The chip is an "all-in-one" solution commonly found in budget audiophile "dongles" (USB-C to 3.5mm adapters) such as the or Abigail .
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
A: The difference is substantial. While a typical smartphone's internal DAC may achieve only 60-70dB SNR with noticeable distortion, the CX31993 offers >128dB SNR and <0.0003% THD+N. This translates to a much cleaner, more detailed sound with a lower noise floor and significantly better resolution.
The analog outputs are typically capless, utilizing an internal ground-centered architecture. This removes the need for large, bulky DC-blocking coupling capacitors.
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:
Today’s target was a salvage haul from a sunken drone carrier. Mostly rusted hull plating and fried servo motors. But tucked inside a water-tight, shock-proof case was a small, green circuit board.
At the launch, the glider slipped into a harbor at dawn. The team held their breath as it submerged, a dark pebble sinking then steadying. Hours later it surfaced at the right interval, flashed its burst of telemetry, and dove again, accurate to the second. The data streams arrived like postcards: buoyancy cycles matched predicted curves; comms windows were hit precisely; power consumption held below the budgeted line. They had turned a forgotten datasheet into a choreography.
The CX31993 typically comes in a small package, making it ideal for the slim profiles of USB-C dongles.
At price points typically below $50, the CX31993 offers exceptional value. When paired with a MAX97220 amplifier, it achieves performance levels that rival or exceed those of some desktop DACs from just a few years ago. The primary limitation compared to higher-end competitors (such as the CS43131) is the lack of native DSD decoding and more advanced filter options.
CX31993 Datasheet: A Deep Dive into the Conexant High-Performance USB-C DAC
>128dB. This extremely high SNR indicates a very low noise floor, allowing for silent backgrounds in music. Dynamic Range (DNR): >120dB.
CX31993 Datasheet: Comprehensive Review, Pinout, and Audio Performance Analysis