The CX31993 acts as a bridge between high-speed digital USB protocols and high-fidelity analog audio signals. The system-on-chip (SoC) integrates a , a high-resolution execution engine, native stereo digital-to-analog converters, and an integrated analog microphone analog-to-digital converter (ADC).
CX31993 Datasheet: A Deep Dive into the High-Performance USB-C DAC Chip
An impressive 0.0003% , meaning almost zero audible distortion.
Unleashing Hi-Res Audio: A Deep Dive into the CX31993 DAC If you’ve been browsing for a budget-friendly way to upgrade your mobile audio, you’ve likely crossed paths with the . Often found in ultra-portable USB-C dongles, this tiny silicon powerhouse has become a cult favorite for audiophiles who want high-end specs without the "high-end" price tag. cx31993 datasheet
The CX31993 is engineered to meet modern high-resolution audio standards while maintaining a minimal thermal and power footprint. Digital-to-Analog Converter (DAC) Specifications Up to 32-bit PCM
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Integrated Acoustic Echo Cancellation (AEC) support and digital noise suppression filters via firmware configuration. Headphone Amplifier Output Output Power: Up to 65mW per channel into 32 Ωcap omega The CX31993 acts as a bridge between high-speed
| Parameter | Value / Specification | | :--- | :--- | | | USB Audio Codec (DAC + Headphone Amp) | | DAC Resolution | 32-bit | | Max PCM Sampling Rate | 384 kHz | | Signal-to-Noise Ratio (SNR) | > 128 dB | | Dynamic Range (DNR) | > 120 dB | | Total Harmonic Distortion + Noise (THD+N) | < 0.0003% | | Output Power | 65 mW @ 16Ω / 30 mW @ 32Ω | | Supported Headphone Impedance | 16Ω to 600Ω | | Output Voltage | 1Vrms (typical) | | Power Consumption | < 0.125W (approx.) | | Standby Power Consumption | ≤ 0.01W | | Interfaces | USB 2.0 (UAC 1.0/2.0), I2S, S/PDIF, I2C | | Audio Formats | PCM, DSD (DoP) | | EQ | 5-band Parametric EQ | | OS Compatibility | Windows, macOS, Linux, Android, iOS (Plug-and-Play) | | Package | QFN (Quad Flat No-leads) |
This allows developers to offload audio processing tasks—such as equalization, noise suppression for microphones, and 3D sound effects—from the main CPU to the codec itself. This not only frees up the CPU for other tasks but ensures consistent audio processing latency.
The CX31993 datasheet lived on a cool, cluttered server in a forgotten lab—a tidy PDF among schematic diagrams and firmware notes. For most engineers it was a tool: pinouts, timing diagrams, electrical characteristics neatly boxed in monochrome tables. For Mara, it was a map. Unleashing Hi-Res Audio: A Deep Dive into the
Technically, the chip is designed for transparency. Its low output impedance (< 1 ohm) ensures that it doesn't color the sound of multi-driver IEMs (In-Ear Monitors), maintaining a flat frequency response across the spectrum. 5. Design Considerations for Engineers
Because of its high integration, the CX31993 requires very few external components, making it ideal for:
Based on available technical specifications for the CX31993 USB-C DAC chip
, it efficiently drives most in-ear monitors (IEMs) and efficient on-ear headphones. It may struggle to drive high-impedance (e.g., >300 Ωcap omega
With 32bit/384kHz support, it offers legitimate audiophile-grade decoding.