Ensure you have two separate 5.1kΩ resistors (one on CC1 to GND, one on CC2 to GND). Never tie CC1 and CC2 together to a single resistor.
Standard manufacturer brief sheets often omit critical peripheral requirements. To prevent audio clipping and power-on pops, ensure your schematic matches these corrected pin constraints:
Place a ferrite bead (e.g., 600 ohms at 100MHz) on the VBUS 5V input line before it hits the voltage regulators to filter out high-frequency switching noise from the host device. Fix 3: Fixing Audio Distortion and Left/Right Crosstalk Cx31993 Datasheet Fix
: Using 2.2 µF on the VOUT_REF pin (pin 11). Fix : Use 1 µF ±10% X7R – larger values cause pop noise on plug-in due to slow common mode settling.
Must be tied to 1.8V or 3.3V depending on your host logic level. Add a 0.1µF ceramic capacitor as close to the pin as possible. Ensure you have two separate 5
What specific (Windows, Android, iOS) are you connecting to?
and GND pins. Often, budget implementations skip these, causing audio-to-USB noise, or "chirping." Adding these improves the signal-to-noise ratio. To prevent audio clipping and power-on pops, ensure
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