Cx31993 | Datasheet Fix Hot

When pushing high-resolution audio files (like DSD or 32-bit PCM), the digital core processes massive amounts of data. Simultaneously, the integrated class-G or class-H amplifier scales up power to drive lower impedance headphones. This dual-action demands significant current drawn from the 5V USB bus, generating localized thermal energy. Hardware Indicators of Overheating

According to available datasheets and manufacturer references, the CX31993 boasts a range of high-end specifications. It supports PCM audio at up to , delivering an impressive 128dB signal-to-noise ratio (SNR) with total harmonic distortion (THD+N) rated at less than 0.0003% . This performance rivals many expensive desktop DACs from just a few years ago. In addition, the CX31993 supports a wide range of headphone impedances from 16Î© to 600Î© , achieving its maximum output power of approximately 65mW into a 16Î© load .

Since an official datasheet is hard to find, technical communities rely on these verified parameters: 32-bit / 384kHz SNR (Signal-to-Noise Ratio): >128dB DNR (Dynamic Range): >120dB THD+N: 0.0003% (-95dB) Output Power: 65mW (dual channel) Amplifier Class: Class G Why it Gets "Hot" (Common Causes)

April 21, 2026 Subject: Investigation into thermal performance issues of the Conexant CX31993 USB DAC chip and the lack of public thermal mitigation guidelines in its datasheet. cx31993 datasheet fix hot

To avoid getting a unit that falls apart or has poor internal soldering, buy your CX31993 dongle from recognized budget audio brands such as JCALLY (e.g., the JM6 or JM7 lines), Abigail , or GraveAudio . JCALLY JM6E CX31993 DAC - Reviews - Head-Fi

Before fixing thermal issues, it helps to understand what the chip is doing under the hood. The

The official Conexant (now Synaptics) CX31993 datasheet lists the chip as a "high-performance, low-power audio codec." The keyword is low power . The sheet claims a typical current consumption of for the digital-to-analog conversion. When pushing high-resolution audio files (like DSD or

Give you tips on work best with this chip. Recommend a cheap 3.5mm impedance adapter to test. Just let me know how you'd like to proceed! Any link to the cx31993 datasheet? - Facebook

Right-click, open , and navigate to Power Management .

Issue: PLL staying active.

Cut a tiny piece of high-conductivity thermal pad (0.5mm thickness is usually ideal) and place it directly on top of the CX31993 chip.

If you are prototyping a board using the CX31993 datasheet schematics, your layout is critical to heat management.

is a popular, budget-friendly USB-C DAC chip found in many "noname" and branded dongles like the Audiocular CX Pro In addition, the CX31993 supports a wide range