A 4-layer PCB with a solid ground plane and a separate analog ground plane is recommended. Keep analog and digital signals separate, and use a common mode filter to reduce noise.
The analog input impedance should be matched to the source impedance to minimize signal reflections. A 1 kΩ to 10 kΩ input impedance is recommended, depending on the signal source.
The recommended clock frequency is between 10 MHz to 100 MHz, depending on the application requirements. A higher clock frequency can improve SNR, but may also increase power consumption.
The digital output data is in 14-bit or 16-bit binary two's complement format. Use a FIFO or a buffer to handle the data, and consider using a digital signal processor or a microcontroller to process the data.
The power consumption depends on the clock frequency, sampling rate, and operating mode. Typical power consumption is around 350 mW at 100 MSPS, but can be as low as 150 mW at 10 MSPS.
ADS42LB69IRGC25 datasheet
by Texas Instruments
Findchips
