The is a cornerstone of the modern portable audio market. It offers a compelling package of high-resolution audio support, an extremely clean signal path, and wide device compatibility, all while requiring minimal power. While the official datasheet remains difficult to access publicly, the wealth of technical information available from component distributors, application notes, and community testing provides a complete picture of its capabilities.
A minimal working circuit includes:
The CX31993 is built on a single-chip architecture and boasts an extremely simple peripheral circuit design. It can implement high-quality audio output with just a minimal number of passive components. In many commercial products, the CX31993 is paired with an external operational amplifier (op-amp), such as the MAX97220. This "dual-chip" configuration combines the DAC capabilities of the CX31993 with the high-power drive capability of the MAX97220, achieving a significant leap in sound quality and power output. cx31993 datasheet