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Small green circuit board with 3.5 mm jack and pin headers

Adafruit

Adafruit I2S ADC Audio Card Module 2 in 1 Accessories

SKU CH-8854-13X05

Converts analogue input to 24-bit I2S at up to 192 kHz with selectable master or slave modes and 6 dB gain via 3.5 mm jack

  • Automatic power-on conversion to 24-bit 192k/96k I2S signal
  • Choose 24-bit 192k, 24-bit 96k, 24-bit 48k or 16-bit 48k slave modes
  • Select 24-bit 192k or 24-bit 96k master mode for high performance
  • Converts analog input into I2S digital audio stream
  • 5 mm input with default 6dB amplification for stronger signal

Audio Module for Music Enthusiasts

This Adafruit I2S ADC audio card module converts analog signals into digital I2S streams for lossless audio decoding. It targets hobbyists and developers building custom digital audio projects who need flexible format conversion on a compact development board.

Master and Slave Mode Constraints

The board operates in master mode at 24bit 192k or 24bit 96k, while slave mode adds 24bit 48k and 16bit 48k options. Automatic conversion defaults to 24bit 192k or 96k on power-up, so the host device must accept one of those sample rates for plug-and-play use.

Power and Connection Checks

Verify your host can supply the required logic voltage and that the 3.5 mm input matches your analog source. Confirm the target DAC or processor supports the chosen master or slave sample rate and bit depth before integrating the module into your signal chain.

Highlights

  • Automatic power-on conversion to 24-bit 192k/96k I2S signal
  • Choose 24-bit 192k, 24-bit 96k, 24-bit 48k or 16-bit 48k slave modes
  • Select 24-bit 192k or 24-bit 96k master mode for high performance
  • Converts analog input into I2S digital audio stream
  • 5 mm input with default 6dB amplification for stronger signal

Specifications

No published specifications for this item yet.

Questions about this item

Should I pick master mode at 24-bit 192 kHz or slave mode at 16-bit 48 kHz for my build?

Choose master mode at 24-bit 192 kHz when the board must drive the clock itself; choose a slave mode such as 16-bit 48 kHz when an external device supplies the clock and you need lower data rates.

What does the 24-bit 192 kHz figure mean once the card is installed in a system?

It means the module can convert analogue input to a 24-bit I²S stream sampled at 192 kHz, giving high-resolution digital audio for recording or processing.

Does the 3.5 mm jack use a standard line-level interface or something proprietary?

The 3.5 mm jack accepts a standard analogue line-level signal and applies a fixed 6 dB gain before the ADC converts it to I²S.

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