The PCM2705 from Texas Instruments is a high-quality, single-chip USB stereo audio digital-to-analog converter (DAC) that offers an excellent audio solution for a wide range of applications. This integrated circuit is designed to bridge the gap between digital audio content on computers or other USB audio sources and traditional audio equipment such as headphones, speakers, or audio receivers.

Key Features

• USB Interface: Fully compliant with USB 1.1 specification, it allows for easy plug-and-play operation with no need for additional drivers or software installation on most modern operating systems.
• On-Chip USB Protocol: The PCM2705 handles all the USB protocol in-house, which means minimal processor overhead and simplified design for the end product.
• High-Quality Audio: With a built-in 16-bit Delta-Sigma DAC, it delivers excellent sound quality with a dynamic range of 98dB and THD+N of 0.006%.
• Integrated Headphone Amplifier: The on-chip headphone amplifier provides direct drive to headphones, offering a complete audio solution in a single package.
• Customizable Output: The device includes a SpAct™ architecture, which allows end-users to customize the audio output by using external EEPROM.
• Multiple Output Formats: The PCM2705 supports I²S and S/PDIF output formats, giving designers flexibility in system design.
• Bus-Powered: The device can be powered directly from the USB bus, eliminating the need for external power supplies and simplifying overall system power management.
• Compact Package: Available in a 28-pin SSOP package, the PCM2705 is suitable for space-constrained applications.

Applications

The PCM2705 is ideal for a variety of audio applications, including USB headphones, USB speakers, USB audio interface boxes, and audio docking stations for portable media players. Its ease of integration and high-quality audio output make it a popular choice for manufacturers and hobbyists alike looking to enhance their audio systems with USB connectivity.