AK4458VN

ADCs/DACs - Special Purpose Overview

The AK4458VN is a 32-bit, 8-channel premium DAC from Asahi Kasei Microdevices. It supports PCM inputs up to 768kHz and DSD inputs up to 11.2MHz (DSD512). Key electrical specifications include a dynamic range and signal-to-noise ratio of 115dB, with a THD+N of -107dB at AVDD=5.0V. The device features five selectable digital filters, including sharp and slow roll-off options. Power supplies are AVDD (3.0V–5.5V) and TVDD (1.7V–3.6V). It operates within a temperature range of -40°C to +105°C when the exposed pad is grounded, housed in a 48-pin QFN package.

ADCs/DACs - Special Purpose Feature Summary

• Supports 768kHz PCM and 11.2MHz DSD input formats
• 115dB Dynamic Range/SNR and -107dB THD+N performance
• Five types of 32-bit digital filters with selectable group delay
• OSR-Doubler technology for low out-of-band noise and power consumption

ADCs/DACs - Special Purpose Applications

• AV Receivers
• CD/SACD Players
• Network Audio Systems
• USB DACs and USB Headphones
• Car Audio Systems and External Amplifiers

ADCs/DACs - Special Purpose Procurement Notes

Verify that the exposed pad on the 48-QFN package is connected to ground to ensure operation up to 105°C; leaving it open limits the operating temperature to 85°C. Confirm AVDD and TVDD supply voltages match the recommended operating conditions for the desired performance level. Check register settings for I2C or parallel control mode selection via the PS pin.

ADCs/DACs - Special Purpose Selection Notes

Select this component for high-resolution audio applications requiring multi-channel output or daisy-chain configurations. Ensure the host system provides master clocks compatible with the specified OSR ratios (e.g., 64fs to 1152fs). Consider the internal LDO enable pin (LDOE) if powering the digital core internally versus externally.

ADCs/DACs - Special Purpose Part Context

The AK4458VN belongs to the AK4458 series of premium DACs. It utilizes AKM's Velvet Sound architecture and OSR-Doubler technology. The 'VN' suffix indicates the 48-pin QFN package variant designed for surface mount assembly with an exposed thermal pad.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.