AK4490REQ

ADCs/DACs - Special Purpose Overview

The AK4490REQ is a stereo premium 32-bit digital-to-analog converter (DAC) from Asahi Kasei Microdevices, utilizing VELVETSOUND technology. It supports PCM inputs up to 768 kHz and DSD256 formats. Key electrical specifications include a signal-to-noise ratio of 120 dB in stereo mode and -112 dB THD+N. The device operates on supply voltages ranging from 1.2 V to 3.3 V and functions within an ambient temperature range of -40°C to +105°C. It features six integrated digital filters and is housed in a 48-pin LQFP package.

ADCs/DACs - Special Purpose Feature Summary

• Supports high-resolution audio with 768 kHz PCM and DSD256 input capabilities
• Delivers 120 dB SNR and -112 dB THD+N performance using multi-bit delta-sigma architecture
• Integrates six selectable digital filters for flexible sound design
• Employs VPWM output technology requiring only simple RC low-pass filtering

ADCs/DACs - Special Purpose Applications

• High-end audio systems
• Professional audio equipment
• AV receivers and CD/SACD players
• Network audio devices and USB DACs
• Sound bars and PA equipment

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'REQ' against the manufacturer's official datasheet to confirm pinout compatibility and functional parameters. Ensure that the selected packaging format aligns with assembly requirements, as variations may exist between reel and cut tape options. Confirm moisture sensitivity level handling procedures prior to soldering.

ADCs/DACs - Special Purpose Selection Notes

Select this component for designs requiring high-fidelity stereo conversion with minimal external analog filtering due to VPWM output. Verify that the host processor supports the required I2S/PCM interface protocols and clock speeds up to 768 kHz. Ensure power supply rails meet the specified voltage ranges for both analog and digital sections to maintain optimal noise performance.

ADCs/DACs - Special Purpose Part Context

The AK4490REQ belongs to the Premium DAC Gen3 series by Asahi Kasei Microdevices. This family focuses on high-resolution audio processing with advanced digital filtering and low-distortion architectures. The device is designed to replace older generation converters while offering improved dynamic range and flexibility through programmable digital filters.

ADCs/DACs - Special Purpose Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.