ADuM7640/ADuM7641/ADuM7642/ADuM7643
Data Sheet
1
2
20
19
18
17
16
15
14
13
12
11
V
V
DD1A
DD2A
GND *
GND *
1
2
3
V
V
V
V
V
V
V
V
IA
IB
OA
OB
IC
4
V
ADuM7643
TOP VIEW
5
V
V
OC
OD
(Not to Scale)
6
ID
7
V
DD1B
DD2B
IE
8
V
OE
9
V
IF
OF
10
GND *
GND *
2
1
*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
4
5
6
7
VIA
VIB
VOC
VOD
VDD1B
Logic Input A.
Logic Input B.
Logic Output C.
Logic Output D.
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
9
VOE
VIF
Logic Output E.
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
13
14
VOF
VIE
VDD2B
Logic Output F.
Logic Input E.
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
16
17
18
19
VID
VIC
VOB
VOA
GND2
Logic Input D.
Logic Input C.
Logic Output B.
Logic Output A.
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