ADuM5200/ADuM5201/ADuM5202 Data Sheet
Rev. B | Page 14 of 28
V
DD1
1
GND
1
2
V
OA
3
V
OB
4
V
ISO
16
GND
ISO
15
V
IA
14
V
IB
13
RC
IN
5
NC
12
RC
SEL
6
V
SEL
11
V
E1
7
NC
10
GND
1
8
GND
ISO
9
ADuM5202
TOP VIEW
(Not to Scale)
07540-008
NC = NO CONNECT
Figure 8. ADuM5202 Pin Configuration
Table 23. ADuM5202 Pin Function Descriptions
Pin No.
Mnemonic Description
1 V
Primary Supply Voltage, 3.0 V to 5.5 V.
2, 8 GND
1
Ground 1. Ground reference for the isolator primary side. Pin 2 and Pin 8 are internally connected to each other, and
it is recommended that both pins be connected to a common ground.
3 V
Logic Output A.
4 V
Logic Output B.
5 RC
IN
Regulation Control Input. This pin must be connected to the RC
OUT
pin of a master
Power device or tied low. Note
that this pin must not be tied high if RC
SEL
is low; this combination causes excessive voltage on the secondary side,
damaging the
ADuM5202 and possibly the devices that it powers.
6 RC
SEL
Control Input. Determines self-regulation mode (RC
SEL
high) or slave mode (RC
SEL
low), allowing external regulation.
This pin is weakly pulled to the high state. In noisy environments, tie this pin either high or low.
7 V
E1
Data Enable Input. When this pin is high or not connected, the primary output is active; when this pin is low, the
output is in a high-Z state.
ISO
Ground Reference for Isolator Side 2. Pin 9 and Pin 15 are internally connected to each other, and it is recommended
that both pins be connected to a common ground.
10, 12 NC No Internal Connection.
11 V
SEL
Output Voltage Selection. When V
SEL
= V
ISO
, the V
ISO
setpoint is 5.0 V. When V
SEL
= GND
ISO
, the V
ISO
setpoint is 3.3 V.
In slave regulation mode, this pin has no function.
13 V
Logic Input B.
16 V
Secondary Supply Voltage. Output for secondary side isolated data channels and external loads.
TRUTH TABLE
Table 24. Power Section Truth Table (Positive Logic)
1
RC
SEL
Input
RC
IN
Input
V
SEL
Input
V
DD1
Input (V)
2
V
(V) Operation
H X H 5.0 5.0 Self regulation mode, normal operation.
H X L 5.0 3.3 Self regulation mode, normal operation.
H X L 3.3 3.3 Self regulation mode, normal operation.
H X H 3.3 5.0 This supply configuration is not recommended due to extremely poor efficiency.
L H X X X Part runs at maximum open-loop voltage; therefore, damage can occur.
L L X X 0 Power supply is disabled.
L RC
X X X Slave mode, RC
supplied by a master
Power device.
1
H refers to a high logic, L refers to a low logic, and X is don’t care or unknown.
2
V
DD1
must be common between all isoPower devices being regulated by a master isoPower part.
