PCM5102A I²S DAC module — 32-bit 384kHz hi-fi stereo audio for Raspberry Pi and ESP32

The PCM5102A DAC module is built around the Texas Instruments PCM5102A — a high-performance 32-bit stereo audio DAC with an integrated PLL and line-level output driver. It accepts I²S digital audio input and delivers clean, high-fidelity analog stereo output via a 3.5mm headphone/line jack. With a 112dB SNR and support for sample rates up to 384kHz, it is the go-to DAC module for audiophile-grade audio projects with Raspberry Pi, ESP32, and other I²S-capable microcontrollers.Key Specifications: DAC IC: Texas Instruments PCM5102A Resolution: 32-bit Sample rate: up to 384kHz (supports 8kHz – 384kHz) SNR: 112dB (A-weighted) THD+N: −93dB Dynamic range: 112dB Output: 3.5mm stereo line/headphone jack Interface: I²S (BCK, LRCK, DIN) Supply voltage: 3.3V – 5V (onboard LDO regulator) Output voltage: 2.1V RMS (line level) Built-in PLL: yes (no MCLK required) FMT pin: I²S format selection (left-justified or I²S standard) Dimensions: ~25mm × 25mm Pinout: VIN: 3.3V – 5V power input GND: Ground BCK: I²S bit clock DIN: I²S data input LCK (LRCK): I²S left/right clock (word select) SCK: System clock (leave unconnected if using internal PLL) FMT: Format select (GND = I²S, 3.3V = left-justified) XSMT: Soft mute (pull high to enable output) OUT: 3.5mm stereo output jack Compatible With: Raspberry Pi (all models with I²S — use as HiFiBerry-style DAC) ESP32 (I²S peripheral) Arduino (with I²S library or bit-banging) STM32 (I²S peripheral) Any microcontroller with I²S output Raspberry Pi Setup: Connect BCK → GPIO18 (PCM_CLK), LRCK → GPIO19 (PCM_FS), DIN → GPIO21 (PCM_DOUT) Add dtoverlay=hifiberry-dac to /boot/config.txt Set ALSA default output to the DAC device Applications: Hi-fi audio output for Raspberry Pi media players ESP32 Bluetooth/Wi-Fi audio receivers DIY audiophile DAC projects Digital audio workstation (DAW) output interfaces Internet radio and streaming audio players Portable high-resolution audio players