The MAX3110ECNI requires careful layout and routing to ensure proper operation. Maxim recommends following a star-grounding scheme, keeping analog and digital traces separate, and using a solid ground plane to minimize noise and EMI. A 4-layer PCB with a dedicated ground plane is recommended.
To minimize high-frequency noise on the output, use a low-pass filter with a cutoff frequency above the maximum frequency of interest. A 2nd-order Butterworth filter with a cutoff frequency of 100kHz to 200kHz is recommended. Additionally, use a ferrite bead or a common-mode choke to filter out high-frequency noise on the power supply lines.
The MAX3110ECNI can support cable lengths up to 100 meters (328 feet) at a data rate of 100Mbps. However, the maximum cable length may vary depending on the specific application, cable quality, and noise environment. It's recommended to perform signal integrity analysis and testing to determine the maximum cable length for a specific application.
To ensure reliable operation in high-temperature environments, follow proper thermal design and layout practices. Ensure good airflow around the device, use a heat sink if necessary, and avoid thermal hotspots. The MAX3110ECNI is rated for operation up to 85°C, but derating may be necessary for extended temperature ranges.
The recommended termination resistors for the MAX3110ECNI are 100Ω to 120Ω for the transmitter and 100Ω to 120Ω for the receiver. The exact value may vary depending on the specific application and cable characteristics. It's recommended to perform signal integrity analysis and testing to determine the optimal termination resistors for a specific application.
MAX3110ECNI datasheet
by Maxim Integrated Products
