A good PCB layout for the LTC2202CUK involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the distance between the ADC and the analog signal sources. A 4-layer PCB with a dedicated analog ground plane is recommended.
To optimize the performance of the LTC2202CUK in noisy environments, use a low-pass filter at the input, use a shielded cable for the analog input, and consider using a common-mode filter or a ferrite bead to reduce electromagnetic interference (EMI).
The maximum clock frequency for the LTC2202CUK is 100 MHz. However, the actual clock frequency may be limited by the specific application and the quality of the clock signal.
Metastability in the LTC2202CUK can be handled by using a synchronizer circuit or a metastable-resistant flip-flop to resynchronize the data and clock signals. Additionally, using a clock signal with a low jitter and a high-quality clock source can help reduce the likelihood of metastability.
The recommended power-up sequence for the LTC2202CUK is to power up the analog supply (AVCC) first, followed by the digital supply (DVCC), and then the clock signal. This ensures that the analog circuitry is powered up before the digital circuitry.