Select Language
I2S Audio DAC + Headphone Amplifier
General Description
The ALC5634 is a highly-integrated I2S/PCM interface audio DAC with multiple input/output ports, and is designed for multimedia handheld devices. It provides a Stereo Hi-Fi DAC for playback via the I2S/PCM interface.
To reduce component count, the ALC5634 can connect to:
  • LINEIN_L/R stereo Single-Ended analog inputs that can be configured to Differential analog input
  • AUXIN_L/R stereo Single-Ended analog inputs that can be configured to Differential analog input
  • LINE3_L/R stereo Single-Ended analog inputs
  • Single-Ended stereo Headphone Output
  • STEREO Bridge-Tied Load (BTL) LINE_OUT
Multiple analog input and output pins are provided for seamless integration with analog connected wireless communication devices. Differential input/output connections efficiently reduce noise interference, providing better sound quality.
The ALC5634 AVDD operates at supply voltages from 2.3V to 3.6V. DCVDD and DBVDD operate from 1.8 to 3.6V. To extend battery life, each section of the device can be powered down individually under software control. Leakage current in maximum power saving state is less than 10µA.
The ALC5634 is available in a 5x5mm ‘Green’ QFN-32 package, making it ideal for use in handheld portable systems.
  • Digital-to-Analog Converter with 100dB SNR, and –86dB THD+N at 3.3V
  • Three analog stereo single-ended or one stereo differential input, LINEIN_L/R, AUXIN_L/R, and LINE3_L/R
  • Stereo BTL (Bridge-Tied Load) LINE_OUT
  • Supports playback soft-mute, digital volume, digital AVC
  • Stereo headphone output with on-chip 45mW headphone driver (AVDD=3.3V, 16 load)
  • Supports pop noise suppression with external capacitor
  • Digital power supplies from 1.8V to 3.6V
  • Analog power and headphone power supplied from 2.3V to 3.6V
  • Power management and enhanced power saving
  • Internal PLL can receive wide range of clock input
  • Supports sampling rate 8KHz~192KHz
  • Supports I2C control interface
  • Supports three programmable data interfaces
    • I2S, left justified, or DSP
    • 16/20/24 bits word length
    • Master or Slave clock mode
  • 32-pin QFN 5x5mm package for small footprint
  • Portable media player
  • MP3 player
  • Bluetooth A2DP (Advanced Audio Distribution Profile) headsets
  • Portable Navigation Device (PND)
  • Multimedia phone
Download Page Links


Realtek Wins Three Best Choice Awards at COMPUTEX TAIPEI 2018, including a Best Choice Golden Award
Realtek Launches World’s First Single-Chip 2.5G Ethernet Controller for Multiple Applications, including Gaming Solution
Realtek PCIe GBE Family Controller Series Drivers
Realtek PCIe FE Family Controller Series Drivers
HD Audio Codec Driver
Monthly Revenue Update
About Realtek | Products | Press Room | Downloads | Investor Relations | Employment | Contact Us | FAQs | Site Map
Contact the Webmaster about any website related problems.
Best viewed at 800x600 with
IE 6.0 or Netscape 7.02 or Mozilla Firefox 1.0.6 or higher.
©2018 Realtek Semiconductor Corp. All rights reserved.