Cx31993 Datasheet Fix Hot [updated]

The device now runs within the manufacturer’s intended thermal envelope. More importantly, audio quality improves: no more "glare" or "digital harshness" caused by the oscillation and thermal noise.

The Conexant CX31993 has become a darling in the portable audio world. Found in countless ultra-compact USB-C to 3.5mm dongle DACs (often labeled as "Hi-Res Audio" or "32bit/384kHz"), this chip offers impressive specs for its size and price. It supports PCM up to 384kHz and has a built-in headphone amplifier capable of driving many IEMs and headphones. cx31993 datasheet fix hot

Before fixing anything, we must understand the chip's intended electrical behavior. The official CX31993 datasheet (Rev 2.1, typically) specifies several critical parameters: The device now runs within the manufacturer’s intended

: Temporarily disabling "Bit-perfect" mode may help if the source device is struggling to manage high-resolution streams, though this may slightly impact sound quality. Found in countless ultra-compact USB-C to 3

Heat issues are common when the chip is paired with a secondary amplifier, such as the MAX97220 .

Clarify the $R_\theta JC$ value to encourage the use of thermal vias. The datasheet should explicitly state that the device requires a thermal pad connected to the ground plane via an array of thermal vias.