ADuM5020/ADuM5028 Data Sheet
Rev. 0 | Page 10 of 18
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1
2
3
4
16
15
14
13
5 12
6 11
7 10
8 9
ADuM5020
TO
P
VIEW
(Not to Scale)
NIC = NO INTERNAL
CONNECTION.
LEAVE THESE PINS FLO
ATING.
GND
1
GND
1
PDIS
NIC
V
DDP
GND
1
NIC
GND
1
NIC
NIC
GND
ISO
GND
ISO
GND
ISO
V
SEL
V
ISO
GND
ISO
16520-003
Figure 5. Pin Configuration
Table 15. ADuM5020 Pin Function Descriptions
Pin No. Mnemonic Description
1, 7, 10, 16 NIC No Internal Connection. Leave these pins floating.
2, 4, 6, 8 GND
1
Ground 1. Ground reference for the primary. It is recommended that these pins be connected to a common ground.
3 PDIS Power Disable. When tied to any GND
1
pin, the V
ISO
output voltage is active. When a logic high voltage is
applied, the V
ISO
output voltage is shut down. Do not leave this pin floating.
5 V
DDP
Primary Supply Voltage, 4.5 V to 5.5 V.
9, 11, 13, 15 GND
ISO
Ground Reference for V
ISO
on Side 2. It is recommended that these pins be connected to a common ground.
12 V
ISO
Secondary Supply Voltage Output for External Loads.
14 V
SEL
Output Voltage Selection.
1
2
8
7
3 6
4 5
ADuM5028
TOP VIEW
(Not to Scale)
GND
1
PDIS
V
DDP
GND
1
GND
ISO
GND
ISO
V
SEL
V
ISO
16520-106
Figure 6. ADuM5028 Pin Configuration
Table 16. ADuM5028 Pin Function Descriptions
Pin No. Mnemonic Description
1 PDIS Power Disable. When tied to any GND
1
pin, the V
ISO
output voltage is active. When a logic high voltage is applied,
the V
ISO
output voltage is shut down. Do not leave this pin floating.
2, 4 GND
1
Ground 1. Ground reference for the primary. It is recommended that these pins be connected to a common ground.
3 V
DDP
Primary Supply Voltage, 4.5 V to 5.5 V.
5, 7 GND
ISO
Ground Reference for V
ISO
on Side 2. It is recommended that these pins be connected together.
6 V
ISO
Secondary Supply Voltage Output for External Loads.
8 V
SEL
Output Voltage Selection. Connect V
SEL
to V
ISO
for 5 V output or connect V
SEL
to GND
ISO
for 3.3 V output. This pin has a
weak internal pull-up; therefore, do not leave this pin floating.
TRUTH TABLE
Table 17. Truth Table (Positive Logic)
V
DDP
(V) V
SEL
Input PDIS Input V
ISO
Output (V)
5 High Low 5
5 Don’t care High 0
5 Low Low 3.3
5 Don’t care High 0