PCM5102A DAC Decode I2S Audio Player Module

PCM5102 I2S Digital Audio DAC Decoder Module is a high-quality stereo Digital-to-Analog Converter designed to elevate the audio output of microprocessors and single-board computers like the Raspberry Pi, ESP32, and Arduino. This module efficiently receives digital audio data via the I2S (Inter-IC Sound) interface and converts it into a crystal-clear, analog signal ready for amplification or direct headphone use via its onboard 3.5mm stereo jack. Crucially, the PCM5102 uses an advanced architecture that does not require an external Master Clock (MCLK) for operation, simplifying your wiring and reducing clock jitter, which translates directly to superior sound quality. If you are building a custom music player, streamer, or high-fidelity audio system, this DAC provides a significant upgrade over the often-noisy, low-resolution analog output found on many development boards.

Key Features:

• High-Fidelity Sound: Utilizes the PCM5102 chip, which delivers a high Signal-to-Noise Ratio (SNR) and low distortion for clear, rich audio reproduction.
• I2S Interface: Accepts digital audio data directly from microcontrollers, bypassing noisy analog paths for maximum signal integrity.
• No MCLK Required: The integrated phase-locked loop (PLL) generates its own clock signal, simplifying wiring and reducing potential clock jitter errors.
• Integrated Headphone Jack: Features an onboard 3.5mm stereo audio output connector, allowing you to connect headphones or external amplifiers instantly.
• Wide Sample Rate Support: Handles a broad range of audio sample rates and resolutions, making it compatible with various digital audio sources.
• Power Supply Range: Operates efficiently across a standard voltage range commonly supplied by embedded platforms.

Technical Specifications:

• DAC Chip: Texas Instruments PCM5102
• Interface: I2S (Digital Audio)
• Resolution: 24-bit
• Sample Rate: Up to 384 kHz
• Operating Voltage (V_CC): 3.3V to 5V (Logic Level Varies)
• Analog Output: 3.5mm Stereo Jack
• Signal-to-Noise Ratio (SNR): Typically 106 dB

Mechanical Specifications:

• Mounting: Four mounting holes for easy securing to an enclosure or chassis.
• Input Connector: Standard 6-pin male header for I2S and power connections.
• Output Connector: 3.5mm Female Stereo Jack.
• Material: FR4 PCB with clear silkscreen labels.

Dimensions:

• Length: ~30 mm
• Width: ~25 mm
• Height: ~10 mm (including the jack)

Pinout and Wiring:

• VCC: Connect to 3.3V power supply (or 5V, depending on the board version).
• GND: Connect to the common circuit ground.
• SCK (BCLK): Bit Clock Input. Connects to the BCLK pin of your microcontroller.
• LRCK (WS): Left/Right Clock (Word Select). Connects to the WS pin of your microcontroller.
• DATA (DIN): Serial Data Input. Connects to the DIN pin of your microcontroller.
• DEMP / FLT: De-emphasis/Filter Pin (Typically tied high or low internally or to ground, check module markings).
• Wiring Note: Ensure the logic level of your host device (e.g., Raspberry Pi 3.3V) matches the operating voltage of the DAC module for stable I2S communication.

Datasheet Reference:

• Download PCM5102 Datasheet

Commonly Used in:

• Raspberry Pi Audio: The standard add-on for achieving high-quality audio output on Raspberry Pi models (Zero, 3, 4).
• IoT Audio Devices: Implementing voice prompts and music playback on Wi-Fi-enabled microcontrollers like the ESP32.
• DIY Streamers: Building network-enabled high-resolution music streamers (e.g., using Volumio or Moode Audio).

Applications:

• High-Quality Headphone Amplifier Feed: Provides a clean analog signal to drive a dedicated headphone amplifier.
• Digital Audio Player (DAP) Builds: Acts as the core decoding stage for portable or desktop music players.
• Home Automation Audio: Delivering clear, consistent background music or notification tones across a system.

Equivalent Models:

• MAX98357A (I2S Amplifier): Similar I2S input but integrates a small Class D amplifier to directly drive a speaker.
• PCM5122: A slightly more advanced TI DAC with integrated volume control and DSP features.

Package Includes:

• 1 x PCM5102 I2S Digital Audio DAC Decoder Module – 3.5mm Stereo Output