CS4351-CZZ datasheet by Cirrus Logic

CS4351-CZZ Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the CS4351-CZZ?
  The recommended power-up sequence is to apply VDD first, followed by VDDIO, and then the clock signal. This ensures proper device initialization and prevents potential latch-up conditions.
• How do I configure the CS4351-CZZ for master clock mode?
  To configure the CS4351-CZZ for master clock mode, set the MCLK pin as the clock source, and ensure that the MCLK frequency is within the recommended range of 10-50 MHz. Additionally, set the BCLK and LRCLK pins as outputs, and configure the device for the desired audio format.
• What is the purpose of the PDN pin, and how should it be connected?
  The PDN (Power Down) pin is an active-low input that allows the device to enter a low-power state. Connect the PDN pin to a logic low signal to enable the device, and to a logic high signal to disable the device and reduce power consumption.
• How do I optimize the CS4351-CZZ for low power consumption?
  To optimize the CS4351-CZZ for low power consumption, ensure that the device is operated at the lowest possible clock frequency, disable unused features, and use the power-down mode when not in use. Additionally, consider using a lower voltage supply and optimizing the analog circuitry for minimal power consumption.
• What is the recommended layout and routing for the CS4351-CZZ?
  The recommended layout and routing for the CS4351-CZZ involves keeping the analog and digital signal paths separate, using a solid ground plane, and minimizing the length of the clock signal traces. Additionally, ensure that the power supply decoupling capacitors are placed close to the device.