A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the input and output traces short and away from each other to minimize noise coupling. Use a common-mode choke or a ferrite bead to filter the input power lines.
The MAX2685EEE+ requires a bias voltage of 3.3V to 5V on the VCC pin. Ensure the bias voltage is stable and noise-free. A decoupling capacitor of 0.1uF to 1uF should be placed close to the VCC pin to filter out high-frequency noise.
The MAX2685EEE+ can handle input power up to +30dBm (1W). However, it's recommended to operate the device at a maximum input power of +20dBm (0.1W) to ensure optimal performance and reliability.
The MAX2685EEE+ has internal matching networks for optimal performance at 2.4GHz and 5.8GHz. For other frequency bands, external matching components may be required. Use a network analyzer to optimize the matching network for the desired frequency band.
The MAX2685EEE+ is specified to operate from -40°C to +85°C. However, optimal performance is achieved between 0°C to +70°C. Operating the device outside the recommended temperature range may affect its performance and reliability.
MAX2685EEE+ datasheet
by Maxim Integrated Products
