AK4497EQ
Premium High-end D/A Converter
AK4497EQ
Premium High-end D/A Converter
128dB 768kHz/32-bit 2ch Premium High-end D/A Converter
The AK4497 is a new generation premium 32-bit DAC based on AKM’s VELVET SOUND architecture that has been widely adopted by well-established high-end audio companies. High signal to noise performance is achieved by improving VELVET SOUND technology by supporting a larger current drive capability. The performance of an audio DAC using switched capacitor is expanded to the limit with the AK4497.
In addition, AKM has developed an original process that has greatly improved low noise performance and electric margin for audio devices, increasing data amount and enhancing original acoustic sound that can be found in the sound strength.
Dynamic Sound Playback with Large Amount of Playback Information: VELVET SOUND architecture is improved
Not only circuit designing but also the LSI manufacturing process was newly developed at AKM exclusively for AKM’s audio devices. The AK4497 is the first device to utilize this process in AKMs foundry.
32-bit processing is integrated for the IRD (Impulse Response Designed) Filter, reproducing a detailed and natural signal wave. A low-dispersion short delay filter was newly added to the other five filters found in our previous generation device. So, six different digital filter types are selectable according to the user audio and system preferences.
AKM’s Best Performance D/A Converter
Low-distortion technology achieves industry’s best performance of -116dB THD+N DAC with 128dB S/N characteristic.
The AK4497 has the best performance among AKM’s D/A converters. In addition, OSRD (Over Sampling Ratio Doubler) technology greatly reduces out of band noise.
Supporting High Resolution Data
The first in the industry, a 22.4MHz DSD input is supported. The digital input supports up to 768 kHz PCM and 22.4 MHz DSD (Direct Stream Digital), recreating high-resolution sound that is as close as possible to the original acoustic source.
Application
High-end Audio, Professional Audio, AV Receivers, CD/SACD Players, Network Audio, USB DAC’s, USB Headphones, Sound Plates, Sound Bars, PA Equipment, Bluetooth Headphones, HD Audio, Voice Conference Equipment, IC Recorders, Measurement Instruments, Control Systems
Key Features
- Maximum Sampling Frequency, Bit rate : PCM 768kHz/32-bit, DSD 22.4MHz
- SNR : 128dB (Mono mode: 131dB)
- THD+N : -116dB
- Sound Color Digital Filter : 6 types
Block Diagram
Main Specifications
| Part Number | AK4499EQ | AK4497EQ | |
|---|---|---|---|
| Number of Channels | 4ch | 2ch | |
| Output architecture | Current | Voltage | |
| Resolution | 32-bit | 32-bit | |
| THD+N | -124dB | -116dB | |
| DR, S/N | 134dB 140dB (Mono Mode) |
128dB 131dB (Mono Mode) |
|
| Sampling Rate | 8 to 768kHz | 8 to 768kHz | |
| DSD Input | 22.4MHz | 22.4MHz | |
| VELVET SOUND Technology |
Low Distortion Technology | Yes | Yes |
| LSI Process for Audio | Yes | Yes | |
| Non-Magnetic Pkg | Yes | Yes | |
| “Sound Color” Digital Filters | 6 types | 6 types | |
| Power Consumption | 667mW | 346mW | |
| Power Supply | Analog : 4.75 to 5.25V Digital : 1.7 to 3.6V |
Analog : 4.75 to 5.25V Digital : 1.7 to 3.6V |
|
| Operation Temperature Range | -40 to +85°C | -40 to +85°C | |
| Package | 128-pin HTQFP | 64-pin TQFP | |
Related Contents
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(English)
About VELVET SOUND
VELVET SOUND is a sound philosophy and brand concept for AKM’s next-generation audio devices, featuring new chip architectures and core technologies.
The new circuitry found in VELVET SOUND devices is designed to maximize dynamics and ensure pure, unaltered audio data, prioritizing the accurate capture and reproduction of the source material in order to achieve high performance and rich musicality. These devices were designed specifically for the high-resolution digital audio era.
* VELVET SOUND ™, VELVET SOUND | VERITA ™ and Audio 4 Pro ™ are trademarks of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States.
velvetsound.akm.com
by ASAHI KASEI MICRODEVICES