Maximum sampling rate of 384 kHz | Volume adjustments and an equalizer | Signal-to-Noise Ratio (SNR) of -128dB | Output of 2 Vrms. Concept Kart
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If you’ve ever tried to design with the —the popular USB-C DAC chip found in many dongles—you’ve likely hit a wall. The official datasheet is brief, often confidential, and missing key details for robust implementation. cx31993 datasheet fix better
The datasheet specifies a wide operating voltage, but the internal charge pump requires clean decoupling. The chip shares its digital power line (V_BUS) with the analog power amplifier section. Without external filtering, high-frequency USB switching noise leaks into the audio path, causing an audible hiss. Common Faults and How to Fix Them
Use bit-perfect media players like UAPP (USB Audio Player Pro) , Hiby Music , or Neutron Music Player .
Better conductivity, lower resistance, and dramatically improved shielding against electromagnetic interference (EMI). 2. USB-C Port Cleaning Maximum sampling rate of 384 kHz | Volume
However, because these dongles are built to a very aggressive price point, the implementation of the DAC leaves room for optimization. Because there is no publicly accessible detailed datasheet for the CX31993, the DIY and audiophile communities have reverse-engineered the chip's capabilities and quirks.
Unlike open chips from Texas Instruments or ESS, the CX31993 is a "black box." Because Conexant focuses on OEM contracts (laptop manufacturers like Dell, HP, and Lenovo), they do not publish public datasheets.
This is the opposite problem of low volume. Users with ultra-sensitive multi-driver IEMs report hearing a constant hiss or white noise in the background. This is often a . The official datasheet is brief, often confidential, and
Open your Digital Audio Workstation (DAW) or media player, select ASIO4ALL as your output, and map the channels directly to the CX31993 endpoints. This reduces latency to under 5ms and tightens sub-bass transients. Verdict: Is the CX31993 Still Worth It?
Because the CX31993 is naturally bright, it can make sharp IEMs (like many KZ models) sound fatiguing.