High Speed Industrial CAN Transceiver
with Bus Protection for 24 V Systems
Data Sheet
ADM3051
Rev. A Document Feedback
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FEATURES
Physical layer CAN transceiver
5 V operation on V
CC
Complies with ISO 11898 standard
High speed data rates up to 1 Mbps
Short-circuit protection on CANH and CANL against shorts to
power/ground in 24 V systems
Unpowered nodes do not disturb the bus
Connect 110 or more nodes on the bus
Slope control for reduced EMI
Thermal shutdown protection
Low current standby mode
Industrial operating temperature range (−40°C to +125°C)
Available in 8-lead SOIC package
APPLICATIONS
CAN data buses
Industrial field networks
DeviceNet applications
CanOpen, CanKingdom
FUNCTIONAL BLOCK DIAGRAM
ADM3051
TxD
RS
RxD
V
REF
CC
MODE
THERMAL
SHUTDOWN
VOLTAGE
REFERENCE
D
R
CANH
CANL
GND
10029-001
Figure 1.
GENERAL DESCRIPTION
The ADM3051 is a controller area network (CAN) physical
layer transceiver allowing a protocol layer CAN controller to
access the physical layer bus. The ADM3051 complies with
the ISO 11898 standard. It is capable of running at data rates up
to 1 Mbps.
The device has current-limiting and thermal shutdown features
to protect against output short circuits and situations where the
bus may be shorted to ground or power terminals in 24 V bus
power systems. The part is fully specified over the industrial
temperature range of −40°C to +125°C and is available in an
8-lead SOIC package.
Three operating modes are available: high speed, slope control,
and standby. Pin 8 (RS) is used to select the operating mode.
The low current standby mode can be selected by applying a
logic high to RS.
The device can be set to operate with slope control to limit EMI
by connecting RS with a resistor to ground to modify the rise
and fall of slopes. This mode facilitates the use of unshielded
cables. Alternatively, disabling slope control by connecting RS
to ground allows high speed operation. Shielded cables or other
measures to control EMI are necessary in this mode.
