How to Use PCM5102MK 2.0: Examples, Pinouts, and Specs

The PCM5102MK 2.0 is a high-performance digital-to-analog converter (DAC) manufactured by geediy.com. It is designed specifically for audio applications, delivering high-resolution audio playback with minimal distortion and noise. This component supports a wide range of audio formats and includes integrated digital filtering to enhance sound quality, making it an excellent choice for audiophile-grade projects and professional audio systems.

• High-fidelity audio systems
• DIY audio projects
• Media players and streaming devices
• Audio signal processing
• Home theater systems
• Professional audio equipment

The following table outlines the key technical details of the PCM5102MK 2.0:

The PCM5102MK 2.0 module has the following pinout:

1. Power Supply: Connect the VIN pin to a regulated power supply (3.3V to 5.5V) and the GND pin to the ground of your circuit.
2. I2S Interface: Connect the I2S signals (LRCK, BCK, and DIN) from your microcontroller or audio source to the corresponding pins on the PCM5102MK 2.0.
3. Audio Output: Connect the OUTL and OUTR pins to your audio amplifier or headphones for analog audio output.
4. Format Selection: Use the FMT pin to configure the PCM format. Refer to the manufacturer's datasheet for specific format settings.
5. Optional Control Interface: If needed, connect the SCL and SDA pins to a microcontroller for additional control via I2C.

• Ensure the power supply is stable and within the specified voltage range to avoid damaging the module.
• Use short and shielded wires for the I2S signals to minimize noise and signal degradation.
• Add decoupling capacitors near the power supply pins to reduce power supply noise.
• Avoid directly connecting headphones or speakers to the output pins without an amplifier, as the output is line-level.
• Verify the sampling frequency and bit depth of your audio source to ensure compatibility with the PCM5102MK 2.0.

The PCM5102MK 2.0 can be connected to an Arduino UNO for audio playback using the I2S interface. Below is an example Arduino sketch:

#include <I2S.h> // Include the I2S library for audio playback

void setup() {
  // Initialize the I2S interface in master mode
  if (!I2S.begin(I2S_PHILIPS_MODE, 44100, 16)) {
    // Check if I2S initialization failed
    while (1) {
      // Stay in an infinite loop if initialization fails
    }
  }
}

void loop() {
  // Example: Send a sine wave to the DAC
  for (int i = 0; i < 360; i++) {
    // Generate a sine wave sample
    int sample = 32767 * sin(i * PI / 180);
    I2S.write(sample); // Send the sample to the DAC
  }
}

• The above code assumes the use of the Arduino I2S library, which is compatible with the PCM5102MK 2.0.
• Ensure the I2S pins on the Arduino (e.g., LRCK, BCK, and DIN) are correctly connected to the corresponding pins on the PCM5102MK 2.0.

1. No Audio Output:

   • Verify that the power supply voltage is within the specified range (3.3V to 5.5V).
   • Check the I2S connections (LRCK, BCK, and DIN) for proper wiring.
   • Ensure the audio source is configured to output PCM data compatible with the DAC.

2. Distorted Audio:

   • Confirm that the sampling frequency and bit depth of the audio source match the DAC's capabilities.
   • Use shielded cables for the I2S signals to reduce noise and interference.
   • Check for proper grounding in the circuit.

3. Excessive Noise:

   • Add decoupling capacitors near the power supply pins to filter out noise.
   • Ensure the audio output is connected to a high-quality amplifier or preamp.

Q: Can the PCM5102MK 2.0 handle DSD audio formats?
A: No, the PCM5102MK 2.0 is designed to support PCM audio formats only.

Q: What is the maximum sampling frequency supported by the PCM5102MK 2.0?
A: The module supports sampling frequencies up to 384 kHz.

Q: Can I use the PCM5102MK 2.0 with a 3.3V power supply?
A: Yes, the module operates with a supply voltage range of 3.3V to 5.5V.

Q: Do I need an external clock for the PCM5102MK 2.0?
A: No, the module uses the I2S bit clock (BCK) provided by the audio source.

Q: Is the PCM5102MK 2.0 suitable for portable audio devices?
A: Yes, its compact size and low power consumption make it ideal for portable applications.