A 4-layer PCB with a solid ground plane and a separate analog ground plane is recommended. Keep analog and digital traces separate, and use a common mode filter to reduce noise.
Use a 4th-order Butterworth filter with a cutoff frequency of 1/3 to 1/2 of the Nyquist frequency to minimize aliasing and maximize signal-to-noise ratio.
Use a low-jitter clock source (<100 ps) and a clock frequency that is a multiple of the sampling frequency to minimize aperture jitter and ensure accurate sampling.
Use a FIFO or a DDR memory to handle the high-speed digital output data, and consider using a data serialization/deserialization scheme to reduce the number of output pins.
Use a combination of ceramic and electrolytic capacitors to decouple the power supply, with a 10uF ceramic capacitor closest to the device and a 10uF electrolytic capacitor further away.
ADS62P45IRGCT datasheet
by Texas Instruments
