PCM1795DB

ADCs/DACs - Special Purpose Overview

The PCM1795DB is a stereo audio digital-to-analog converter (DAC) manufactured by Texas Instruments. It features a 32-bit resolution and supports sampling rates up to 200 kHz. The device utilizes Delta-Sigma architecture and includes two converters with dual bipolar outputs. It operates on a single power supply ranging from 4.75 V to 5.25 V, consuming 21 mA of current. Key performance metrics include a signal-to-noise ratio (SNR) of 123 dB and a total harmonic distortion plus noise (THD+N) of 0.0005%. The component is housed in an SSOP-28 package and supports I2C and SPI serial interfaces.

ADCs/DACs - Special Purpose Feature Summary

• 32-bit resolution with 200 kHz maximum sampling rate
• High fidelity performance: 123 dB SNR and 0.0005% THD+N
• Dual bipolar analog outputs for stereo applications
• Supports I2C and SPI digital control interfaces

ADCs/DACs - Special Purpose Applications

• Advanced segment audio systems
• Stereo DAC implementations
• Professional audio equipment requiring high dynamic range

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix to confirm packaging type. The PCM1795DB designation typically corresponds to tube packaging, whereas variants like PCM1795DBR indicate reel or cut tape options. Confirm RoHS compliance status and ensure the SSOP-28 footprint matches the target PCB design before procurement.

ADCs/DACs - Special Purpose Selection Notes

Select this component when 32-bit resolution and ultra-low distortion are required for stereo audio paths. Ensure the system design accommodates the 4.75 V to 5.25 V single-supply requirement. Verify that the host controller supports either I2C or SPI protocols for configuration. Compare against the PCM1792A if 24-bit resolution is sufficient, noting differences in SNR and gain error specifications.

ADCs/DACs - Special Purpose Part Context

The PCM1795DB belongs to the PCM1795 series of audio DACs from Texas Instruments. This series is designed for high-performance audio applications, offering superior linearity and low noise compared to standard 24-bit counterparts. It serves as a specialized solution for advanced segment audio markets where precise digital-to-analog conversion is critical.

ADCs/DACs - Special Purpose Replacement Considerations

The PCM1795DBR is a functional equivalent within the same series, differing primarily in packaging format (reel/cut tape vs. tube). For lower resolution needs, the PCM1792ADBR offers similar interface support but with 24-bit resolution and different electrical characteristics.