PCM1808 Audio ADC Converter Module – Stereo Analog to I2S

The PCM1808 Audio ADC Converter Module is a compact, high-performance stereo analog-to-I2S signal adapter designed for electronics enthusiasts, students, hobbyists, and engineers. Whether you're building a DSP project, experimenting with digital audio processing, or integrating audio capture into a microcontroller system, this module delivers clean, reliable analog-to-digital conversion in a tiny 5×4 cm (2×1.6 in) form factor.

Built with a durable plastic and metal construction and finished in a distinctive green PCB, this board is engineered for precision. The onboard PCM1808 chip from Texas Instruments is a single-ended analog input, 24-bit delta-sigma stereo ADC capable of sampling rates up to 96 kHz — making it ideal for high-fidelity audio capture applications.

Key Features

• PCM1808 ADC Chip: Industry-standard 24-bit stereo analog-to-digital converter for high-quality audio capture
• I2S Digital Output: Standard I2S interface for seamless integration with microcontrollers, FPGAs, DSPs, and SBCs (e.g., Arduino, Raspberry Pi, ESP32)
• Stereo Input: Accepts stereo analog audio signals via 3.5mm or direct pin input
• Compact Size: 5×4 cm (approx. 2×1.6 in) — fits neatly on a breadboard or in a project enclosure
• Durable Build: Plastic and metal construction for lasting reliability in lab and field use
• Green PCB: High-quality green circuit board for easy component identification
• Wide Application: Perfect for DSP experiments, audio recording projects, signal processing studies, and electronic prototyping

Specifications

• Chip: PCM1808 (Texas Instruments)
• Resolution: 24-bit
• Interface: I2S digital output
• Input: Stereo analog audio
• Dimensions: 5×4 cm / 2×1.6 in
• Material: Plastic + Metal
• Color: Green (PCB)

Who Is This For?

This module is a must-have for electronics students tackling audio DSP coursework, makers building their own digital audio workstations, and engineers prototyping audio capture systems. It also makes a great gift for anyone passionate about electronics and audio engineering.

For further reading on digital audio standards and signal processing, visit the National Institute of Standards and Technology (NIST) – Electronics resource page.

Frequently Asked Questions

Q: What does the PCM1808 Audio ADC Converter Module do?

A: The PCM1808 module converts stereo analog audio signals into a digital I2S output. This makes it ideal for connecting microphones or line-level audio sources to microcontrollers, FPGAs, DSPs, and single-board computers such as Arduino, ESP32, or Raspberry Pi for digital audio processing projects.

Q: What interfaces and microcontrollers is this module compatible with?

A: The module outputs a standard I2S digital audio signal, which is natively supported by a wide range of platforms including Arduino (with I2S library), ESP32, STM32, Raspberry Pi, and most FPGAs and DSP development boards.

Q: What are the dimensions and build quality of this module?

A: The PCM1808 Audio ADC Converter Module measures 5×4 cm (approximately 2×1.6 in) and is constructed from durable plastic and metal components on a standard green PCB, making it robust enough for both lab experiments and prototyping environments.

Q: Is this module suitable for students and beginners?

A: Absolutely. Its compact size, standard I2S interface, and straightforward pinout make it an excellent choice for students and hobbyists exploring digital audio, signal processing coursework, or electronic experiment projects for the first time.