Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep analog and digital signals separate. Use short, direct traces for analog signals, and avoid crossing digital signals over analog signals. Also, decouple the power supply with a 10uF capacitor and a 100nF capacitor in parallel.
Use the ADS114S08's built-in calibration modes to optimize gain and offset. The device has a self-calibration mode that can be triggered through the SPI interface. Additionally, you can use the device's internal voltage reference to calibrate the gain and offset. Consult the datasheet and application notes for more information.
Power up the device in the following sequence: AVDD, DVDD, and then the analog input voltage. Ensure that the power supplies are stable and within the recommended operating range before applying the analog input voltage.
Use the SPI interface to put the device into power-down mode by setting the PDWN pin high. In power-down mode, the device consumes minimal power. When exiting power-down mode, ensure that the power supplies are stable before taking the device out of reset.
Use a shielded enclosure, and ensure that the PCB is designed with EMI and EMC in mind. Use a common-mode choke or ferrite bead to filter the power supply lines, and consider using a pi-filter or common-mode filter on the analog input lines.
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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.
