Datasheet

ADM3053 Data Sheet
Rev. E | Page 8 of 18
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
GND1
1
NC
2
GND1
3
RxD
4
GND2
20
V
ISOIN
19
R
S
18
CANH
17
TxD
5
GND2
16
V
IO
6
CANL
15
GND1
7
V
REF
14
V
CC
8
GND2
13
GND1
9
V
ISOOUT
12
GND1
10
GND2
11
ADM3053
T
O
P
VIEW
(Not to Scale)
NOTES
1.
NC = NO CONNECT. DO NOT
CONNECT TO THIS PIN.
2. PIN 12 AND PIN 19 MUST BE
CONNECTED EXTERNALLY.
09293-005
Figure 4. Pin Configuration
Table 8. Pin Function Descriptions
Pin No. Mnemonic Description
1, 3, 7, 9, 10
GND1
Ground, Logic Side.
2 NC No Connect. Do not connect to this pin.
4 RxD Receiver Output Data.
5 TxD Driver Input Data.
6 V
IO
i
Coupler Power Supply. It is recommended that a 0.1 μF and a 0.01 μF decoupling capacitor be fitted
between Pin 6 and GND1. See
Figure 28 for layout recommendations.
8 V
CC
iso
Power Power Supply. It is recommended that a 0.1 μF and a 10 μF decoupling capacitor be fitted
between Pin 8 and Pin 9.
11, 13 GND2
Ground for Isolated DC-to-DC Converter. It is recommended to connect Pin 11 and Pin 13 together through
one ferrite bead to the PCB ground.
12 V
ISOOUT
Isolated Power Supply Output. This pin must be connected externally to V
ISOIN
. It is recommended that a ferrite
bead reservoir capacitor of 10 μF and a decoupling capacitor of 0.1 μF be fitted between Pin 12 and Pin 11.
14
V
REF
Reference Voltage Output. It is recommended not to connect to this pin.
15 CANL Low-Level CAN Voltage Input/Output.
16, 20 GND2 Ground, Bus Side.
17 CANH High-Level CAN Voltage Input/Output.
18 R
S
Slope Control Pin. Short this pin to GND2 (Pin 16 or Pin 20) for full speed operation. Use a weak pull-down for
slope control. An input high places the transceiver in standby. This pin must not be left floating.
19 V
ISOIN
Isolated Power Supply Input. This pin must be connected externally to V
ISOOUT
. It is recommended this pin
have a 0.1 μF capacitor to GND2 (Pin13 or Pin 11). Connect this pin through a ferrite bead and short trace
length to V
ISOIN
for operation.