Texas Instruments provides a recommended layout and routing guide in the ADS7854IRTER evaluation module user's guide (SLAU445). It's essential to follow this guide to ensure proper operation and minimize noise and interference.
The CLKIN input should be driven by a low-jitter, high-frequency clock source. A clock signal with a frequency of 10 MHz to 50 MHz is recommended. Additionally, the clock signal should be routed close to the device and terminated with a 50-ohm resistor to minimize reflections and noise.
A multi-point decoupling scheme is recommended, with 0.1 μF and 10 μF capacitors placed close to the device's power pins. This helps to filter out high-frequency noise and ensure stable operation.
Texas Instruments provides an ADS7854IRTER configuration tool (ADC Config Tool) that helps to optimize the device's settings for specific applications. The tool can be downloaded from the TI website and used to generate a configuration file that can be loaded into the device.
The maximum conversion rate of the ADS7854IRTER is 1 MSPS. The power consumption of the device increases with the conversion rate, so it's essential to optimize the conversion rate for the specific application to minimize power consumption.