A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the analog and digital grounds separate and connect them at a single point. Use a 10nF capacitor between VCC and GND for decoupling.
Use a common mode choke or a ferrite bead to filter out high-frequency noise. Ensure the signal lines are properly terminated, and use a shielded cable for the CAN bus. Also, implement a robust error handling mechanism in the microcontroller's firmware.
The maximum cable length depends on the specific application and the type of cable used. As a general guideline, the ISO3082DWRG4 can support cable lengths up to 40 meters at 1 Mbps. However, it's recommended to consult the CAN bus specification and perform signal integrity analysis for the specific application.
Use a metal shield around the device, and ensure the PCB is properly grounded. Add EMI filters or ferrite beads to the signal lines. Implement ESD protection using TVS diodes or ESD protection arrays. Follow proper PCB design and layout guidelines to minimize EMI and ESD susceptibility.
Power up the device in the following sequence: VCC, then VIO, and finally the CAN bus. Ensure the power supplies are stable and within the recommended voltage range before applying the CAN bus signals.
ISO3082DWRG4 datasheet
by Texas Instruments
