PCM1808 24bit SNR Audio Stereo ADC Single-Ended Analog-Input Decoder Amplifier Board

PCM1808 24bit SNR Audio Stereo ADC Single-Ended Analog-Input Decoder Amplifier Board is a high-performance, cost-effective CMOS chip that delivers professional-grade analog-to-digital conversion for stereo audio applications. This module utilizes a delta-sigma modulator with 64-times oversampling, which ensures excellent dynamic range and high-fidelity sound capture. Furthermore, the single-ended analog input design simplifies the interface between various audio sources and digital processing units. Engineers can easily integrate this board into digital audio recorders or wireless audio transmitters where high Signal-to-Noise Ratio (SNR) is a priority. Consequently, the PCM1808 provides a reliable bridge between traditional analog signals and modern digital environments. Therefore, you should consider this module for any project requiring 24-bit resolution and a high level of audio transparency.

Key Features:

• High-Resolution Conversion: The 24-bit Delta-Sigma ADC architecture provides superior bit depth for capturing intricate audio details.
• Excellent Dynamic Performance: It features a typical Dynamic Range of 99 dB and a Signal-to-Noise Ratio of 99 dB, ensuring minimal background hiss.
• Single-Ended Input: The hardware design accepts standard single-ended analog signals, eliminating the need for complex differential conversion circuits.
• On-Chip Functionality: Includes a built-in anti-aliasing filter and a digital high-pass filter to remove DC offset components from the audio signal.
• Master/Slave Mode Support: The board functions in either Master or Slave mode, offering flexibility in system clock synchronization and I2S data communication.

Technical Specifications:

• Resolution: 24-Bit Stereo ADC
• Sampling Rate: Up to 96 kHz
• Signal-to-Noise Ratio (SNR): 99 dB (Typical)
• Dynamic Range: 99 dB (Typical)
• Total Harmonic Distortion + Noise (THD+N): −93 dB (Typical)
• Supply Voltage (Analog/Digital): 5.0 V (V_CC) and 3.3 V (V_DD)
• Interface Format: I²S, Left-Justified
• Operating Temperature: −40°C to +85°C

Mechanical Specifications:

• PCB Material: High-grade FR-4 with tinned solder pads
• Mounting: Through-hole pin headers for easy breadboard or PCB integration
• Input Type: Single-Ended Analog Input via pads or pins
• Finish: Blue or Black solder mask with clear white silkscreen labeling

Dimensions:

• Board Length: ≈ 22 mm
• Board Width: ≈ 19 mm
• Height: ≈ 3 mm (excluding headers)
• Pin Pitch: 2.54 mm (Standard)

Pinout and Wiring:

• LIN / RIN: Left and Right analog audio inputs.
• VCC: 5V Analog Power Supply input.
• VDD: 3.3V Digital Power Supply input.
• GND: Common Ground for both analog and digital signals.
• BCK (Bit Clock): Clock for I²S data bit timing.
• OUT (Data): Digital audio output stream in I²S format.
• LRCK (Word Clock): Identifies Left or Right channel data.
• SCK (System Clock): Master clock input for the internal logic operations.

Datasheet Reference:

• Download Texas Instruments PCM1808 Datasheet

Commonly Used in:

• Digital Audio Mixers: Converting multiple analog inputs into digital streams for processing.
• Home Theater Systems: Serving as the primary ADC for analog auxiliary inputs.
• Wireless Audio Links: Bridging analog microphones or instruments to digital Bluetooth or Wi-Fi modules.

Applications:

• AV Receivers: Capturing high-fidelity audio from turntables or media players.
• Voice Recognition Systems: Providing a clean digital signal for software-based voice processing.
• Instrumentation: Converting low-frequency analog sensor signals into high-resolution digital data.

Equivalent Models:

• PCM1807: A lower-spec variant that offers similar pinout but with slightly lower SNR.
• CS5343 (Cirrus Logic): A popular alternative 24-bit ADC with comparable dynamic range.
• WM8782 (Wolfson): However, check for specific clock requirements as they may vary from the PCM1808.

Package Includes:

• 1 x PCM1808 24bit Audio Stereo ADC Decoder Module Board