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 low-ESR capacitor for power decoupling and place it close to the device.
Use a low-jitter clock source (<100 ps) and ensure the clock signal is properly terminated. The clock input should be AC-coupled and have a 50-ohm termination. A clock buffer or repeater can be used to improve signal integrity.
Use a differential analog input configuration to minimize noise and improve common-mode rejection. Ensure the analog input signals are properly terminated and matched to the device's input impedance (100 ohms differential).
Use a low-skew, high-speed digital interface (e.g., LVDS or CMOS) to transmit the digital output data. Ensure proper signal termination and use a receiver with a high input impedance to minimize signal degradation.
Power up the device in the following sequence: AVDD, DVDD, and then CLKIN. Ensure a minimum power-up time of 10 ms and a power-down time of 1 ms to prevent latch-up.
ADS5402IZAY datasheet
by Texas Instruments
