The glowing blue light of the was the last thing Elara saw before the noise floor finally swallowed her world.
>128dB. This extremely high SNR indicates a very low noise floor, allowing for silent backgrounds in music. Dynamic Range (DNR): >120dB.
While many DACs require external clocks or complicated power filtering, the CX31993 is "plug-and-play" with standard UAC 2.0 drivers. It works natively on Android, iOS (with an adapter), Windows 10/11, and macOS. Sound Profile
The datasheet for the CX31993 reveals a chip designed for audiophile-grade transparency at a budget price point. Key performance metrics include: Specification Sampling Rate 32-bit / 384kHz (PCM) Signal-to-Noise Ratio (SNR) Dynamic Range (DNR) 0.0003% (-95dB) Output Power (Thrust) 65mW per channel @ 32Ω DSD Support DSD 64/128 (via PCM conversion) cx31993 datasheet
: Supports up to 32-bit / 384kHz PCM audio decoding.
| Address | Function | Example value | |---------|----------|----------------| | 0x00 | Chip reset | 0x01 (soft reset) | | 0x01 | Volume control L | 0x00 – 0x3F | | 0x02 | Volume control R | 0x00 – 0x3F | | 0x03 | Mute / unmute | bit0=1 mute | | 0x04 | Sample rate selection | 0x00=48k, 0x02=96k | | 0x05 | Headphone detection status | read-only bit | | 0x06 | Mixer / sidetone control | for mic monitoring |
: Native hardware compliance with USB Audio Class 2.0 (UAC2) guarantees asynchronous data transfer. This design bypasses host-device clock jitter by utilizing an internal phase-locked loop (PLL). The glowing blue light of the was the
Without the full datasheet, you cannot change advanced settings (e.g., digital filter roll-off, de-emphasis).
The CX31993's straightforward architecture allows for a simple and minimal external component count, enabling compact, high-performance designs. In its most common configuration—a USB-C to 3.5mm audio adapter—the chip operates as a standalone solution, requiring only a few passive components and an audio jack connector to function. Many products take this further by pairing the CX31993 with a dedicated headphone amplifier chip, most notably the , to boost output power for more demanding headphones. This DAC+AMP combo is widely regarded as a cost-effective and powerful "reference design" for many budget-friendly "dongles" and "small tail" DACs.
For optimal audio quality and EMI immunity: Dynamic Range (DNR): >120dB
The CX31993, a high-performance USB-C audio decoding chip from Conexant (now part of Synaptics), has become a cornerstone in portable Hi-Fi audio. It is widely used in products like USB-C to 3.5mm audio adapters ("dongles"), portable DAC/amps, and gaming audio solutions. While an official, public datasheet from Conexant is not readily available and is often restricted to NDA, a comprehensive set of technical specifications can be compiled from trusted technical reviews, analysis reports, and product documentation. This article aggregates all critical specifications of the CX31993 to serve as a practical datasheet for engineers, product managers, and audio enthusiasts.
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The is a compact, integrated Hi-Res Lossless Music DAC and headphone amplifier designed specifically for USB-C audio applications. It is manufactured by Conexant, aiming to provide high-quality audio conversion, allowing users to experience superior sound quality over standard USB-C to 3.5mm passive adapters.