What this part is and where it fits
The Texas Instruments PCM5122PWR is a stereo audio DAC from the DirectPath™ series, delivering 16-, 24-, or 32-bit resolution at sampling rates up to 384k samples per second. It accepts a PCM digital audio input and outputs two channels of analog audio. The part is designed for consumer and professional audio equipment — think AV receivers, soundbars, mixing consoles, and active speakers — where clean conversion and low noise are required. The 28-TSSOP package keeps the footprint compact for mixed-signal PCBs.
Supply and signal chain
The PCM5122PWR runs from a single supply rail between 1.65 V and 3.46 V. The voltage supply source is both analog and digital, so the internal charge pump and output stage are self-contained.
Resolution and sampling — what the numbers mean for your design
The 32-bit resolution and 384k sampling rate support high-resolution audio. 32-bit word length gives headroom for digital volume control and DSP processing without truncation noise.