WM8731SEDS/V - Cirrus Logic

WM8731SEDS/V Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the WM8731?
  The recommended power-up sequence is to apply the analog power supply (AVDD) first, followed by the digital power supply (DVDD), and then the clock signal. This ensures that the analog circuitry is powered up before the digital circuitry.
• How do I configure the WM8731 for master clock mode?
  To configure the WM8731 for master clock mode, set the MCLK pin to the desired clock frequency, and set the BCLK pin to the desired bit clock frequency. Then, set the LRCLK pin to the desired left-right clock frequency. Finally, set the M/S pin to '1' to enable master clock mode.
• What is the maximum input voltage for the analog input pins?
  The maximum input voltage for the analog input pins is 2.5V. Exceeding this voltage may cause damage to the device.
• How do I reduce EMI emissions from the WM8731?
  To reduce EMI emissions from the WM8731, use a ground plane, keep the analog and digital grounds separate, and use a common mode choke or ferrite bead on the analog input lines. Additionally, use a shielded cable for the digital interface and keep the clock signal lines as short as possible.
• What is the recommended layout for the WM8731?
  The recommended layout for the WM8731 is to keep the analog and digital circuits separate, with the analog circuitry placed near the analog input pins and the digital circuitry placed near the digital output pins. Use a star-grounding scheme and keep the power supply lines as short as possible.