Asahi Kasei Microdevices AK4498EXVQ 129dB Multi-Bit Stereo Premium DAC

Asahi Kasei Microdevices AK4498EXVQ 129dB Multi-Bit Stereo Premium Digital-to-Analog Converter (DAC) is a high-performance stereo DAC designed to deliver exceptional audio fidelity through advanced VELVETSOUND™ architecture. The Asahi Kasei Microdevices AK4498EXVQ DAC features a fully partitioned digital and analog design that significantly reduces digital noise interference and enhances analog signal purity. With a signal-to-noise ratio (SNR) of up to 129dB (up to 133dB in mono mode) and total harmonic distortion as low as -117dB, the AK4498EXVQ ensures ultra-clean audio reproduction.

This DAC supports ultra-high-resolution formats, including 64-bit/1536kHz PCM and DSD1024, especially when paired with the AK4191EQ digital filter and ΔΣ modulator. The device also incorporates Data Weighted Averaging (DWA) routing technology to minimize conversion element variation, further improving sound quality. Applications include network audio, USB DACs, CD/SACD players, and professional audio equipment.

Features

Advanced VELVETSOUND architecture
Data Weighted Averaging (DWA) routing technology
Immersive listening experience
Enhanced analog performance
Seamless high-resolution audio playback
THD+N: -117dB (2V_RMS), -113dB (2.6V_RMS)
DR, S/N: 129dB (2V_RMS), 131dB (2.6V_RMS)
Multi-bit modulator data interface with 11.2896MHz clock, 6-bit modulator data

Mono mode
CMOS digital input level
Pin control
Power supply
- TVDD = AVDD = 1.7V to 3.6V
- DVDD = 1.7V to 1.98V
- VDDL/R= 4.75V to 5.25V
64-pin HTQFP package, 0.5mm pitch
-40°C to +105°C operting temperature range

Applications

AV receivers
CD/SACD players
Network audio systems
USB DACs
Wireless speaker systems
Digital audio players
Electronic musical instruments

USB headphones
Soundbars
Audio interfaces
Digital mixers
Measurement equipment
Control systems
Public Address (PA)

Specifications

±10mA maximum input current (any pin except supplies)
Operating power supply
- 3.6V maximum for the digital I/O and clock interface
- 1.7V to 1.98V range for the digital core
- 4.75V to 5.25V range for analog
Analog
- Dynamic
  - -117dB to -60dB THD+N range from 20kHz to 80kHz
  - 129dB typical dynamic range
  - 129dB to 131dB typical S/N range (A-weighted)
  - 120dB typical interchannel isolation at 1kHz
- DC accuracy
  - ±2.8Vpp to ±3.75Vpp typical output voltage range
  - 0.3dB interchannel gain mismatch, 0.1dB typicl
  - 20ppm/°C typical gain drift
  - 25pF maximum load capacitance

±10µA maximum input leakage DC current
Switching
- MCLK timing
  - 5MHz to 13.824MHz frequency range
  - 45% to 55% duty cycle range
  - 32ns minimum pulse width
- BCK timing
  - 5MHz to 13.824MHz frequency range
  - 45% to 55% duty cycle range
  - 32ns minimum pulse width
- Multi-bit audio interface timing
  - 5ns minimum mono mode hold/setup time
  - ±5ns stereo mode time
- Power down and reset timing
  - 600ns minimum PDN accept pulse width
  - 30ns maximum PDN reject pulse width