ISO1050DWR for Isolated CAN Bus Communication

ElecSuppliers Part Number GuideSep 06, 2026

ISO1050DWR from Texas Instruments is an isolated CAN transceiver designed for systems that need reliable CAN communication while maintaining galvanic isolation between the controller and bus sides. The device follows ISO 11898-2 requirements and combines a CAN transceiver with an integrated capacitive isolation barrier.

With a 5kVrms isolation rating, robust common-mode transient immunity and protection features on the CAN bus, ISO1050DWR is well suited to industrial equipment where ground potential differences and electrical noise can affect communication reliability.

1Mbps CAN Communication

ISO1050DWR supports high-speed CAN communication at data rates up to 1Mbps. Its CAN physical-layer interface is designed for differential signaling over twisted-pair networks, providing reliable communication between controllers, gateways and distributed industrial nodes.

The device is suitable for standard CAN networks where predictable bus operation and electrical isolation are more important than the higher data rates offered by CAN FD.

Its CAN receiver and driver architecture supports dominant and recessive bus states while maintaining the electrical characteristics required for ISO 11898-compliant networks.

5kVrms Galvanic Isolation

The isolation barrier is one of the main features of ISO1050DWR. It provides 5000Vrms isolation between the logic-side and bus-side circuitry, helping prevent high-voltage transients and ground potential differences from directly reaching the host controller.

This architecture is useful when CAN nodes are distributed across different sections of an industrial system or when the CAN bus operates in an electrically noisy environment.

The device also provides strong common-mode transient immunity, helping maintain signal integrity when the voltage between the isolated domains changes rapidly.

Protection for Industrial CAN Networks

CAN bus wiring can be exposed to electrical disturbances caused by motors, switching equipment and long cable runs. ISO1050DWR incorporates protection functions intended to improve system robustness under these conditions.

The CAN bus pins provide protection against bus faults and transient conditions, while thermal shutdown helps protect the transceiver when excessive junction temperature occurs.

The receiver also enters a high-impedance state when the device is unpowered, reducing the possibility of an inactive node interfering with an operating CAN network.

Flexible Logic-Side Interface

ISO1050DWR operates with a logic-side supply suitable for common 3.3V and 5V digital systems. This allows the isolated CAN interface to be connected directly to microcontrollers, processors and other digital control devices.

The separation between the logic and CAN bus domains gives designers greater flexibility when building systems with independently powered control and fieldbus sections.

This is particularly useful in PLC interfaces, motor controllers, industrial gateways and instrumentation where isolation is required between the processor and external wiring.

Wide Industrial Temperature Range

ISO1050DWR is supplied in a wide-body SOIC package designed to provide the creepage and clearance distance required by an isolated interface.

The device supports an industrial temperature range of -40°C to +105°C, making it suitable for control cabinets, factory automation equipment and other embedded systems operating outside typical consumer environments.

The combination of a compact integrated transceiver, isolation barrier and protection functions can reduce the number of components required around an isolated CAN interface.

Applications in Industrial Control

ISO1050DWR can be used in industrial automation controllers, PLC communication modules, motor drives, building automation equipment, CAN gateways and distributed I/O systems.

It is also suitable for isolated CAN interfaces in instrumentation, battery and energy systems where the communication bus must remain electrically separated from sensitive control electronics.