A 4-layer PCB with a solid ground plane, separate analog and digital power planes, and a star-configuration for analog and digital grounds is recommended. Additionally, keep the analog and digital signal traces separate and avoid crossing them.
Use a high-quality, low-jitter clock source (e.g., a crystal oscillator) and ensure the clock signal is properly terminated and routed. A clock frequency of 100 MHz or higher is recommended for optimal performance.
Use a FIFO or a buffer to handle the ADC's output data to prevent data loss and ensure continuous data acquisition. Consider using a DMA controller to offload the CPU and improve system performance.
Use shielded cables, keep the analog input signals away from digital signals, and use a low-pass filter or a ferrite bead to filter out high-frequency noise. Additionally, consider using a differential input configuration to reduce common-mode noise.
Use a combination of ceramic and electrolytic capacitors to decouple the power supply. A 10 uF ceramic capacitor and a 10 uF electrolytic capacitor in parallel, placed close to the device, are recommended.
ADS5407IZAY datasheet
by Texas Instruments
