PCM3002E datasheet by Texas Instruments

PCM3002E Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the PCM3002E?
  The recommended power-up sequence is to apply VCC first, followed by AVCC, and then DVCC. This ensures that the internal voltage regulators are powered up correctly.
• How do I optimize the analog input impedance for the PCM3002E?
  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, but a good starting point is Rs = 1 kΩ and Cs = 10 nF.
• What is the maximum clock frequency for the PCM3002E?
  The maximum clock frequency for the PCM3002E is 256 fs (fs = sampling frequency). However, the actual clock frequency may be limited by the specific application and the quality of the clock signal.
• How do I handle clock jitter in the PCM3002E?
  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 the internal clock jitter attenuator (CJA) feature to reduce jitter.
• What is the recommended layout and routing for the PCM3002E?
  To minimize noise and ensure proper operation, follow these layout and routing guidelines: keep analog and digital signals separate, use a solid ground plane, and route clock and data signals away from analog signals.