New Product - Advanced Audio -

2016/01/22 (updated 2016/01/25)

AK4436/AK4438: 6ch/8ch audio D/A converter have been developed for multi-channel audio systems

[Product Name]

AK4436VN, AK4438VN

108dB 768kHz 32-bit 6ch/8ch Advanced D/A Converter
Audio Amplifier for Cars, Car Audio, AV Receivers, Surround Sound Systems, CD/SACD Players,
Network Audio, Sound Bars/Plates, Audio Mixers



There is an increasing need for high-resolution audio playback in the automotive industry but system power consumption targets are being reduced.  This factor is limiting the D/A converter power supply to 3.3V.

Asahi Kasei Microdevices Corporation (AKM) has developed 32-bit 6ch/8ch advanced audio D/A converters (DAC) that support 3.3V power supply with 1.8V interface voltage making it compatible with the latest processor platforms available today.  The AK4436/AK4438 are optimized for multi-channel audio systems with a focus on sound quality, power consumption and exception audio characteristics. The AK4436/AK4438 realizes detailed sound expression with high resolution 32-bit processing by AKMs proprietary VELVET SOUND architecture that has been widely adopted by well-established high-end audio companies, and also achieves a low power consumption operation required by automotive systems.

This line-up including the AK4432, a 2ch advanced DAC released Jun 2015, provides simple and optimal solution to any multichannel system by adopting the flexible TDM interface. This AK443x series utilizes a single-ended output version of the premium DAC, AK445X series.

● Dynamic sound play back with large amount of playback information:
- AKMs VELVET SOUND architecture is utilized.
- By a low distortion technology, the AK4436/AK4438 achieves -91dB distortion, the best performance in the field as a DAC that has 108dB S/N performance.
- Out of Band Noise is greatly reduced by OSRD (Over Sampling Ratio Doubler) technology.
- IRD (Impulse Response Designed) filters are integrated with 32-bit processing to reproduces detailed natural sound.
- Five different digital filters types are selectable according to the user audio and system preferences.
- The digital input supports up to 768 kHz PCM, recreating high-resolution sound that is as close as possible to the original acoustic source.
- It is suitable for high-resolution sound source playback that is becoming popular with Network Audio, USB DACs and Car Audio Systems.

● Low Power Consumption
- The new device achieves low power consumption performance that is about 13mW per channel (AK4436VN: 79mW, AK4438VN: 102mW).

● System Extensibility
By adding 6ch and 8ch line-ups, AKM can provide the best D/A converter combination for audio amplifier for multiple audio applications such as audio amplifier for cars and AV receivers. The digital input supports TDM (Time Division Multiplexing) signals, realizing daisy chain connection and simplifying the design of multi-channel playback systems.
AK4438VN Advanced DAC AK4438VN
AK4436VN Advanced DAC AK4436VN

3rd Generation 32-bit Advanced D/A Converter

 Product Name
 Advanced D/A Converter
 Advanced D/A Converter

 Advanced D/A Converter
 Number of Channel
 8ch 6ch  2ch
 DR, S/N  108dB
 THD+N  -91dB
 Sampling Rate
 8kHz to 768kHz
  8kHz to 192kHz
 DSD Input
 Not Supported
 Sound Color  Five Types
 32-bit 8-fold Digital Filters
 - Short Delay Sharp Roll-off, GD=5.8/fs
 - Short Delay Slow Roll-off, GD=4.8/fs
 - Sharp Roll-off
 - Slow Roll-off
 - Super Slow Roll-off
   Four Types
 32-bit 8-fold Digital Filters
 - Short Delay Sharp Roll-off, GD=5.9/fs
 - Short Delay Slow Roll-off, GD=5.2/fs
 - Sharp Roll-off
 - Slow Roll-off
 Output Method
 Single-ended output with internal smoothing filter
   VELVET SOUND Technology
  - Low-distortion technology
  - OSRD(Over Sampling Ratio Doubler) technology
   ・Low-distortion technology
 Power Consumption
 102mW  79mW  25.7mW
 Power Supply
 Analog: 3.0 to 3.6V
 Digital: 3.0 to 3.6V
 Operation Temperature
 -40 to105°C
 32-pin QFN (5mm x 5mm)
 16-pin TSSOP (4.4mm x 5mm)
 Sales Start
 ES: Feb/2016 *
 Mass Production: Summer/2016 *
 Available Now

    Distributors/ Representatives

 Global Web Distributor

VELVET SOUND is a brand concept of, “sound philosophy”, given to AKM’s new generation of audio devices and, “new architecture & core technologies”. A new circuit is designed to, “balance the amount of information and intensity”, and, “focus on the original sound”, to achieve rich musicality and high performance. This circuit contains specifications and features suitable for the high-resolution audio era.


About "Audio 2 Go"

Audio 2 Go™ products are designed for portable audio applications, including smartphones, tablet computers and media players, which provide feature-rich, single chip solution with low power consumption and high audio fidelity.

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* Information on this page is current on the date of press release.
* AKM, VELVET SOUND Logo™ and Audio 2 Gro™ are trademarks of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States.