Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general high-speed PCB design guidelines, such as using a solid ground plane, minimizing trace lengths, and using decoupling capacitors to reduce noise and ringing.
The ADS61B29IRGZT has high-speed digital outputs that require careful handling to avoid signal degradation and electromagnetic interference (EMI). Use transmission lines, such as 50-ohm microstrip or stripline, and terminate them with 50-ohm resistors to match the output impedance of the device.
The ADS61B29IRGZT has a high-impedance analog input, so it's essential to filter the input signals to reduce noise and aliasing. Use a low-pass filter with a cutoff frequency below the Nyquist frequency (half the sampling rate) to remove high-frequency noise and aliasing.
The ADS61B29IRGZT requires a stable power supply and proper decoupling to operate correctly. Use a low-noise power supply, and decouple the device with 0.1-uF and 10-uF capacitors in parallel, placed as close as possible to the power pins.
The ADS61B29IRGZT has a maximum sampling rate of 250 MSPS, but the actual achievable sampling rate depends on the system design, including the analog input bandwidth, digital output data rate, and system clock frequency.
ADS61B29IRGZT datasheet
by Texas Instruments
