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 and EMI. Additionally, keep the analog input traces short and away from digital signals.
Use a low-impedance transmission line, such as a 50-ohm microstrip or stripline, to route the digital outputs. Terminate the lines with a 50-ohm resistor to match the impedance, and consider using a series resistor to reduce reflections. Also, use a low-skew clock signal to ensure proper data capture.
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 2nd- or 3rd-order Butterworth or Bessel filter is recommended. The filter should be placed close to the analog input pins to minimize noise pickup.
Follow the calibration procedure outlined in the datasheet, which involves setting the internal reference voltage and gain. Additionally, use the SPI interface to configure the device for the desired sampling rate, input range, and output format. Consult the datasheet and application notes for specific guidance on calibration and configuration.
The ADS8402IBPFBT has a maximum junction temperature of 150°C. Ensure good airflow around the device, and consider using a heat sink or thermal pad to dissipate heat. Avoid blocking the airflow around the device, and keep the ambient temperature below 85°C. Monitor the device temperature using the internal temperature sensor or an external thermometer.
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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.
