A good PCB layout for the ISO3082DWG4 involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the signal traces. TI provides a recommended layout in the datasheet, but it's essential to follow good PCB design practices to ensure optimal performance.
To ensure proper power and decoupling, use a high-quality power supply with low noise and ripple. Decouple the VCC and GND pins with 0.1uF and 10uF capacitors, respectively. Additionally, use a 10uF capacitor on the VCC pin to filter out high-frequency noise.
The ISO3082DWG4 can support data rates up to 100 Mbps, but the actual achievable data rate depends on the specific application, cable length, and noise environment. TI recommends using a data rate of 10 Mbps or less for reliable operation.
To handle common-mode transients and EMI, use a common-mode choke or a ferrite bead on the signal lines. Additionally, use shielding on the cables and ensure good grounding practices to minimize EMI effects.
The recommended termination scheme for the ISO3082DWG4 is a 100-ohm differential termination at the receiver end. This ensures proper signal integrity and minimizes reflections.