CS4954-CQZ datasheet by Cirrus Logic

CS4954-CQZ Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the CS4954-CQZ?
  The recommended power-up sequence is to apply VCC first, followed by VDD, and then the analog power supplies (AVCC and DVCC). This ensures proper device operation and prevents latch-up.
• How do I optimize the performance of the CS4954-CQZ in a noisy environment?
  To optimize performance in a noisy environment, ensure proper grounding and shielding of the device, use a low-pass filter on the analog input, and consider using a ferrite bead or common-mode choke on the power supply lines.
• What is the maximum allowed capacitance on the analog input pins?
  The maximum allowed capacitance on the analog input pins is 10nF. Exceeding this value may affect the device's performance and stability.
• Can I use the CS4954-CQZ with a separate analog and digital power supply?
  Yes, the CS4954-CQZ can be used with separate analog and digital power supplies. However, ensure that the analog power supply (AVCC) is decoupled from the digital power supply (DVCC) using a ferrite bead or inductor to prevent noise coupling.
• What is the recommended layout and routing for the CS4954-CQZ?
  The recommended layout and routing for the CS4954-CQZ involves keeping analog and digital traces separate, using a solid ground plane, and minimizing trace lengths and vias. Refer to the datasheet for more detailed guidelines.