Texas Instruments provides a layout guide in the datasheet, but it's recommended to follow a star-grounding scheme, keep analog and digital grounds separate, and use a solid ground plane to minimize noise. Additionally, keep the analog input traces short and away from digital signals.
Use a low-inductance, high-frequency-capable PCB material, and consider using a ground plane or shield around the digital output traces. Also, use a series termination resistor (e.g., 22-33 ohms) at the output of the ADC to reduce reflections and EMI.
Power up the analog supply (AVDD) first, followed by the digital supply (DVDD), and then the clock signal. This ensures that the internal analog and digital circuits are properly initialized and avoids latch-up or other issues.
The ADS7952SRHBR has an internal calibration circuit that can be enabled through the CAL pin. Apply a known input voltage to the ADC, and then toggle the CAL pin to initiate the calibration process. The ADC will adjust its internal gain and offset to achieve optimal accuracy and linearity.
The maximum clock frequency for the ADS7952SRHBR is 20 MHz. Using a higher clock frequency can result in increased power consumption, reduced accuracy, and potential issues with metastability. However, using a higher clock frequency can also increase the throughput and sampling rate of the ADC.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
