ADUM7640 Datasheet, PDF (1/20 Pages) Analog Devices – 1 kV RMS Six-Channel Digital Isolators

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
FUNCTIONAL BLOCK DIAGRAMS
V_DD1A 1 _ADuM7640
GND₁ 2
V_IA 3
ENCODE
DECODE
V_IB 4
ENCODE
DECODE
V_IC 5
ENCODE
DECODE
V_ID 6
ENCODE
DECODE
V_DD1B 7
V_IE 8
ENCODE
DECODE
V_IF 9
ENCODE
DECODE
GND₁ 10
Figure 1. ADuM7640
20 V_DD2A
19 GND₂
18 V_OA
17 V_OB
16 V_OC
15 V_OD
14 V_DD2B
13 V_OE
12 V_OF
11 GND₂
V_DD1A 1 _ADuM7641
GND₁ 2
V_IA 3
ENCODE
V_IB 4
ENCODE
V_IC 5
ENCODE
V_ID 6
ENCODE
V_DD1B 7
V_OE 8
DECODE
V_IF 9
ENCODE
GND₁ 10
DECODE
DECODE
DECODE
DECODE
ENCODE
DECODE
Figure 2. ADuM7641
20 V_DD2A
19 GND₂
18 V_OA
17 V_OB
16 V_OC
15 V_OD
14 V_DD2B
13 V_IE
12 V_OF
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.}
V_DD1A 1 _ADuM7642
GND₁ 2
V_IA 3
ENCODE
V_IB 4
ENCODE
V_IC 5
ENCODE
V_OD 6
DECODE
V_DD1B 7
V_OE 8
DECODE
V_IF 9
ENCODE
GND₁ 10
DECODE
DECODE
DECODE
ENCODE
ENCODE
DECODE
Figure 3. ADuM7642
20 V_DD2A
19 GND₂
18 V_OA
17 V_OB
16 V_OC
15 V_ID
14 V_DD2B
13 V_IE
12 V_OF
11 GND₂
V_DD1A 1 _ADuM7643
GND₁ 2
V_IA 3
ENCODE
V_IB 4
ENCODE
V_OC 5
DECODE
V_OD 6
DECODE
V_DD1B 7
V_OE 8
DECODE
V_IF 9
ENCODE
GND₁ 10
DECODE
DECODE
ENCODE
ENCODE
ENCODE
DECODE
Figure 4. ADuM7643
20 V_DD2A
19 GND₂
18 V_OA
17 V_OB
16 V_IC
15 V_ID
14 V_DD2B
13 V_IE
12 V_OF
11 GND₂
Rev. 0
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