A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the analog and digital grounds separate and connect them at a single point. Use a ferrite bead or a 10-ohm resistor in series with the VCC pin to reduce high-frequency noise.
Use a high-quality, low-ESR capacitor (e.g., 10uF ceramic) between VCC and GND, and a 100nF capacitor between AVCC and AGND. Place these capacitors as close to the device as possible. Ensure the power supply is stable and has a low ripple voltage.
A high-quality, low-jitter clock source is recommended. A crystal oscillator or a high-stability clock source (e.g., a TCXO) is preferred. Avoid using the internal clock source, as it may not provide the required accuracy and stability.
Use a high-quality, low-noise analog input signal. Ensure the analog input voltage is within the recommended range (0 to VREF). Use a low-pass filter or a buffer amplifier to reduce noise and improve signal integrity. Avoid switching noise and digital signals near the analog input pins.
Use a heat sink or a thermal pad to dissipate heat. Ensure good airflow around the device. Avoid blocking airflow or using a metal can or shield that can trap heat. Use a thermal interface material (e.g., thermal tape or thermal grease) to improve heat transfer.
DS36C279M/NOPB datasheet
by Texas Instruments
