PCM3002EG - Texas Instruments

PCM3002EG Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the PCM3002EG?
  The recommended power-up sequence is to apply VCC first, followed by AVDD, and then DVDD. This ensures that the internal voltage regulators are powered up correctly.
• How do I optimize the analog input impedance for the PCM3002EG?
  To optimize the analog input impedance, use a series resistor (Rs) and a capacitor (Cs) in parallel with the input signal. The values of Rs and Cs depend on the specific application and signal frequency.
• What is the maximum clock frequency that can be used with the PCM3002EG?
  The maximum clock frequency for the PCM3002EG is 256 fs (fs = sample frequency). However, it's recommended to use a clock frequency that is 4-6 times the sample frequency to ensure proper operation.
• How do I handle clock jitter when using the PCM3002EG?
  To minimize clock jitter, use a high-quality clock source, such as a crystal oscillator, and ensure that the clock signal is properly terminated and filtered. Additionally, use a clock jitter attenuator or a phase-locked loop (PLL) to further reduce jitter.
• What is the recommended layout and routing for the PCM3002EG?
  To minimize noise and ensure proper operation, follow a star-grounding layout, keep analog and digital signals separate, and use a solid ground plane. Also, route the clock signal as a differential pair and use a shielded cable for the analog input signals.