Automotive Audio

All for Absolute Sound

The VELVET SOUND taken over genealogy of the Premium Audio Technology is realized in various scenes.

The advanced audio devices enable natural sound recording technology used in today's recording studios enabling a PCM recorder, and state-of-the-art Hi-Fi sound playback technology used in professional level audio equipment.

AKM's advanced audio devices optimized car infotainment equipment lead new era of the high-resolution digital audio.

PRODUCT CATEGORY

DSPs

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AK7604VQ

Audio processer for automotive head-units supporting playback of high resolution sound sources

AK7604VQ

AK7604 is an audio processor optimized for processing high resolution music sources in automotive sound systems.  A portion of the specifications from the DSP core, Audio I/O, A/D converter, and D/A converter of the AK7738 were adopted in the AK7604.

Features were optimized and slimmed down, using only the necessary blocks for audio in the AK7604.  The part is suitable for car audio/navigation systems in entry or consumer classes. This is a successor to the AK7602.

  • 28-bit pseudo floating-point arithmetic achieves various sound effect processes 
  • Audio processing parameters can be adjusted easily 
  • Audio systems can be built flexibly

AK7735AVQ

New update to High Resolution Audio Dedicated Processors

AK7735AVQ

AKM has made improvements to the AK7738 which has been adopted in various in-vehicle head units for processing high resolution sound sources.  It is now more affordable with all necessary functions in the new series.  A 28-bit audio DSP supporting floating point arithmetic adopts, “VELVET SOUND”, technology established with high-end audio products.

The automotive grade AK7735A and the consumer grade AK7735EQ are both now available to the market.

  • Making Established Dedicated DSP Audio Affordable
  • VELVET SOUND Technology
  • Building a Flexible Audio System

AK7738VQ

New Generation Audio/Voice Processor with Multi Core

AK7738VQ

The AK7738 is an audio/voice digital signal processor that realizes high performance hands-free voice process in addition to audio process. Surround sound processing and high performance noise and echo cancellations can be executed simultaneously by the Multi Core DSP (Digital Signal Processor). This device integrates two stereo ADC’s (A/D converter), one monaural ADC, two stereo DAC’s (D/A converter) and four asynchronous SRC’s (Sample Rate Converter). Advanced 32-bit DAC’s are adopted for analog outputs, realizing a high-quality playback of high-resolution sound sources. The AK7738 is suitable for car audio, display audio, car navigation systems and hands-free systems.

  • Digital Block | Multi Core DSP supporting 28-bit Floating Point Arithmetic
  • Variable Software is Available | Realizing High Quality Audio and High Performance Hands-free Talk
  • Analog Block | Central Control of Analog/Digital Input and Output by "AudioHUB"
  • High Quality Audio Playback | Integrate Advanced 32-bit DACs That Adopts VELVET SOUND Technology

AK7739VQ

High resolution DSPs for audio and voice processing

AK7739VQ

AK7739VQ AKM's audio processors have been updated for scenarios such as listening to wireless sound at home or while driving and talking on a hands-free call. A 32-bit audio DSP supporting floating point arithmetic adopts, “VELVET SOUND”, technology established with high-end audio products.

The AK7739 is capable of processing sound and voice such as for hands-free function simultaneously because two DSPs are able to work on different but synchronized sampling frequencies. The automotive grade AK7739VQ that integrates a CODEC and the AK7737VQ with ADC are both now available to the market.

  • Updating Established Dedicated DSP Audio 
  • VELVET SOUND Technology
  • Building a Flexible Audio System 
  • Package: 64-pin HTQFP (10 x 10mm, 0.5mm pitch) 

DSPs for Automotive

Part Number Status Ch#
AD/DA
Resolution S/N
AD/DA
THD+N * 
DAC
max
Fs *
Sound
Color *
Vdd Ch#
DSP In/Out
Ch#
SRC
Clock
Speed(max)
Data
RAM
Package Operation
Temp.
Automotive
Qualified
Others
    Ch bit dB dB kHz   V     MHz word      
AK7604VQ MP 4/6 24 / 24 106/108   96   1) 3.0 to 3.6
2) 3.0 to 3.6
3) 3.0 to 3.6
4) 1.7 to 3.6
6/6 8 123.457 6144 48LQFP -40 to 85 Yes AudioHUB
AK7735AVQ MP 4/4 32 106/108   192 4 types 1) 3.0 to 3.6
2) 3.0 to 3.6
3) 3.0 to 3.6
4) 1.7 to 3.6&
8/8 4 147.456 16384 48LQFP -40 to 85 Yes  
AK7738VQ NRND 5/4 32 102/108 -91 192 4 types 1) 3.0 to 3.6
2) 1.7 to 3.6
12/12 8 122.88 x 3 30720 64LQFP -40 to 85 Yes AudioHUB
AK7739VQ MP 4/4 32 102/108 -91 192 4 types 1) 1.14 to 1.3
2) 1.7 to 3.6
3) 3.13 to 3.6
12/12 12 294.912 55296 64HTQFP -40 to 85 Yes AudioHUB

[Notes]

* THD+N: Total Harmonic Distortion plus Noise
* max Fs: Maximum Sampling Frequency
* Sound Color: AKM original digital filter

* Schedules of Samples and Production are subject to be changed without notice.
* The information in the datasheet is subject to be changed without notice.

* Schedules of Samples and Production are subject to be changed without notice.* The information in the datasheet is subject to be changed without notice.

D/A Converters (DAC)

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AK4436VN AK4438VN

108dB 768kHz/32-bit 6/8ch Advanced Audio DAC

AK4438VN

The AK4436/AK4438 realizes detailed sound expression with high resolution 32-bit processing by 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 car audio systems. They are optimized for multi-channel audio systems in the aspects of sound quality, power consumption and characteristics.

  • Maximum Sampling Frequency, Bit rate : PCM 768kHz/32-bit
  • SNR : 108dB
  • THD+N : -91dB
  • Sound Color Digital Filter : 5 types

AK4432VT

108dB 192kHz/32-bit 2ch Advanced Audio DAC

AK4432VT

The AK4432VT is an advanced audio 32-bit DAC, with 2-channels AKM’s VELVET SOUND architecture that has been widely adopted by well-established high-end audio companies. The digital input supports up to 192 kHz PCM, allowing for high-resolution audio source playback. This advanced audio DAC is capable of TDM daisy chain connection enabling up to eight channels configuration when paired with other AKM devices. The AK4432 has a clock synchronization function effective when multiple are used in the system and is performance matched with AKM’s quickly becoming popular automotive audio & voice processor, the AK7738, to expand the number of audio DAC channels for the system.

  • Maximum Sampling Frequency, Bit rate : PCM 192kHz/32-bit
  • SNR : 108dB
  • THD+N : -91dB
  • Sound Color Digital Filter : 4 types

D/A Converters for Automotive

Part Number Status Ch# Resolution S/N THD
+N *
max
Fs *
DSD * 
Input
Sound
Color *
Power
Consumption
Vdd Analog
Output
Package Operation
Temp.
Automotive
Qualified
      bit dB dB kHz MHz   mW V        
AK4432VT MP 2 32 108 -91 192 No 4 types 25.7 3.0 to 3.6
Single 16TSSOP -40 to 105 Yes
AK4436VN MP 6 32 108 -91 768 No 5 types 79 3.0 to 3.6 Single 32QFN -40 to 105 Yes
AK4438VN MP 8 32 108 -91 768 No 5 types 102 3.0 to 3.6 Single 32QFN -40 to 105 Yes

[Notes]

* THD+N: Total Harmonic Distortion plus Noise
* max Fs: Maximum Sampling Frequency
* DSD: Direct Stream Digital
* Sound Color: AKM original digital filter

* Schedules of Samples and Production are subject to be changed without notice.
* The information in the datasheet is subject to be changed without notice.

A/D Converters (ADC)

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AK5736VN

6ch A/D Converter for Microphones suitable for automotive active noise cancellation

AK5736VN

AKM has developed a 6ch A/D converter, the AK5736 for microphones in Active Noise Cancellation, systems implemented in car audio. The AK5736 features the low latency of 4.3 [1/fs] required for high speed processing with built-in capability to supply microphone power internally. The AK5736 also has a diagnostic function to monitor microphone connection. As a new feature, the AK5736 has an analog gain circuit setting to set a high gain level thus keeping high.

  • Signal Processing with Low Latency
  • Microphone Power Supply Output (External power supply for microphones is not necessary)
  • Microphone Connection Monitoring

AK5522VN

32-bit A/D Converter with Enhanced Environmental Noise Tolerance

AK5522VN

For car audio amplifiers, high environmental noise tolerance from DC-DC converter power supplies are required. Suitable to this need, AKM has released the AK5522VN, an automotive stereo A/D converter, (ADC), with enhanced resistance to power supply noise and system board noise. Directly connecting the DC-DC converter output to the AK5522VN as a power supply is possible, accomplishing a rich sound field and bass expressions, and distortion-free recording regardless of usage environment.

In addition, analog characteristics such as the dynamic range are optimized based on VELVET SOUND (TM) technology that has been widely adopted by well-established high-end audio companies.

AK5534VN AK5536VN AK5538VN

111dB 768kHz/32-bit 4/6/8ch Advanced Audio ADC

AK5538VN

The AK553x capture incredible detailed and the true sound expression with its high resolution 32-bit processing by AKMs proprietary VELVET SOUND architecture that has been widely adopted by well-established high-end audio companies. This high resolution processing and noise tolerance designs of the AK553x realize a low distortion recording. Digital output supports unsurpassed high resolution sound, up to 768 kHz sampling rate and 11.2 MHz DSD output is available.

  • Maximum Sampling Frequency, Bit rate : PCM 768kHz/32-bit, DSD 11.2MHz 
  • SNR : 111dB
  • THD+N : -103dB
  • Sound Color Digital Filter : 4 types

A/D Converters for Automotive

Part Number Status Ch# Resolution S/N THD
+N *
max
Fs *
DSD * 
Output
Sound
Color *
Power
Consumption
Vdd Analog
Input
Package Operation
Temp.
Automotive
Qualified
Others
      bit dB dB kHz MHz   mW V        
AK5736VN MP 6 24 100 -92 192       3.0 to 3.6 Diff / Single 48QFN -40 to 105 Yes Mic-diagnostics, Cascade TDM I/F
AK5522VN MP 2 32 108 -98 192       5.0/3.3 Diff 24QFN -40 to 105 Yes  
AK5534VN MP 4 32 111 (117 *) -103 768 11.2 4 types 96 3.0 to 3.6 Diff 48QFN -40 to 105 Yes  
AK5536VN MP 6 32 111 (118 *) -103 768 11.2 4 types 142 3.0 to 3.6 Diff 64QFN -40 to 105 Yes  
AK5538VN MP 8 32 111 (120 *) -103 768 11.2 4 types 182 3.0 to 3.6 Diff 64QFN -40 to 105 Yes  

[Notes]

* THD+N: Total Harmonic Distortion plus Noise
* max Fs: Maximum Sampling Frequency
* DSD: Direct Stream Digital
* Sound Color: AKM original digital filter

* Schedules of Samples and Production are subject to be changed without notice.
* The information in the datasheet is subject to be changed without notice.