A good PCB layout practice is to keep the analog and digital grounds separate, use a solid ground plane, and keep the high-frequency signals away from the analog signals. Additionally, use a common-mode choke or a ferrite bead to filter the power supply lines.
Proper termination is crucial for high-speed signals. Use a 50Ω termination resistor in series with the signal line, and a 50Ω termination resistor to ground in parallel with the signal line. This will help to reduce signal reflections and ensure signal integrity.
The recommended power-up sequence is to apply the analog power supply (VCC) first, followed by the digital power supply (VDD). This ensures that the analog circuitry is powered up before the digital circuitry, which helps to prevent any potential latch-up conditions.
The MAX3079EESD+T has a thermal pad on the bottom of the package. Ensure good thermal contact between the thermal pad and the PCB by using a thermal interface material (TIM) such as thermal tape or thermal grease. This will help to dissipate heat efficiently and prevent overheating.
The recommended clock signal quality is a low-jitter, high-frequency clock signal with a frequency of at least 25 MHz. The clock signal should have a rise time of less than 1 ns and a fall time of less than 1 ns. This ensures that the MAX3079EESD+T can accurately sample the input signals.
MAX3079EESD+T datasheet
by Maxim Integrated Products
