What this part is and where it fits
The Texas Instruments PCM2900BDB-BB is a Stereo Audio codec that handles both ADC and DAC paths through a single USB data interface — no I2S, no SPI, just plug the USB into a host and the audio lines into a line-level source or headphones. The 16-bit resolution and Sigma Delta architecture put it in the consumer-audio tier, good for USB speakers, headsets, sound cards, and conference-room peripherals. The 28-SSOP package is a surface-mount footprint that sits on a standard PCB without needing a BGA reflow profile.
SNR and dynamic range — the audio quality numbers that matter
The ADC path delivers 89 dB SNR and 89 dB dynamic range; the DAC path delivers 96 dB SNR and 93 dB dynamic range.
Supply and temperature range
Both analog and digital supplies run from 3.1 V to 3.5 V. The operating temperature range is -25°C to 85°C.
Lifecycle and sourcing reality
The PCM2900BDB-BB is listed as Active and ROHS3 compliant. No end-of-life notice, no last-time-buy clock ticking.