Audio ADCs (Analog-to-Digital Converters) are not a specific brand but a category of electronic components used to convert analog audio signals into digital data. They are produced by various global companies, such as Texas Instruments (USA), Analog Devices (USA), Cirrus Logic (USA), and ESS Technology (USA/China). These components are widely used in industries like consumer electronics (e.g., smartphones, headphones), professional audio equipment, automotive infotainment systems, and industrial automation. Key products include high-resolution ADCs, low-power audio converters, and integrated audio codecs, enabling high-fidelity sound reproduction and signal processing.