Cx31993 Datasheet

This compatibility has been verified across a wide range of devices:

| Advantage | Description | | :--- | :--- | | | Flagship-level specifications (128dB SNR, 384kHz) at budget-friendly prices | | Driverless Operation | True plug-and-play across all major operating systems | | Extremely Low Power Consumption | Minimal impact on host device battery life | | Wide Headphone Compatibility | Drives everything from sensitive IEMs to 600Ω high-impedance headphones | | Built-in Microphone Support | Enables calls and voice applications | | No External Crystal Required | Simplifies design, reduces BOM cost, and improves reliability | | Excellent Measured Performance | Flat frequency response, low distortion, low crosstalk | | Widely Implemented and Tested | Proven in dozens of commercial products |

In most commercial implementations, the CX31993 is —a dedicated headphone amplifier chip from Maxim Integrated. This two-chip configuration is widely adopted because the MAX97220 provides higher output power, lower output impedance, and robust protection features that complement the CX31993's DAC functionality.

The CX31993 is a high-performance USB audio bridge with an integrated DAC and headphone amplifier. It is designed specifically for USB-C to 3.5mm adapters, mobile phones, and tablets. Its primary draw is the ability to deliver high-resolution audio (Hi-Res) with extremely low power consumption and a small physical footprint. Key Features: Up to 32-bit / 384kHz PCM. Interface: USB 2.0 High-Speed (Type-C compatible). SNR (Signal-to-Noise Ratio): ~128dB (A-weighted). Dynamic Range: ~120dB. THD+N: -95dB @ 32 ohms. Power Consumption: < 50mW (active). 2. Technical Specifications (Datasheet Summary) Audio Performance cx31993 datasheet

: Typically 65mW into a 32Ω load, providing roughly 1V RMS output. Architecture and Application

For consumers, devices powered by the CX31993 provide an affordable pathway to audibly transparent audio reproduction. Whether used as a simple USB-C to 3.5mm adapter or integrated into a more sophisticated portable DAC/amp, the CX31993 consistently delivers clean, accurate, and detailed sound that fully reveals the nuances of high-resolution recordings.

When designing a PCB for the CX31993, engineers must adhere to strict layout practices to prevent digital switching noise from bleeding into the high-resolution analog output. This compatibility has been verified across a wide

| Measurement | Result | | :--- | :--- | | Frequency Response Variation (40Hz-15kHz) | -0.1 dB to +0.0 dB | | Output Impedance (Average, 40Hz-15kHz) | 0.2Ω | | Voltage Output (Maximum, before clipping) | 1.0 VRMS | | Current Output (Maximum) | 51.3 mA | | Crosstalk @ 1kHz (100Ω load) | -60.5 dB |

Audio performance is highly dependent on power supply quality. Recommendations include:

The CX31993 datasheet is a comprehensive document that provides detailed information about the IC's features, specifications, and applications. The datasheet is a crucial resource for engineers, designers, and developers who want to integrate the CX31993 into their projects. Here's an overview of what you can expect to find in the CX31993 datasheet: It is designed specifically for USB-C to 3

One of the chip's most remarkable features is its , which eliminates the need for an external crystal. This simplifies PCB design, reduces bill-of-materials (BOM) costs, and minimizes the risk of clock-related interference. The chip is plug-and-play , requiring no additional drivers and offering seamless compatibility across Windows, macOS, Android, and iOS.

The CX31993 is recognized for delivering audiophile-grade performance within a standard bus-powered USB envelope. DAC Performance (Playback) 16-bit, 24-bit, 32-bit PCM Sampling Rates: 44.1 kHz, 48 kHz, 96 kHz, 192 kHz, 384 kHz Signal-to-Noise Ratio (SNR): Up to 124 dB (A-weighted) Dynamic Range (DNR): 120 dB

Route the USB D+ and D- traces as a differential pair with a target differential impedance of 90

: Hardware level compliance allows immediate plug-and-play functionality across Android, Windows 10/11, macOS, and iOS (including iPhone 15/16 series) without proprietary driver packages.

The CX31993's eliminates the need for an external crystal or clock source, significantly simplifying PCB layout and reducing BOM cost. The chip requires only a minimal number of passive components (capacitors, resistors) around it to function, enabling compact, single-sided PCB designs.