Because the datasheet doesn't specify analog ground separation, cheap dongles create hiss when the laptop is charging.
The Hardware Fix:
A common issue with this chip is audible popping or static when the system suspends the codec to save power.
The official (leaked) partial datasheet suggests register 0x06 controls muting during rate switching.
Better Setting: Configure your OS to use the same sample rate across all apps.
Tell me which specific section of your CX31993 datasheet appears wrong (e.g., "pinout," "power consumption," "I2S timing"), and I will give you the exact corrected values to replace.
The Go to product viewer dialog for this item. (also known as the Conexant CX Pro
) has become a staple in the audiophile community for its exceptional performance-to-price ratio. Whether you are using it in a JCALLY JM6E or a Signature Acoustics dongle, this chip provides high-fidelity audio that often rivals much more expensive equipment.
This article serves as a comprehensive guide to its technical specifications and troubleshooting "fixes" to help you get the most out of your Go to product viewer dialog for this item. -based device. Technical Datasheet Overview Go to product viewer dialog for this item.
is a high-performance standalone DAC (Digital-to-Analog Converter) decoder chip designed for USB-C to 3.5mm/4.4mm adapters. It is frequently paired with independent amplifiers like the MAX97220 to boost its power output. Specification Detail DAC Chip Conexant CX31993 (CX Pro Resolution Up to 32-bit / 384kHz PCM SNR Dynamic Range (DNR) THD + N 0.0003% (-95dB) Output Power 65mW @ 32Ω (typically 2Vrms) Microphone Support ADC 24-bit / 96kHz recording DSD Support DSD 64/128 (PCM) Common Issues and How to "Fix" Them 1. Low Volume or "Capped" Output Users often find that the
sounds quieter on Android compared to PCs. This is usually due to the Android system's internal volume mixer capping the output to protect your hearing. The Fix: Use a "Bit-Perfect" music player like USB Audio Player Pro (UAPP) cx31993 datasheet fix better
, Neutron Music Player, or Hiby Music. These apps bypass the Android system's audio stack and allow you to access the hardware-level volume control of the DAC.
Alternative: In Developer Options, ensure "Disable Absolute Volume" is checked to prevent software-level attenuation. 2. Connectivity & Recognition Issues
If the device stops working mid-song or isn't recognized by your phone: AUDIOCULAR Conexant CX Pro CX31993 USB-C DAC & Amp
The CX31993 (also known as ) is a high-performance, low-power USB-C DAC/Amp chip widely used in budget audiophile "dongles." It is highly regarded for its 32-bit / 384kHz support and impressive signal-to-noise ratio (SNR) of Concept Kart Key Specifications
The following data represents the core technical capabilities of the CX31993 chipset found across various implementations: Specification Conexant CX31993 Resolution Up to 32-bit / 384kHz Dynamic Range Distortion (THD+N) Output Power ~65mW into 32Ω Output Voltage Practical "Fixes" & Improvements Android Volume Limit:
Users often find the volume low on Android because the system limits hardware volume. Using apps like USB Audio Player Pro (UAPP) Hiby Music
allows for direct hardware volume control, unlocking the full 2 Vrms output. FreeBSD Auto-Config: For those using it on FreeBSD, adding hw.snd.default_auto=2 /etc/sysctl.conf
ensures the system automatically switches to the DAC upon plugging it in. Static/Hiss Prevention:
If you hear static at low volumes, ensure the dongle is not near high-frequency interference (like a cellular modem). Some variants include a MAX97220 secondary amplifier Have you found other CX31993 datasheet gaps
to better drive demanding headphones and reduce the noise floor. Cable Durability:
A common failure point is the braided cable fraying near the USB-C connector. Using a small piece of heat-shrink tubing
at the joint can act as a "strain relief" fix to prolong its life. Comparisons vs. Apple Dongle:
The CX31993 generally offers higher output power (up to 2 Vrms vs. 1 Vrms) and better compatibility with non-Apple devices, especially regarding volume levels on Android. vs. ALC5686:
The CX31993 is often considered more "analytical" or "bright," whereas the Realtek ALC5686 is perceived as slightly warmer. CX31993 dongle (like the JCALLY or Audiocular) or more help with a technical issue Conexant CX31993 USB Type-C dongle review - Facebook
Application notes and examples can help users understand how to use the component in different applications. Consider including:
It is highly probable that CX31993 is a misinterpretation of CS51983 or a confusion with Cortex-M3 part numbers (which often follow similar naming conventions).
The CX31993 is capable of 117dB SNR and 0.002% THD+N—but the datasheet hides that behind sparse documentation. Apply these fixes and you’ll outperform many off-the-shelf dongles.
Pro tip: Always buy the CX31993 from official Synaptics distributors (Mouser, DigiKey). Counterfeit chips often have broken I²C and higher clock jitter. The Challenges with CX31993 Datasheet The CX31993 datasheet
Have you found other CX31993 datasheet gaps? Let me know—I’m maintaining a public errata.
Unlocking the Potential of CX31993: A Comprehensive Datasheet Fix and Improvement Guide
The CX31993 is a highly sought-after electronic component, widely used in various applications, including audio and video processing, telecommunications, and more. However, one of the biggest challenges faced by engineers and designers working with this component is the lack of accurate and comprehensive datasheets. In this article, we will explore the importance of datasheets, the common issues associated with the CX31993 datasheet, and provide a step-by-step guide on how to fix and improve it.
The Importance of Datasheets
Datasheets are a crucial resource for engineers and designers, providing detailed information about a component's specifications, features, and performance. A well-written datasheet can make all the difference in the design and development process, ensuring that the component is used correctly and efficiently. Datasheets typically include information such as:
The Challenges with CX31993 Datasheet
The CX31993 datasheet has been a subject of concern for many engineers and designers, with several issues reported, including:
Fixing and Improving the CX31993 Datasheet
To overcome the challenges associated with the CX31993 datasheet, we have compiled a comprehensive guide to help engineers and designers fix and improve the datasheet.
For years, the Cx31993 was "supported" by a generic driver that didn't handle its specific quirks well.