Cx31993 Datasheet Fix — Confirmed

The Conexant CX31993 Go to product viewer dialog for this item.

The Conexant is a popular, high-performance USB-C DAC chip frequently used in budget "dongle" DACs like the Venture Electronics Abigail JCALLY JM7 Concept Kart

Fix 1: Resolving VREF and AVDD Decoupling Issues (Fixes Hissing & Pops) Cx31993 Datasheet Fix

Understanding the Cx31993 Datasheet: Common Issues and Fixes

Open Device Manager -> Sound, video and game controllers. Look for "USB Audio Device" or "Conexant CX31993". Right-click -> Update Driver -> "Browse my computer..." -> "Let me pick from a list..." -> Select "USB Audio Device" (generic driver) or a Conexant driver if it appears. The Conexant CX31993 Go to product viewer dialog

Enumeration failures are frequently caused by signal reflections along the USB differential pair due to mismatched impedance.

Integrated USB Audio Class 2.0 SOC with a built-in DAC and Class G headphone amplifier. Right-click -> Update Driver -> "Browse my computer

When designing a PCB footprint for the CX31993 (typically a 24-pin or 32-pin QFN package), implement the following corrections to bypass datasheet layout errors. Audio Output Inversion Fix

However, because this chip is frequently used in budget-tier or "no-name" Chinese USB-C dongles, the is rarely provided to consumers, leading to significant troubleshooting hurdles when compatibility issues arise. Users often report issues with Windows compatibility, background noise, or microphone malfunction.

Add a passive RC low-pass filter (Ferrite bead + 100pF capacitor to ground) on the HPL and HPR lines. This blocks radio frequency interference (RFI) from acting as an antenna through the headphone cable. 4. Troubleshooting Workflow Guide

The following code snippet, adapted from expert recommendations, shows the correct order for initializing the chip's core functions: