News Release

- New Product Information -

2018/06/26
New update to AKM’s High Resolution Audio Dedicated Processors

Product Name
AK7735AVQ/AK7735EQ
Category :
Audio & Voice Processors
Title
Dual Core Audio Processor
(4ch ADC + 4ch DAC + 4ch SRC)
Applications

Car Audio, Car Navigation Systems, Wireless Speakers
AK7735AVQ
AK7735AVQ

Description

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. AKM introduces the new AK7735 series.
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.

Features

● Making Established Dedicated DSP Audio Affordable

The AK7735 inherits essential system functions from the well-established AK7738 while making specification upgrades to the DSP core, Audio I/O, ADC and SRC.
The AK7735 supports 28-bit floating point arithmetic and has a parallel operation capability of 3072 steps/fs x2, (at 48kHz sampling).  In addition, the RAM is freely programmable for user applications, making it possible for various audio processing functions such as surround sound, parametric equalization, and various sound effects.  The integrated large memory eliminates the need for external program memory.  Programs are loaded into the RAM via a serial interface from a microcontroller, allowing for seamless updates.

● VELVET SOUND Technology

Advanced 32-bit DAC’s with, “VELVET SOUND”, technology for high-end audio products are adopted for analog outputs, succeeding with high-quality playback of high-resolution sound sources.

●  Building a Flexible Audio System

The AK7735 has two stereo ADC’s, two stereo DAC’s and two asynchronous stereo SRC’s, making it possible to compose the main block of an audio system without requiring additional audio components.  The internal path connection of the AK7735 can be set freely via register setting.
An integrated microphone amplifier and microphone bias circuit reduce the mounting area of the printed board.  The AK7735 can also provide signals to a class-D amplifier and receive input data from external digital audio sources.  (Serial Audio Interface: 8ch input, 8ch output*.  It operates with MSB-first, LSB-first, I²S, and PCM audio data formats).
*  In TDM mode: 32ch input, 32ch output

Main Specifications

Product Name AK7735
AK7735
AK7738
AK7738
AK7707
AK7707
DSPAKM Core
HiFi2 Core
2
-
3
-
2
1
MIPS4425531,105
ADCwith MIC Amp 2ch (24-bit)
with Input Selector
2ch (24-bit)
with MIC Amp 2ch (24-bit)
with Input Selector
3ch (24-bit)
-
Sound Color can be selected by Four Types of Digital Filters-
DAC4ch (32-bit)4ch (32-bit)-
VELVET SOUND Technology
Sound Color can be selected by Four Types of Digital Filters
-
SRC4ch8ch12ch
Audio I/ODigital Input4ports
(TDM I/F  Max 32ch)
6ports
(TDM I/F  Max 24ch)
8ports
(TDM I/F  Max 64ch)
Digital Output4ports
(TDM I/F  Max 32ch)
6ports
(TDM I/F  Max 28ch)
8ports
(TDM I/F  Max 64ch)
DIT-AvailableAvailable
DIR--Available
PLLfor Audio Clock Generation
uP I/FI2C (400kHz/1MHz), SPI (Max : 6MHz)
Power SupplyAnalog/Digital3.0 to 3.6V
I/F3.0 to 3.6V
Operation TemperatureAK7735AVQ : -40 to 85°C
AK7735EQ : -20 to 85°C
-40 to 85°C-40 to 85°C
Package48-pin LQFP64-pin LQFP64-pin HTQFP
[Notes]
* Information on this page is current on the date of press release.
* AKM and VELVET SOUND™ are trademarks of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States.
* Appellations, company names and product names on this page are trademarks or registered trademarks of respective companies.

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