ADuM5401/ADuM5402/ADuM5403/ADuM5404
Data Sheet
V
1
2
3
4
5
6
7
8
16
V
ISO
DD1
GND
15 GND
1
OA
OB
OC
OD
ISO
V
V
V
V
14
13
12
11
10
9
V
V
V
V
V
IA
ADuM5404
IB
TOP VIEW
(Not to Scale)
IC
ID
RC
OUT
SEL
GND
GND
ISO
1
Figure 10. ADuM5404 Pin Configuration
Table 24. ADuM5404 Pin Function Descriptions
Pin No. Mnemonic Description
1
VDD1
Primary Supply Voltage, 3.0 V to 5.5 V.
2, 8
GND1
Ground 1. Ground reference for isolator primary. Pin 2 and Pin 8 are internally connected, and it is recommended
that both pins be connected to a common ground.
3
4
5
6
7
VOA
VOB
VOC
VOD
RCOUT
Logic Output A.
Logic Output B.
Logic Output C.
Logic Output D.
Regulation Control Output. This pin is connected to the RCIN pin of a slave isoPower device to allow the ADuM5404
to control the regulation of the slave device.
9, 15
GNDISO
Ground Reference for Isolator Side 2. Pin 9 and Pin 15 are internally connected, and it is recommended that both
pins be connected to a common ground.
10
11
12
13
14
16
VSEL
VID
VIC
VIB
VIA
Output Voltage Selection. When VSEL = VISO, the VISO setpoint is 5.0 V. When VSEL = GNDISO, the VISO setpoint is 3.3 V.
Logic Input D.
Logic Input C.
Logic Input B.
Logic Input A.
VISO
Secondary Supply Voltage Output for External Loads, 3.3 V (VSEL Low) or 5.0 V (VSEL High).
TRUTH TABLE
Table 25. Truth Table (Positive Logic)
1
2
VSEL
RCOUT
PWM
PWM
PWM
PWM
VDD1 (V)
VISO (V)
Notes
H
L
L
H
5
5
3.3
3.3
5
Master mode, normal operation
Master mode, normal operation
Master mode, normal operation
This supply configuration is not recommended due to extremely poor efficiency
3.3
3.3
5
1 H refers to a high logic, and L refers to a low logic.
2 PWM refers to the regulation control signal. This signal is derived from the secondary side regulator and can be used to control other isoPower devices.
Rev. C | Page 16 of 28
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