Isolated CAN Interface Based on a 2-Channel Digital Isolator and an Isolated Power Supply Module

This design example demonstrates a compact isolated CAN interface implemented with a 2‑channel digital isolator and a fully integrated isolated power module. The result: fewer components, reduced PCB space, and reliable data transmission up to 1 Mbps. The solution meets CISPR 32 Class B radiated emission standards, making it ideal for EMI‑sensitive industrial and automation environments.
 

Content:

• Overview of CAN-Interface
• Importance of CAN-Bus Isolation
• Description of design example board
• Selection of components
• Reducing common-mode interference with overlapping stitching capacitance
• Testing

Download: SN028