Texas Instruments provides a recommended layout and routing guide in the ADS7885SDBVR evaluation module user's guide (SLAU445). It's essential to follow this guide to ensure proper operation and minimize noise and interference.
The ADS7885SDBVR has high-speed digital outputs that require careful handling to avoid signal degradation and noise. Use transmission lines, terminate the lines properly, and consider using series termination resistors to minimize reflections and ringing.
The ADS7885SDBVR requires a clean and stable power supply. Use a low-noise, low-dropout regulator (LDO) and decouple the power pins with high-quality capacitors. Ensure the power supply can handle the device's current requirements, especially during high-frequency conversions.
Optimize the analog input circuitry by using a low-pass filter to remove high-frequency noise, and consider using a buffer amplifier to drive the analog input pins. Ensure the input signal is within the specified voltage range and impedance.
The ADS7885SDBVR can use an internal clock or an external clock source. For best performance, use a high-quality, low-jitter external clock source, such as a crystal oscillator or a clock generator. Ensure the clock frequency is within the specified range.
ADS7885SDBVR datasheet
by Texas Instruments
