Stereo DAC with I²C control and dual supply rails
The TLV320DAC32IRHBT is a 24-bit stereo digital-to-analog converter from Texas Instruments, sampling at 96k samples per second per channel. It operates from separate analog (1.8V) and digital (3.3V) supply rails, keeping the analog audio path isolated from the digital switching noise. The digital interface is I²C, so the host microcontroller programs the volume, mute, and power-down registers over a two-wire bus — no extra address lines needed beyond the serial clock and data. The 24-bit resolution and 96 kHz rate cover the full audio band with headroom for 48 kHz or 44.1 kHz base rates.
Package, footprint, and temperature grade
The dual supply sources (analog and digital) mean the analog rail can be a clean 1.8V LDO while the digital rail runs from a noisier 3.3V supply — the internal PSRR handles the cross-talk if the layout keeps the analog return path separate.
Lifecycle and compliance
The ROHS3 compliance covers the full substance restriction, including the four phthalates, so it passes EU and UKCA requirements without an exemption expiry to track.