Integrating the CX31993 into a product is simplified by its architecture, but engineers must pay attention to a few critical design elements for optimal performance:
Elias picked it up with gloved hands. It was pristine. The silkscreening on the board was sharp, white text on a dark sea of fiberglass.
The datasheet highlights a sophisticated internal architecture designed to minimize interference and maximize audio fidelity. Digital-to-Analog Conversion cx31993 datasheet
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)
Elias looked around. The security camera in the corner was a dummy unit, its lens long since shattered. He tapped the 'Open' command. Integrating the CX31993 into a product is simplified
CX31993 Datasheet: A Deep Dive into the Conexant High-Performance USB-C DAC
| Parameter | Condition | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | | USB-C Spec | 4.4 | 5.0 | 5.5 | V | | Quiescent Current | No audio | - | 15 | 25 | mA | | Dynamic Current | 1Vrms output | - | 35 | 45 | mA | | Output Load Impedance | Stereo out | 16 | 32 | 600 | Ω | | Output Voltage (RMS) | 1% THD limit | - | 1.0 | 1.2 | Vrms | | Crosstalk | 1kHz signal | - | -85 | - | dB | | Frequency Response | 20Hz - 20kHz | +/-0.1 | Flat | +/-0.5 | dB | The security camera in the corner was a
Use a solid ground plane. Keep the analog ground (AGND) and digital ground (DGND) properly isolated to avoid digital "chirping" in the audio path.