1. General description
The TJA1052i is a high-speed CAN transceiver that provides a galvanically isolated
interface between a Controller Area Network (CAN) protocol controller and the physical
two-wire CAN bus. The TJA1052i is specifically targeted at Electric Vehicles (EV) and
Hybrid Electric Vehicles (HEV), where galvanic isolation barriers are needed between the
high- and low-voltage parts.
Safety: Isolation is required for safety reasons, eg. to protect humans from electric shock
or to prevent the electronics being damaged by high voltages.
Signal integrity: The isolator uses proprietary capacitive isolation technology to transmit
and receive CAN signals. This technology enables more reliable data communications in
noisy environments, such as high-voltage battery management systems or the drive and
regeneration systems in EVs and HEVs.
Performance: The transceiver is designed for high-speed CAN applications in the
automotive industry, supplying the differential transmit and receive capability to a CAN
protocol controller in a microcontroller. Integrating the galvanic isolation along with the
transceiver in the TJA1052i removes the need for stand-alone isolation. It also improves
reliability and system performance parameters such as loop delay.
The TJA1052i belongs to the third generation of high-speed CAN transceivers from NXP
Semiconductors, offering significant improvements over first- and second-generation
devices. It offers improved ElectroMagnetic Compatibility (EMC) and ElectroStatic
Discharge (ESD) performance, and also features ideal passive behavior to the CAN bus
when the transceiver supply voltage is off.
The TJA1052i implements the CAN physical layer as defined in ISO 11898-2:2016 and
SAE J2284-1 to SAE J2284-5. This implementation enables reliable communication in the
CAN FD fast phase at data rates up to 5 Mbit/s.
The TJA1052i is an excellent choice for all types of automotive and industrial CAN
networks where isolation is required for safety reasons or to enhance signal integrity in
noisy environments.
2. Features and benefits
2.1 General
Isolator and Transceiver integrated into a single SO16 package, reducing board space
ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5 compliant
Timing guaranteed for data rates up to 5 Mbit/s in the CAN FD fast phase
Flawless cooperation between the Isolator and the Transceiver
TJA1052i
Galvanically isolated high-speed CAN transceiver
Rev. 5 — 29 January 2018 Product data sheet
CAN
