The MAX14882 isolated high-speed CAN transceiver improves communication and safety by integrating galvanic isolation between the CAN-protocol controller-side (TDX, RXD) of the device and the physical wires of the CAN network (CANH, CANL) cable-side/bus-side of the transceiver. Isolation improves communication by breaking ground loops and reduces noise where large differences in ground potentials exists between ports. The MAX14882 provides up to 5000V_RMS (60s) of galvanic isolation and a continuous working voltage of up to 848V_RMS, while operating at the maximum high-speed CAN data rate of 1Mbps.

The MAX14882 features additional integrated protection for robust communication. The ±25V receiver input common-mode range exceeds the ISO 11898 specification requirement of -2V to +7V. Additionally, the CANH and CANL IOs are fault tolerant up to ±54V and are protected from electrostatic discharge (ESD) up to ±15kV to GNDB on the bus-side, as specified by the Human Body Model (HBM).

Interfacing with CAN-protocol controllers is simplified by the wide 3.0V to 5.5V supply voltage range (V_DDA) on the controller-side of the device. The supply voltage range for the CAN bus-side of the device is 4.5V to 5.5V (V_DDB). An integrated transformer driver and LDO can be used, with an external transformer, to generate the isolated supply for V_DDB.

Field installation and troubleshooting are simplified by the polarity select (POL) input. POL swaps the functions of the CANH and CANL IOs, allowing for simple software correction of cross-wired bus cables in the field.

The MAX14882 operates over the -40°C to +125°C temperature range and is available in a 16-pin wide SOIC (W SOIC) package with 8mm of creepage and clearance.

Applications

• Building Automation
• HVAC
• Industrial Controls
• Switching Gear