Texas Instruments provides a recommended layout and routing guide in the ADS8883IDGSR Evaluation Module User's Guide (SLAU445). It's essential to follow this guide to ensure optimal performance and minimize noise coupling.
The ADS8883IDGSR has high-speed digital outputs that require careful handling to avoid signal degradation and noise coupling. Use a low-impedance transmission line, keep the output traces short, and use a termination resistor to match the impedance of the transmission line.
Use a low-pass filter with a cutoff frequency below the Nyquist frequency (half the sampling rate) to remove high-frequency noise and aliasing. A simple RC filter or a more complex active filter can be used, depending on the specific application requirements.
Use a stable and accurate clock source, and ensure that the clock signal is properly routed and terminated. Also, use the SYNC pin to synchronize the conversion process with other devices in the system, if necessary.
The power-on sequence is critical to ensure proper operation of the ADS8883IDGSR. Power on the analog supply (AVDD) first, followed by the digital supply (DVDD), and finally the clock signal. This sequence helps prevent latch-up and ensures proper initialization.
ADS8883IDGSR datasheet
by Texas Instruments
