AK4490EN

ADCs/DACs - Special Purpose Overview

The AK4490EN is a premium 32-bit stereo digital-to-analog converter (DAC) from Asahi Kasei Microdevices. It features a low distortion architecture with THD+N of -112dB and an S/N ratio of 120dB in stereo mode, or 123dB in mono mode. The device supports PCM data up to 768kHz and DSD data at 2.8MHz, 5.6MHz, and 11.2MHz. It integrates five types of 32-bit digital filters and utilizes a switched capacitor filter OSR Doubler for wide signal range support and low out-of-band noise. The DAC provides differential analog outputs and operates on multiple power supplies: AVDD/DVDD at 3.0-3.6V, VDDL/R at 4.75-5.25V, and TVDD at 1.6V-DVDD.

ADCs/DACs - Special Purpose Feature Summary

• 32-bit resolution with industry-leading low distortion (-112dB THD+N) and high dynamic range (120dB S/N).
• Supports high-resolution audio formats including 768kHz PCM and DSD inputs at 2.8MHz, 5.6MHz, and 11.2MHz.
• Integrates five selectable 32-bit digital filters (Sharp Roll-off, Slow Roll-off, Super Slow Roll-off, and Short Delay variants) for flexible sound tuning.
• Includes a newly developed switched capacitor filter 'OSR Doubler' to achieve low out-of-band noise and reduced power consumption.

ADCs/DACs - Special Purpose Applications

• AV Receivers
• CD/SACD Players
• Network Audio Systems
• USB DACs
• Measurement Equipment

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific package type and ordering suffix against the manufacturer's current datasheet before procurement. Ensure that the design accommodates the required multi-rail power supply sequencing (TVDD, AVDD/DVDD, VDDL/R) as specified in the recommended operating conditions to guarantee proper initialization and operation.

ADCs/DACs - Special Purpose Selection Notes

Select this component for applications requiring high-fidelity stereo audio conversion with minimal external filtering due to the integrated OSR Doubler. Consider the available digital filter options when designing for specific latency requirements, such as using Short Delay modes for real-time processing. Ensure the host system can provide the necessary master clock frequencies ranging from 16fs to 1152fs depending on the input sampling rate.

ADCs/DACs - Special Purpose Part Context

The AK4490EN belongs to Asahi Kasei Microdevices' premium DAC lineup, utilizing advanced VELVETSOUND technology. It is designed to replace older generation DACs in high-end audio equipment by offering superior dynamic range and lower distortion without requiring complex external oversampling circuits.

ADCs/DACs - Special Purpose Replacement Considerations

Check the manufacturer's ordering guide for pin-compatible or functionally similar successors within the AK449x series. Verify if newer revisions offer updated power management features or additional digital interface options that might simplify the system design compared to the AK4490EN.