Cx31993 Datasheet Fix Better May 2026

While you cannot legally download the full CX31993 datasheet from Conexant, you can download the Linux kernel source code. The kernel driver (sound/usb/quirks.c) contains the reverse-engineered register map. This is your de facto datasheet.

To get a better fix for your dongle:

The CX31993 is not a bad chip; it is a great chip trapped behind bad documentation and lazy OEM integration. With these fixes, your $10 dongle will outperform most $50 "audiophile" portable DACs.

Finding a formal datasheet for the Synaptics Conexant CX31993

can be difficult as it is often proprietary, but several community resources and technical reviews provide the essential parameters and implementation details needed to "fix" or optimize its performance. Technical Specifications & Performance Based on documentation from manufacturers like Concept Kart cx31993 datasheet fix better

, the chip is a Class G amplifier designed for high-resolution audio over USB-C. DAC Sampling Rate : Up to 32-bit / 384kHz. Signal-to-Noise Ratio (SNR)

: Typically >128dB (chip spec), though implementation results like the JCALLY JM6E report around 117dB. Dynamic Range (DNR) Power Output (Thrust) : Roughly 65mW (often tested at 32Ω). Distortion (THD+N) : ~0.0003% (-95dB). ADC Recording Rate : Supports up to 24-bit / 96kHz for microphone input. Common Implementation & "Fixes"

If you are looking to improve or fix a CX31993-based device, consider these community findings: Noise Filtering : Developers at the Framework Community

have noted high-frequency noise (>200kHz) in some implementations. Since it is a Class G amp, adding a low-pass filter to the output can help clean up ultrasonic artifacts that may interfere with sensitive equipment like oscilloscopes. External Amplification While you cannot legally download the full CX31993

: While the chip is capable, pairing it with an external Op-Amp (like the

) is a common "better" design found in higher-end dongles like the JCALLY JM6 Pro to increase driving power for high-impedance headphones. Hardware ID : The device typically identifies as

in system logs, which can be useful for driver troubleshooting or firmware patching in Linux/Android environments. Build Quality Issues

: Reviewers often note that while the chip is solid, the thin 8-strand silver-plated wires used in many budget dongles are prone to internal breakage. If your device is cutting out, the "fix" is often resoldering or replacing the fragile cable rather than the chip itself. Community & Documentation Links Any link to the cx31993 datasheet? The CX31993 is not a bad chip; it

Because the datasheet doesn't specify analog ground separation, cheap dongles create hiss when the laptop is charging.

The Hardware Fix:

Many users report that the CX31993 works flawlessly on a Pixel phone but crackles on a Samsung S22.

The Fix:

If your CX31993 dongle is buzzing, disconnecting, or sounding "thin," a software fix usually exists. Do not throw the dongle away.

Once the bugs are fixed, how do you make the CX31993 sound better than a $200 portable DAC?