PCM5122PW

ADCs/DACs - Special Purpose Overview

The PCM5122PW is a stereo audio digital-to-analog converter (DAC) from Texas Instruments, housed in a 28-pin TSSOP package. It features a DirectPath output architecture that eliminates the need for external DC-blocking capacitors by generating a ground-centered 2V RMS signal. The device supports 32-bit resolution and sampling rates up to 384 kHz. Key electrical specifications include an SNR of 112 dB and a dynamic range of 112 dB. It operates on a single 3.3 V supply with power consumption ranging from 300 µA to 15 mA across the -25°C to +85°C temperature range.

ADCs/DACs - Special Purpose Feature Summary

• DirectPath Output: Eliminates external coupling capacitors via internal charge pump for ground-centered 2V RMS output.
• High Fidelity: Delivers 112 dB SNR and dynamic range with 32-bit resolution at 384 kHz.
• Integrated Processing: Includes fixed-function miniDSP for digital filtering, DRC, bass management, and EQ.
• Flexible Clocking: Features a programmable PLL to generate DAC clocks from standard master clocks.

ADCs/DACs - Special Purpose Applications

• Portable Bluetooth speakers and soundbars requiring compact BOMs.
• Car infotainment systems needing high-quality audio processing.
• Professional audio equipment utilizing I2C/SPI configuration.

ADCs/DACs - Special Purpose Procurement Notes

Verify the suffix 'PW' indicates the TSSOP-28 package variant rather than the reel-packaged 'PWR'. Confirm RoHS compliance status through official documentation. Ensure the supplier provides the original manufacturer datasheet SLAS789 for technical validation before integration.

ADCs/DACs - Special Purpose Selection Notes

Select this component when capacitor-free output is required to save PCB space. Compare against PCM5121 if lower SNR (106 dB) is acceptable for cost reduction. Verify interface compatibility with I2S/TDM data sources and ensure the host system supports I2C/SPI control registers.

ADCs/DACs - Special Purpose Part Context

This part belongs to the PCM512x series of audio DACs. It shares architectural similarities with the PCM5121 but offers higher performance metrics. The PW suffix specifically denotes the tube-packaged TSSOP-28 form factor, distinct from the tape-and-reel PWR variant.

ADCs/DACs - Special Purpose Replacement Considerations

PCM5121PWR serves as a functional substitute with slightly reduced SNR (106 dB). PCM5122PWR is identical electrically but differs in packaging format (reel vs. tube).