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Cx31993 Datasheet _top_ -

While an official "public" datasheet for the Synaptics Conexant CX31993 is notoriously difficult to find due to its legacy status and Synaptics' acquisition of Conexant in 2017, the following technical specifications have been compiled from reliable product listings and community measurements. Core Technical Specifications

The CX31993 is a high-performance, low-power USB Type-C Audio SoC (System on a Chip) frequently used in portable DAC/Amp dongles. Any link to the cx31993 datasheet?

Conexant CX31993 (often branded as CX-Pro) is a highly efficient, high-performance USB-C Digital-to-Analog Converter (DAC) and integrated amplifier chip. It has gained widespread popularity in the "dongle DAC" market due to its ability to deliver high-resolution audio—up to 32-bit/384kHz —in a compact, low-power form factor. Technical Specifications and Performance

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)

The chip provides a "clean, uncolored output" that is often described as lean and neutral-to-slightly-bright. Its exceptionally high SNR of 128dB ensures a virtually silent background, making it ideal for sensitive In-Ear Monitors (IEMs) that might otherwise pick up audible hiss from standard smartphone or laptop soundcards. Design and Functional Integration

The CX31993 is more than just a decoder; it is a complete audio solution. Conexant (CX-Pro) CX31993 USB-C Amp/DAC Review

Understanding the CX31993: High-Fidelity Audio in a Tiny Package

If you’ve been looking for an affordable way to upgrade your mobile audio, you’ve likely stumbled upon the CX31993. This small but mighty System-on-Chip (SoC) has become a staple in the "dongle DAC" world, known for punching far above its weight class in terms of clarity and power.

Here is a breakdown of the technical specifications and performance highlights of the Technical Specifications at a Glance

Based on common implementation data found at retailers like Concept Kart and Amazon, here are the core specs: DAC Sampling Rate: Supports up to 32-bit / 384kHz.

Signal-to-Noise Ratio (SNR): >128dB, ensuring a clean background free of "hiss." Dynamic Range (DNR): >120dB. Total Harmonic Distortion (THD+N): -95dB. Output Power: Typically around 65mW @ 32Ω.

Interface: Native USB Type-C (compatible with Windows, Android, and iOS/iPadOS). Why It’s Popular Among Audiophiles The CX31993

is often favored over generic USB-C adapters for several reasons:

Bit-Perfect Audio: It supports high-resolution PCM files, allowing you to listen to "Master" quality tracks on streaming services like Tidal or Apple Music without downsampling. Low Power Consumption : Unlike some desktop-grade portable DACs, the CX31993

chip is designed for efficiency, meaning it won't drain your smartphone battery significantly during long listening sessions.

Clean Signal: With a high SNR of 128dB, it provides a "black" background, which is essential for sensitive In-Ear Monitors (IEMs) that often pick up electrical noise from poorly shielded devices. Common Implementation: The "CX-Pro" Dongle While the is a chip, you will most commonly find it inside the CX-Pro DAC Dongle . These devices often feature:

Braided Cabling: Usually 8-strand silver-plated copper for better durability and signal integrity.

Compatibility: Plug-and-play support for iPhone 15/16 series, Galaxy S-series, and Google Pixel.

Build: Compact aluminum alloy shells that act as a heat sink and shield against RF interference. Verdict

If you are transitioning away from a device with a 3.5mm jack or simply want to squeeze better sound out of your IEMs, a

-based adapter is perhaps the best "bang-for-your-buck" upgrade available today. It offers a transparent, neutral sound signature that doesn't color your music, letting your headphones do the talking.

CX31993 Datasheet: A Comprehensive Guide to the IC

The CX31993 is a highly integrated circuit (IC) designed for various applications in the field of electronics. As a crucial component in many electronic systems, understanding the CX31993 datasheet is essential for engineers, designers, and researchers working with this IC. In this article, we will provide an in-depth analysis of the CX31993 datasheet, covering its features, specifications, and applications. cx31993 datasheet

Overview of the CX31993 IC

The CX31993 is a mixed-signal IC that combines analog and digital circuits on a single chip. It is designed to provide a high level of integration, making it suitable for a wide range of applications, including audio processing, telecommunications, and industrial control systems. The IC is manufactured using a CMOS process, which enables low power consumption and high reliability.

Key Features of the CX31993 IC

The CX31993 IC offers several key features that make it an attractive choice for various applications:

  1. Multi-channel audio processing: The IC supports multiple audio channels, allowing for simultaneous processing of multiple audio signals.
  2. High-quality audio performance: The CX31993 provides high-quality audio performance, with low distortion and noise levels.
  3. Flexible interface: The IC features a flexible interface that allows for easy connection to various external devices.
  4. Low power consumption: The CX31993 is designed to consume low power, making it suitable for battery-powered devices.

CX31993 Datasheet Specifications

The CX31993 datasheet provides detailed specifications for the IC, including:

  1. Supply voltage: The IC operates from a supply voltage of 2.7V to 5.5V.
  2. Operating temperature: The CX31993 can operate over a temperature range of -40°C to +85°C.
  3. Audio performance: The IC provides a signal-to-noise ratio (SNR) of 90 dB and a total harmonic distortion (THD) of 0.01%.
  4. Interface: The IC features a digital interface that supports I2S and TDM audio formats.

CX31993 Pinout and Package

The CX31993 IC is available in a compact package, making it suitable for space-constrained applications. The IC has a total of 48 pins, which are assigned to various functions, including:

  1. Audio inputs and outputs: The IC has multiple audio input and output pins, allowing for connection to external audio devices.
  2. Digital interface: The IC features a digital interface that supports communication with external devices.
  3. Power and ground: The IC has dedicated pins for power and ground connections.

Applications of the CX31993 IC

The CX31993 IC is suitable for a wide range of applications, including:

  1. Audio processing systems: The IC can be used in audio processing systems, such as audio mixers, equalizers, and amplifiers.
  2. Telecommunications: The CX31993 can be used in telecommunications applications, such as voice over IP (VoIP) systems and audio conferencing equipment.
  3. Industrial control systems: The IC can be used in industrial control systems, such as monitoring and control systems for industrial equipment.

Design Considerations and Evaluation Boards

When designing with the CX31993 IC, several factors should be considered, including:

  1. Power supply design: The power supply design should ensure that the IC receives a stable and clean power supply.
  2. Audio signal routing: The audio signal routing should be carefully designed to minimize noise and distortion.
  3. Digital interface configuration: The digital interface configuration should be carefully set up to ensure proper communication with external devices.

To facilitate the evaluation and development of systems using the CX31993 IC, several evaluation boards are available. These boards provide a platform for testing and evaluating the IC, allowing designers to quickly assess its performance and capabilities.

Conclusion

In conclusion, the CX31993 datasheet provides a comprehensive overview of the IC's features, specifications, and applications. The IC offers high-quality audio performance, low power consumption, and a flexible interface, making it suitable for a wide range of applications. By understanding the CX31993 datasheet and considering design factors, engineers and designers can effectively integrate the IC into their systems and take advantage of its capabilities.

References

  • CX31993 datasheet ( official datasheet from the manufacturer)
  • CX31993 user manual (official user manual from the manufacturer)
  • Audio processing applications using the CX31993 IC (application note)

Additional Resources

For more information on the CX31993 IC, including evaluation boards, software tools, and technical support, please visit the manufacturer's website. Additionally, online forums and communities can provide valuable resources and insights from experienced engineers and designers who have worked with the CX31993 IC.

is a high-performance, low-power USB Type-C digital-to-analog converter (DAC) chip frequently used in high-fidelity (Hi-Fi) audio dongles and expansion cards. It is designed to provide high-resolution audio decoding for mobile devices and computers that lack a dedicated 3.5mm headphone jack. Framework Community Core Specifications Any link to the cx31993 datasheet?

The "story" of the CX31993 datasheet is essentially a saga of an elusive document that became a grail for the budget audiophile and DIY tech communities.

While most modern tech components have easily accessible manuals, the CX31993—a high-performance

Digital-to-Analog Converter (DAC) chip—gained "dark horse" status because it was powerful, cheap, and surprisingly difficult to find technical documentation for. 1. The "Hidden Gem" Discovery The CX31993 chip first rose to fame through the While an official "public" datasheet for the Synaptics

(Chinese Hi-Fi) community. Reviewers began noticing that dirt-cheap USB-C dongles (often called "CX-Pro") were outperforming big-name brands and even the gold-standard Apple dongle in certain areas like power and clarity on Android devices. It offered a massive 130dB signal-to-noise ratio and support for 32-bit/384kHz audio, which was unheard of for its sub-$15 price point. audioreviews.org 2. The Datasheet Hunt

As enthusiasts tried to integrate the chip into custom projects—like the Framework Laptop's audio expansion card —they hit a wall: there was no official public datasheet. Framework Community The Mystery: Users on forums like

and Facebook groups spent years hunting for the spec sheet to verify its claims or filter out specific electrical noise. The "Leak":

Eventually, unofficial copies and snippets began circulating in private Google Drive folders and niche engineering forums, allowing hobbyists to confirm its ultra-low power consumption and multi-mode power control. Framework Community 3. Key Specs Revealed

Through the community’s collective effort, the "legendary" specs of the CX31993 were finally mapped out: Audio Expansion Card - CX31993 Datasheet

CX31993 Datasheet: A Deep Dive into the High-Performance USB-C DAC Chip

The CX31993 has rapidly become a favorite among audiophiles and DIY electronics enthusiasts. Known for its impressive signal-to-noise ratio and low power consumption, this System-on-Chip (SoC) is the heart of many popular USB-C to 3.5mm "dongle" DACs.

If you are designing a mobile audio accessory or simply trying to understand the specs of your favorite portable DAC, this guide breaks down the essential technical details found in the CX31993 datasheet. 1. Overview of the CX31993

The CX31993 is a highly integrated, low-power USB Type-C digital-to-analog converter (DAC) designed for high-resolution audio applications. It bridges the gap between digital USB-C outputs and analog headphones, providing a significant upgrade over the standard audio processing found in most smartphones and laptops. Key Specifications at a Glance: Sampling Rate: Up to 384kHz Bit Depth: 32-bit

SNR (Signal-to-Noise Ratio): ~117dB to 128dB (depending on implementation) THD+N: -95dB Output Power: ~31mW @ 32Ω Interface: USB 2.0 Full Speed / High Speed 2. Technical Architecture

The datasheet highlights a sophisticated internal architecture designed to minimize interference and maximize audio fidelity. Digital-to-Analog Conversion

The chip utilizes a multi-bit Delta-Sigma modulator. This allows it to handle high-resolution files (PCM) with minimal quantization noise. The 32-bit depth ensures that even the quietest passages in a recording are reproduced with precision. Adaptive Power Management

One of the CX31993’s standout features is its power efficiency. It is designed to draw minimal current from the host device (phone or tablet), which is critical for preserving battery life during long listening sessions. 3. Audio Performance Metrics

When reviewing the datasheet, three metrics define the CX31993's performance:

Dynamic Range: With a rating often exceeding 120dB, the chip can handle the vast difference between the loudest peaks and the softest whispers in high-fidelity tracks.

Crosstalk: The chip features excellent channel separation (typ. -110dB), ensuring a wide and accurate soundstage where instruments are clearly placed.

Frequency Response: It maintains a flat response from 20Hz to 80kHz, making it suitable for "Hi-Res Audio" certification. 4. Pin Configuration and Integration

For engineers, the CX31993 datasheet specifies a compact form factor (usually a QFN package). Key pins include: VBUS/GND: Power delivery from the USB source. D+/D-: Differential data lines for USB communication.

HPR/HPL: Analog outputs for the Right and Left headphone channels.

MIC/HP_DET: Supports microphone input and headphone detection, enabling "plug-and-play" functionality with inline remotes. 5. Typical Applications

Because of its high integration, the CX31993 requires very few external components, making it ideal for:

USB-C Audio Dongles: The most common use case for upgrading mobile audio. Multi-channel audio processing : The IC supports multiple

Gaming Headsets: Providing a clean, amplified signal for competitive gaming.

USB Microphones: Managing the analog-to-digital conversion for recording.

DIY Audio Projects: Integrating high-quality audio into Raspberry Pi or Arduino-based media centers. 6. CX31993 vs. Competitors (ALC5686 / ES9280)

In the world of budget DAC chips, the CX31993 is often compared to the Realtek ALC5686. While both offer 32-bit/384kHz support, the CX31993 is often praised for having a "cleaner" and "more analytical" sound signature, whereas the ALC5686 is sometimes described as slightly warmer. Conclusion

The CX31993 is a powerhouse in the miniature DAC market. Its datasheet reveals a chip that prioritizes high-resolution transparency and power efficiency, making it an excellent choice for anyone looking to bypass the mediocre internal audio circuitry of modern mobile devices.

The glowing blue light of the CX31993 was the last thing Elara saw before the noise floor finally swallowed her world.

She was a "Sonic Archaeologist," a title she’d made up to justify spending her life digging through the digital remains of the 21st century. Her latest find was a small, silver-braided cable—a relic of an era when humans still used physical wires to pump sound directly into their skulls. At its heart sat the Conexant CX31993, a tiny piece of silicon that promised high-resolution salvation in a world of compressed static.

"Thirty-two bits," she whispered, her voice cracking in the dry air of the archive. "Three hundred and eighty-four kilohertz." The numbers felt like a prayer.

In her time, audio was a luxury. The Great Muffling had left the atmosphere thick with electromagnetic interference, turning every song into a muddy mess. But according to the CX31993 datasheet, this little chip had a signal-to-noise ratio (SNR) of 128dB. It was a surgical tool designed to cut through the hum of the universe.

She plugged the ancient USB-C connector into her rig. Her console flickered, recognizing the device with a archaic ping. "UAC1.0 detected," the screen flashed.

"Come on, you little dark horse," she urged, recalling the old forum posts that called it a budget giant.

As the first track began to play, the "lean, neutral-to-slightly-bright" tonality the datasheet promised flooded her senses. The low-impedance IEMs in her ears didn't just play music; they reconstructed a lost reality. She could hear the distinct "air" between instruments, a transparency that the bulky, more expensive amplifiers of her era could never mimic.

But there was a catch—the datasheet warned of its limits. At 1V RMS, it was an efficient beast, but it lacked the "thrust" to drive the heavy, 150-ohm "cans" of the old-world titans. When she tried to push a bass-heavy anthem, the low end felt "flabby," exactly as the ancient reviewers had prophesied.

Suddenly, a spike of 200kHz noise—the "Class D ghost" mentioned in a late-century engineering forum—screeched through the line. Elara scrambled to adjust her filters, realizing the chip was more than just a DAC; it was a window.

The datasheet wasn't just a list of specs; it was a map to a frequency range humans had forgotten how to hear. In that moment, surrounded by the silence of a dead century, Elara realized that as long as the CX31993 held its steady 0.0015% THD+N, the past would never truly be silent. Audio Expansion Card - CX31993 Datasheet

Note: The full public datasheet for CX31993 is proprietary and not freely available. This guide is based on publicly disclosed specifications, application notes, and reverse-engineering from known products (e.g., Conexant/CX-Audio dongles). For register-level details, you must sign an NDA with the manufacturer.

The Missing Datasheet Details

Official datasheets typically include pinout diagrams, register maps, and thermal characteristics. For the CX31993, the core logic is contained in a QFN-16 or WLCSP package. Pin 1 is usually the VBUS detection (5V input), while Pins 7 & 8 handle the USB D+/D- differential pair.

Part 6: Competitor Comparison – CX31993 vs. Realtek ALC5686 vs. ALC4042

To fully appreciate the CX31993 datasheet, one must compare it to the market alternatives.

| Feature | CX31993 | Realtek ALC5686 | Realtek ALC4042 | | :--- | :--- | :--- | :--- | | Max Sample Rate | 384 kHz | 384 kHz | 96 kHz | | SNR | 124 dB | 120 dB | 104 dB | | THD+N | -93 dB | -95 dB | -85 dB | | Output Power (32Ω) | 30 mW | 33 mW | 40 mW | | DSD Support | DSD128 | DSD128 | No | | Typical Use | Mid-range dongles | High-end dongles | Budget dongles |

Conclusion: The CX31993 is superior to old Realtek ALC4042 chips (found in Google’s first dongle) but is technically beaten on sheer power by the ALC5686. However, the CX31993 has better noise immunity (124dB SNR), making it the king of black background silence.

What is the CX31993?

The CX31993 is a high-performance, low-power audio codec chip. It is designed to act as the bridge between the digital brain of your device (the SoC/CPU) and the analog world of sound (microphones, speakers, and headphones).

Developed with a focus on high-fidelity playback, this chip is often found in premium smartphones and development boards where audio quality is a priority over cutting corners on the Bill of Materials (BOM).