Product Overview

Core Product Advantages

1. TI PCM5102 High-End Audio Chip, Excellent Sound Performance
   Original PCM5102 decoding IC, SNR up to 112dB, total harmonic distortion -93dB, direct 2.1V RMS analog audio output. No high-frequency noise spikes, full and deep low-frequency response, richer sound details, better overall performance than ES9023 decoding modules.
2. Built-in PLL Clock, No External MCLK Required
   Integrated internal PLL generates MCLK automatically after receiving I2S signal, simplifies wiring, avoids asynchronous clock distortion issues, greatly reduces host resource occupation and compatibility troubles.
3. High Sampling & Bit Depth Support
   Supports up to 32-bit audio data and 384KHz sampling rate, compatible with mainstream lossless audio formats such as FLAC, APE, WAV, fully restore original music details.
4. Dual I2S Signal Mode Switchable
   Hardware jumper supports I2S standard / left-justified signal input, matches most single-chip microcomputers, Raspberry Pi series boards and audio main control equipment.
5. Wide Voltage Input & Stable Power Circuit
   DC 5V~10V wide-range power supply, onboard filter electrolytic capacitor and multi-stage power filtering circuit, effectively suppress power supply noise, reduce audio bottom noise, cleaner output sound.
6. Dual Gold-Plated RCA Audio Output
   Gold-plated RCA female sockets for left/right channel analog audio output, low signal loss, anti-oxidation, long service life; standard 2.54mm pitch pin header with clearly printed pin definitions for easy wiring.

Full Technical Specifications

Pin Definition

1. VCC: Power positive pole, connect DC 5~10V
2. GND: Common power ground
3. BCK: I2S bit clock signal
4. LCK / LRCK: I2S left-right channel clock
5. DATA: I2S audio data signal

Wiring & Operation Guide

1. Power Connection: Connect VCC to 5~10V positive voltage, GND to power ground; strictly avoid reverse power connection or over 10V input voltage, which will burn the module.
2. I2S Signal Wiring: Connect BCK, LRCK, DATA and GND to the corresponding I2S pins of the main controller.
3. Signal Mode Selection: Toggle the onboard jumper to switch I2S / left-justified signal format according to the main controller output standard.
4. Audio Output: Plug RCA audio cable into the two gold-plated sockets, connect the other end to power amplifier or active speakers to play sound.

Application Scenarios

• Raspberry Pi DIY HiFi lossless music player, network broadcast audio terminal
• STM32 / ESP32 embedded digital audio playback equipment development
• DIY desktop audio decoder, Bluetooth audio receiver supporting analog output
• Student electronic audio experiment, single-chip I2S audio learning project
• Small household audio equipment, industrial digital audio conversion module

Important Usage Notes

1. Do not reverse VCC and GND power pins, input voltage cannot exceed 10V, otherwise the decoding chip will be permanently damaged.
2. The module outputs analog audio signal directly, need to be matched with power amplifier or active speakers, cannot drive headphones directly.
3. Use shielded audio cables for long-distance RCA wiring to reduce external electromagnetic interference and avoid background noise.
4. The onboard filter capacitor is sensitive to high temperature; avoid long-term high-temperature environment during use.
5. Minor differences in PCB silkscreen and component color among batches will not affect audio decoding performance.