Cx31993 Datasheet Fix Hot 'link' Jun 2026

High heat dissipation and occasional static/hiss when connected to sensitive IEMs. Why Does the CX31993 Get Hot?

If you don't want to solder, replace your dongle. Not all CX31993 devices are created equal.

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. cx31993 datasheet fix hot

The Conexant has established itself as one of the most popular low-cost, high-performance USB-C DAC chips on the market. Powering crowd favorites like the JCALLY JM6E and various "CX-Pro" budget dongles, this chip delivers an impressive 32-bit/384kHz sampling rate , a signal-to-noise ratio (SNR) exceeding 128dB , and clean native DSD support.

You use 8-16 Ohm IEMs at high volume for hours. In that case, buy a dongle with a discrete op-amp (e.g., the JCALLY JM20 or the Apple USB-C dongle, which runs ice cold). Not all CX31993 devices are created equal

Page 12 of the OEM design guide (leaked) explicitly states: "The exposed thermal pad (EPAD, Pin 0) MUST be soldered to a continuous ground plane with at least 6 thermal vias to the backside copper."

: If the dongle becomes "burning hot" almost instantly, it likely has a manufacturing defect or internal short. In these cases, it is safer to return the unit for a replacement. Common Specs & Performance Specification Sampling Rate 32-bit / 384kHz Power Output My solution to overheating DAC dongles - HifiGuides Forums The Conexant has established itself as one of

Below is a guide addressing the technical specifications and common "hot" fixes for this chip.

Knowing this, I can suggest if you need a specialized firmware fix or simply an impedance adapter. Audio Expansion Card - CX31993 Datasheet