Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital traces separate. Additionally, use a low-ESR capacitor for the AVDD pin and a 0.1uF capacitor for the REF pin. Route the analog input traces away from the digital traces and avoid crossing them over the analog input pins.
Optimize the ADC's performance by selecting the correct gain setting, adjusting the sampling rate, and using the correct input range. Additionally, consider using the built-in calibration feature and averaging multiple conversions to improve accuracy.
Power up the device in the following sequence: AVDD, DVDD, and then the input voltage. Ensure that the input voltage is stable before taking conversions. Also, ensure that the REF pin is tied to a stable voltage reference.
The power-down mode can be entered by setting the PDWN pin high. In this mode, the device consumes minimal power, but the internal reference and oscillator are disabled. When exiting power-down mode, allow for a 10ms settling time before taking conversions.
The internal reference is suitable for most applications, but an external reference can provide better accuracy and stability. When using an external reference, ensure it is stable and has a low output impedance to minimize noise and errors.
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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.
