The CX31993 is designed by , a veteran in the audio field. However, locating an official, free datasheet for this chip is extraordinarily difficult, if not impossible, without a non-disclosure agreement (NDA). A search for the "CX31993 datasheet" often leads to product pages from retailers and DAC manufacturers, not to a technical document. This lack of accessible documentation creates several significant roadblocks for developers and DIY enthusiasts alike.
The CX31993 datasheet states that the chip dynamically senses output load to adjust its internal gain. cx31993 datasheet fix better
Many users report that their CX31993 dongles drop connection when bumped or when shifting sampling rates. The CX31993 is designed by , a veteran in the audio field
~117 dB to 124 dB (depending on implementation). Total Harmonic Distortion (THD+N): -95 dB. ~117 dB to 124 dB (depending on implementation)
| Parameter | Incorrect (bad copies) | | |-----------|----------------------|-------------------| | Supply voltage | 5V only | 3.3V – 5V (internal LDO) | | Output power | Unspecified or wrong | Up to 70mW into 32Ω | | SNR | 110dB (understated) | 124dB (A-weighted) | | THD+N | 0.004% | 0.0008% (-102dB) | | Supported sample rates | 32-192kHz | 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384kHz | | DSD support | "No" or unspecified | DSD64, DSD128, DSD256 (DoP) |
Use a passive inline volume attenuator or an adapter that adds a small amount of impedance (e.g., a 20-ohm resistor adapter). This forces the CX31993 to output a cleaner signal with a vastly reduced noise floor without sacrificing dynamic range. 3. Microphone Audio Not Working (TRRS Conflict)
What are you experiencing (noise, dropouts, low volume)? What headphones or speakers are you trying to drive?