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 the input signal is properly terminated. Additionally, consider using a series resistor and capacitor to filter out high-frequency noise.
The ADS5444IPFPR supports clock frequencies up to 160 MSPS. However, the maximum clock frequency may vary depending on the specific application and system requirements.
To handle metastability issues, ensure that the clock signal is clean and jitter-free, and consider using a clock domain crossing (CDC) circuit to synchronize the clock signal. Additionally, use a metastability-resistant design approach, such as using a synchronizer or a FIFO, to mitigate the effects of metastability.
To minimize noise and ensure proper operation, follow a star-grounding layout approach, keep analog and digital signals separate, and use a solid ground plane. Additionally, use a low-inductance path for the clock signal and keep the analog input traces short and shielded.
ADS5444IPFPR datasheet
by Texas Instruments
