The recommended power-up sequence is to apply the analog power supply (AVDD) first, followed by the digital power supply (DVDD), and then the clock signal. This ensures proper initialization of the device.
To optimize the analog input impedance, use a low-impedance source, such as a buffer amplifier, and ensure that the input signal is properly terminated. Additionally, consider using a differential input configuration to reduce common-mode noise.
The ADS5444MPFPEP supports clock frequencies up to 160 MSPS. However, the maximum clock frequency may vary depending on the specific application and system requirements.
Metastability issues can be handled by using a synchronizer circuit or a metastable-resistant flip-flop to resynchronize the data output. Additionally, consider using a clock domain crossing (CDC) circuit to ensure proper data transfer between clock domains.
To minimize noise and ensure proper operation, follow a star-grounding scheme, keep analog and digital signals separate, and use a solid ground plane. Additionally, consider using a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
ADS5444MPFPEP datasheet
by Texas Instruments
