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, use a common mode filter and a ferrite bead to filter out high-frequency noise.
Calibration involves adjusting the offset and gain of the ADC. Use the internal calibration feature by setting the CAL pin high, and then use the CALDAC registers to adjust the offset and gain. You can also use external calibration methods, such as using a precision voltage reference and a calibration resistor.
Power up the analog supply (AVDD) first, followed by the digital supply (DVDD). Then, apply the clock signal and finally, bring the reset pin (RESET) high. This sequence ensures that the ADC is properly initialized and prevents latch-up.
Use a low-jitter clock source, such as a crystal oscillator or a high-quality clock generator. Route the clock signal as a differential pair, and use a clock buffer or a clock distribution network to minimize skew and jitter. Also, use a clock capacitor to filter out high-frequency noise.
Use a low-impedance, low-noise analog source, such as a precision voltage reference or a low-noise amplifier. Use a buffer amplifier or an op-amp to drive the analog input pins, and ensure that the input impedance is matched to the ADC's input impedance. Also, use a filter or a capacitor to filter out high-frequency noise.
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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.
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