DSD1791DB

ADCs/DACs - Special Purpose Overview

The DSD1791DB is a stereo digital-to-analog converter (DAC) from Texas Instruments, featuring 24-bit resolution and support for sampling rates up to 192 kHz. It utilizes an advanced segment architecture compatible with both DSD and PCM formats. The device operates on dual supplies: 5 V analog and 3.3 V digital, with 5-V tolerant digital inputs. Key performance metrics include a signal-to-noise ratio of 113 dB and total harmonic distortion plus noise of 0.001%. It provides two DAC outputs in a 28-pin SSOP package.

ADCs/DACs - Special Purpose Feature Summary

• Supports both DSD and PCM audio formats
• 24-bit resolution with 192 kHz sampling rate capability
• Analog performance: 113 dB dynamic range and 0.001% THD+N
• Dual supply operation: 5 V analog and 3.3 V digital

ADCs/DACs - Special Purpose Applications

• High-fidelity audio systems requiring hardware control
• Professional audio equipment utilizing DSD or PCM sources
• Stereo digital-to-analog conversion stages

ADCs/DACs - Special Purpose Procurement Notes

Verify the manufacturer designation carefully, as some distributor listings incorrectly attribute this component to Amphenol despite Texas Instruments being the primary source. Confirm the package type is SSOP-28 and ensure the specific suffix 'DB' corresponds to the tube packaging variant rather than tape-and-reel options like 'DBR'. Cross-reference the datasheet revision date (November 2006) for accurate electrical specifications.

ADCs/DACs - Special Purpose Selection Notes

Select the DSD1791DB when hardware-controlled audio conversion is required, distinguishing it from software-controlled variants like the PCM1791A which supports I2C/SPI interfaces. Ensure the design accommodates dual power rails (5 V analog, 3.3 V digital). Verify that the 113 dB SNR meets system requirements, noting that higher-performance alternatives such as the PCM1792 offer 132 dB SNR if superior dynamic range is necessary.

ADCs/DACs - Special Purpose Part Context

This component belongs to the DSD1791 series of high-performance audio DACs. It shares architectural similarities with the PCM1791ADBR but differs in interface control; the DSD1791 relies on hardware pins for configuration, whereas the PCM1791ADBR offers programmable control via I2C or SPI. Both devices share similar resolution and sampling capabilities within the same product family.

ADCs/DACs - Special Purpose Replacement Considerations

The PCM1791ADBR serves as a functional alternative if software control (I2C/SPI) is preferred over hardware pin control. For applications demanding higher dynamic range, the PCM1792 offers 132 dB SNR but requires different interface handling.