LTC2847CUHF#PBF

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LTC2847CUHF#PBF is an automotive isolated CAN bus transceiver featuring very robust ESD and voltage surge protection which is beneficial for operation in difficult environmental conditions. It supports one differential pair of CAN transceivers, as described in the CAN specifications 2.0B. The CAN protocol is an asynchronous serial communication protocol developed by Robert Bosch GmbH and is the basis of the Controller Area Network (CAN) bus. The voltage surge protection makes the device ideal for applications such as automotive, aviation, and industrial control systems.

Overview

The LTC2847CUHF#PBF is a low-power, automotive-grade transceiver designed for the Controller Area Network (CAN) serial communication protocol. It features very robust ESD and voltage surge protection, making it well suited for in-vehicle and industrial applications. The device is capable of supporting one differential pair of CAN transceivers, as described in the CAN Specification 2.0B. The low power consumption of these transceivers make them ideal for use in battery-powered applications. The device has protection features that prevent data loss due to ESD, transients, and other environmental factors that can occur in harsh industrial and automotive environments.

Features

• Low-power low-noise operation
• Very robust ESD and voltage surge protection
• Wide operating temperature range -40°C to 125°C
• Wide AEC-Q100 temperature range -40°C to +125°C
• High EMC immunity to common-mode transient bridged at the CAN-H and CAN-L pins
• Automatic transmission delay
• Control pin allows for easy shutdown

Typical Applications

• Automotive Controller Area Network (CAN)
• AVionics Ethernet
• UDS Protocol
• Industrial control systems
• Robotics
• Battery powered applications

Working Principle

The LTC2847CUHF#PBF operates as an electrical bridge across one differential pair of CAN transceivers, allowing it to transmit and receive digital signals over a single electrical interface. The differential pair will provide an output voltage that is a function of the input voltage. The internal ESD protection allows a maximum line transients up to ±8kV air and ±1.5kV contact discharge.

The LTC2847CUHF#PBF features a high-impedance status (HIZ) mode to reduce the power consumption. It also provides an active pre-emphasis to ensure that the output signals remain robust even under harsh ambient conditions. The transceiver supports two distinctive features, a Transmission Delay (Tsc) and a CAN protocol controller.

The Transmission Delay provides a set time delay on the output signal generated by the device. This is to ensure that all the data is transmitted after the output signal has reached its maximum level. The CAN protocol controller performs the synchronization between nodes and performs data integrity check on all the messages transferred.

The digital control pin of the device allows the user to shut down the output signals and the digital circuit components, reducing the device power consumption to a very minimum level. The device is designed to operate over a wide operating temperature range of -40°C to 125°C and is also available in an automotive AEC-Q100 grade (operating temperature range of -40°C to +125°C).

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