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

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

Multi Core DSP with Digital Audio Hub

AK7707VQ As it is a multi-core DSP (Digital Signal Processor), AKM’s original simple voice recognition algorithm can be used.  A high performance noise canceller and echo canceller process can be used simultaneously, including the addition of surround sound.  In addition, the AK7707 includes six asynchronous stereo SRC’s.
● High Performance HiFi 2 Core and AKM’s Original DSP Core
The 7707 integrates a one HiFi 2 DSP by Cadence and two of AKM’s original DSPs that process sample by sample.
● Supporting Multi Channels by Digital Audio Hub and SRC
The AK7707 has multiple clock settings, six asynchronous SRCs, and eight TDM supporting ports for each input and output, (Input: max 64ch, Output: max 64ch, in TDM Mode).
● Heat Dissipation in a Small Package
The AK7707 is housed in a 64-pin HTQFP package (10mmx10mm), which is suitable for compact system design with its good head dissipation.

DSP with Mono ADC Stereo CODEC + Mic/Lineout

AK7755EN The AK7755 is a highly integrated digital signal processor, including a mono ADC, a stereo audio CODEC, a MIC pre-amplifier, a line-out amplifier and digital audio I/F.  The audio DSP has 2560step at fs = 48kHz parallel processing power.  As the AK7755 is a RAM based DSP, it is programmable for user requirements such as high performance hands free function and acoustic effects.  The AK7755 is available in a space saving small 36-pin QFN package.

Multi Core DSP with 5ch ADC, 4ch DAC, 8ch SRC

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.
VELVET SOUND ● 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

Selection Table

Part# Data
Max fs Ch#
DSP In/Out
Data RAM Vdd Package

kHz Ch dB Ch MHz word V  
AK4679EG482/292/928/890184321) 3.0 to 5.5

2) 1.7 to 2.0

3) 1.6 to 3.6

4) 1.1 to 1.3

AK4962ECB3844/4102/12510/10122.88225281.7 to 1.9
Yes964/6106/1086/6123.45761441) 3.0 to 3.6
2) 3.0 to 3.6
3) 3.0 to 3.6
4) 1.7 to 3.6 
AK7707VQYes192-- / ---- / --64/64 (TDM)294.912 (DSP1) / 221.184 (DSP2,3)384KB (DSP1) / 34k (DSP2,3)1) 1.14 to 1.3
2) 3.13 to 3.47
3) 1.70 to 3.47
4) 3.13 to 3.47 
AK7719BECB48-- / ---- / --8 / 890184321) 1.1 to 1.3
2) 1.6 to 3.6
AK7719ECB48-- / ---- / --8 / 890184321) 1.1 to 1.3

2) 1.6 to 3.6

AK7735AVQYes1924/4106/1088/8147.456163841) 3.0 to 3.6
2) 3.0 to 3.6
3) 3.0 to 3.6
4) 1.7 to 3.6   
AK7735EQ1924/4106/1088/8147.456163841) 3.0 to 3.6
2) 3.0 to 3.6
3) 3.0 to 3.6
4) 1.7 to 3.6
AK7736BVQYes96-- / ---- / --8/8123.457204801) 3.0 to 3.6

2) 1.7 to 3.6

AK7754EN482 / 289 / 964 / 573.5296144

1) 3.0 to 3.6

2) 3.0 to 3.6

3) 1.7 to 1.9

4) 3.0 to 3.6

AK7755EN963/2102/1068/8122.88122881) 3.0 to 3.6

2) 1.7 to 3.6

3) 1.14 to 1.3

AK7757VQYes483 / 496 / 1077 / 1073.52910240

1) 3.0 to 3.6

2) 3.0 to 3.6

3) 1.7 to 1.9


1) 3.0 to 3.6
2) 3.0 to 3.6
3) 1.14 to 1.3
4) 1.7 to 3.6


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