A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the analog and digital signal traces separate and avoid crossing them over each other.
Use a low-ESR capacitor (e.g., 0.1 μF) between VCC and GND, and a 10 μF capacitor between VCC and AVCC. Ensure the power supply is clean and regulated, and use a ferrite bead or inductor to filter out high-frequency noise.
The SCAN921226HSM/NOPB supports clock frequencies up to 100 MHz, but the actual frequency limit may vary depending on the specific application and PCB layout.
Set the ADC clock to 10 MHz or less, and use the internal reference voltage (VREF) or an external reference voltage. Ensure the analog input signals are properly filtered and buffered, and use the correct gain setting for the desired input range.
The recommended operating temperature range is -40°C to 85°C, but the device can operate up to 125°C with reduced performance and reliability.
SCAN921226HSM/NOPB datasheet
by Texas Instruments
