120dB 768kHz/32-bit 2ch Premium DAC

  • Inquiry
  • Digi-Key
  • Evaluation Board Manual
  • Data Sheet


Premium DACs AK4490EQ
The AK4490EQ is a new generation of premium 32-bit DAC, with 2-channels of AKM’s VELVET SOUND architecture that has been widely adopted by well-established high-end audio companies. This technology realizes fine sound details with its low-distortion architecture in addition to 32-bit resolution digital filter processing. The digital input supports up to 768 kHz PCM and 11.2 MHz DSD (Direct Stream Digital), suitable for high-resolution audio source playback. Five digital filters are integrated into the DAC realizing simple and flexible sound making it ideal for in wide range of applications. The AK4490EQ is suitable for high-resolution sound source playback such as for network audio, USB DACs and car audio systems.




● Dynamic sound play back with large amount of playback information:

- AKMs VELVET SOUND architecture is utilized.
- Low-distortion technology achieves industry’s best performance of -112dB as a DAC with 120dB S/N characteristic.
- OSRD (Over Sampling Ratio Doubler) technology greatly reduces out of band noise.
- 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.

● Supporting High Resolution Data

- The digital input supports up to 768 kHz PCM and 11.2 MHz DSD (Direct Stream Digital), 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.

● Application

AV Receivers, CD/SACD Players, Network Audio, USB DACs, USB Headphones, Sound Plate/Bars, Car Audio, External Amplifiers for Car Audio, Measurement Equipment, Control Systems, Public Audio (PA), Smart Cellular Phones, IC-Recorders, Bluetooth Headphones and HD Audio/Voice Conference Systems

Key Features

● 256x Over sampling
● Sampling Rate:30kHz ~ 768kHz
● Sound Color: 32Bit 8x Digital Filter
- Ripple: ±0.005dB, Attenuation: 100dB
- Short Delay Sharp Roll-off, GD=6.25/fs
- Short Delay Slow Roll-off, GD=5.3/fs
- Sharp Roll-off
- Slow Roll-off
- Super Slow Roll-off
● High Tolerance to Clock Jitter
● Low Distortion Differential Output
● DSD Input Support 2.8MHz, 5.6MHz, 11.2MHz
- Filter (fc=50kHz, fc=150kHz, 2.8MHz mode)
- Filter Bypass Mode
● Digital De-emphasis for 32, 44.1, 48kHz sampling
● Soft Mute
● Digital Attenuator (255 levels and 0.5dB step)
● Mono Mode
● External Digital Filter Mode
● THD+N:-112dB
● DR, S/N:120dB (Mono mode, 123dB)
● I/F Format:24/32bit MSB justified, 16/20/24/32bit LSB justified, I2S, DSD
● Master Clock: 30kHz ~ 32kHz: 1152fs
30kHz ~ 54kHz: 512fs or 768fs
30kHz ~ 108kHz: 256fs or 384fs
108kHz ~ 216kHz: 128fs or 192fs
~ 384kHz: 64fs or 128fs
~ 768kHz: 64fs
● Power Supply:DVDD=AVDD=3.0 ~ 3.6V, VDD1/2=4.75 ~ 5.25V
● Digital Input Level:CMOS
● Package:48-pin LQFP

>> Read more

Block Diagram

Block Diagram

Page Top