In addition to the testing performed
by the regulatory agencies, Analog Devices carries out an extensive
set of evaluations to determine the lifetime of the insulation
structure within the ADuM7640/ADuM7641/ADuM7642/
ADuM7643 components.
0V
Figure 25. Unipolar AC Waveform
RATED PEAK VOLTAGE
0V
Figure 26. DC Waveform
Analog Devices performs accelerated life testing using voltage
levels higher than the rated continuous working voltage. Accel-
eration factors for several operating conditions are determined.
These factors allow calculation of the time to failure at the actual
working voltage. The values shown in Table 18 summarize the peak
voltage for 50 years of service life for a bipolar ac operating
condition and the maximum working voltages. In many cases,
the approved working voltage is higher than the 50-year service life
voltage. Operation at these high working voltages can lead to
shortened insulation life in some cases.
Rev. 0 | Page 19 of 20
Datasheet pdf - http://www.DataSheet4U.co.kr/


ADuM7641 (Analog Devices)
(ADuM7640 - ADuM7643) 1 kV RMS Six-Channel Digital Isolators

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ADuM7640/ADuM7641/ADuM7642/ADuM7643
OUTLINE DIMENSIONS
0.345 (8.76)
0.341 (8.66)
0.337 (8.55)
Data Sheet
20 11
0.158 (4.01)
0.154 (3.91)
0.150 (3.81) 0.244 (6.20)
0.236 (5.99)
1 10
0.228 (5.79)
0.065 (1.65)
0.049 (1.25)
0.010 (0.25)
0.004 (0.10)
COPLANARITY
0.004 (0.10)
0.025 (0.64)
BSC
0.012 (0.30)
0.008 (0.20)
0.069 (1.75)
0.053 (1.35)
SEATING
PLANE
0.010 (0.25)
0.006 (0.15)
0.020 (0.51)
0.010 (0.25)
0.041 (1.04)
REF
0.050 (1.27)
0.016 (0.41)
ORDERING GUIDE
Model1
Number
of Inputs,
VDD1 Side
ADuM7640ARQZ
6
ADuM7640ARQZ-RL7 6
ADuM7640CRQZ
6
ADuM7640CRQZ-RL7 6
ADuM7641ARQZ
5
ADuM7641ARQZ-RL7 5
ADuM7641CRQZ
5
ADuM7641CRQZ-RL7 5
ADuM7642ARQZ
4
ADuM7642ARQZ-RL7 4
ADuM7642CRQZ
4
ADuM7642CRQZ-RL7 4
ADuM7643ARQZ
3
ADuM7643ARQZ-RL7 3
ADuM7643CRQZ
3
ADuM7643CRQZ-RL7 3
COMPLIANT TO JEDEC STANDARDS MO-137-AD
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 27. 20-Lead Shrink Small Outline Package [QSOP]
(RQ-20)
Dimensions shown in inches and (millimeters)
Number
of Inputs,
VDD2 Side
0
0
Maximum
Data Rate
1 Mbps
1 Mbps
Maximum
Propagation
Delay, 5 V
20 ns
20 ns
Maximum
Pulse Width
Distortion
75 ns
www.DataSheet.net/
75 ns
0 25 Mbps 14 ns
0 25 Mbps 14 ns
50 ns
50 ns
1
1 Mbps
20 ns
1
1 Mbps
20 ns
75 ns
75 ns
1 25 Mbps 14 ns
1 25 Mbps 14 ns
50 ns
50 ns
2
1 Mbps
20 ns
2
1 Mbps
20 ns
75 ns
75 ns
2 25 Mbps 14 ns
2 25 Mbps 14 ns
50 ns
50 ns
3
1 Mbps
20 ns
3
1 Mbps
20 ns
75 ns
75 ns
3 25 Mbps 14 ns
3 25 Mbps 14 ns
50 ns
50 ns
Temperature
Range
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
Package
Description
20-Lead QSOP
20-Lead QSOP,
7” Tape and Reel
20-Lead QSOP
20-Lead QSOP,
7” Tape and Reel
20-Lead QSOP
20-Lead QSOP,
7” Tape and Reel
20-Lead QSOP
20-Lead QSOP,
7” Tape and Reel
20-Lead QSOP
20-Lead QSOP,
7” Tape and Reel
20-Lead QSOP
20-Lead QSOP,
7” Tape and Reel
20-Lead QSOP
20-Lead QSOP,
7” Tape and Reel
20-Lead QSOP
20-Lead QSOP,
7” Tape and Reel
1 Z = RoHS Compliant Part.
Package
Option
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
RQ-20
©2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D10448-0-9/12(0)
Rev. 0 | Page 20 of 20
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