PCM2704DBRG4

ADCs/DACs - Special Purpose Overview

The PCM2704DBRG4 is a stereo audio digital-to-analog converter (DAC) manufactured by Texas Instruments. It integrates a USB 2.0 Full-Speed interface to receive digital audio data directly from a host computer, eliminating the need for separate USB controllers or drivers in many implementations. The device supports 16-bit resolution and sampling rates up to 48 kHz. Key electrical specifications include a signal-to-noise ratio (SNR) of 98 dB. It features single-ended headphone outputs and an S/PDIF output for digital audio transmission. The component operates on a single supply voltage of 3.3 V or 5 V and is housed in a 28-pin SSOP package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated USB 2.0 Full-Speed interface for direct connection to PC hosts
• Stereo DAC with 98 dB SNR and 16-bit resolution at 48 kHz
• Provides both analog line-out/headphone outputs and digital S/PDIF output
• Bus-powered operation capability with external ROM interface support

ADCs/DACs - Special Purpose Applications

• USB-connected multimedia speakers
• Portable audio players and MP3 devices
• Computer peripheral audio interfaces
• Consumer electronics requiring integrated USB audio functionality

ADCs/DACs - Special Purpose Procurement Notes

Verify the suffix 'G4' indicates lead-free and RoHS compliance as per Texas Instruments standards. Confirm the package type is SSOP-28 and the operating temperature range matches the application requirements (-25°C to +85°C). Ensure the design supports the required power supply voltages of 3.3 V or 5 V. Check for any specific revision differences in the datasheet that might affect pin compatibility or electrical characteristics compared to earlier versions.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a compact solution for stereo audio conversion via USB is required without external controller chips. It is suitable for applications needing high audio fidelity (98 dB SNR) in a small form factor. Consider the SSOP-28 package constraints for PCB layout. If higher sampling rates or codec functionality (ADC) are needed, other models in the PCM27xx or PCM29xx series should be evaluated instead.

ADCs/DACs - Special Purpose Part Context

The PCM2704DBRG4 belongs to the PCM270xC family of stereo audio DACs from Texas Instruments. This family is designed specifically for USB audio applications, simplifying system architecture by combining the DAC and USB interface in one IC. The 'DBRG4' designation specifies the tape-and-reel packaging, lead-free finish, and environmental compliance, distinguishing it from tube-packaged or non-compliant variants within the same functional family.

ADCs/DACs - Special Purpose Replacement Considerations

Direct replacements must maintain the USB 2.0 FS interface, stereo DAC functionality, and SSOP-28 package. Verify pinout compatibility with existing designs. Other members of the PCM270xC family may offer similar performance but different packaging or minor feature variations. Cross-reference with TI's official replacement guide for confirmed substitutes.