AK4482VT

ADCs/DACs - Special Purpose Overview

The AK4482VT is a 24-bit stereo digital-to-analog converter (DAC) utilizing AKM’s multi-bit delta-sigma architecture. It supports sampling rates from 8kHz to 216kHz with integrated switched-capacitor filters (SCF) for fully differential outputs, eliminating the need for external AC coupling capacitors. Key electrical specifications include a dynamic range of 111dB and THD+N of -100dB at 1Vrms. The device operates on a single 5V supply (4.75V–5.25V) and features four selectable digital filters, including sharp and slow roll-off options with short delay variants. It interfaces via I2S, MSB/LSB justified formats, and includes digital volume control, soft mute, and zero-detect functions.

ADCs/DACs - Special Purpose Feature Summary

• 24-bit resolution with 111dB dynamic range and -100dB THD+N
• Fully differential SCF outputs remove requirement for AC coupling capacitors
• Supports sampling rates up to 216kHz (Quad Speed Mode)
• Four digital filter modes: Sharp Roll-off, Slow Roll-off, Short Delay Sharp, Short Delay Slow
• Integrated digital volume control (256 steps), soft mute, and de-emphasis filter

ADCs/DACs - Special Purpose Applications

• Blu-ray Disc (BD) amplifier systems
• AC-3 amplifier systems
• Digital audio equipment requiring cost-effective high-quality DAC solutions

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'VT' corresponds to the 16-pin TSSOP package variant when sourcing. Confirm that the application design accommodates the 5V analog supply voltage requirement, as this component does not support lower voltage operation. Ensure all digital input pins are properly terminated to prevent floating states during power-up or reset sequences.

ADCs/DACs - Special Purpose Selection Notes

Select the AK4482VT for designs requiring fully differential outputs without external coupling capacitors. Choose this part if the system requires sampling rates up to 216kHz and benefits from low group delay digital filters. Verify compatibility with the 5V power supply rail, as it differs from standard 3.3V logic-level DACs. Consider the 16-pin TSSOP footprint constraints against available PCB space.

ADCs/DACs - Special Purpose Part Context

The AK4482 is part of Asahi Kasei Microdevices' cost-effective 24-bit DAC portfolio. It is designed to replace higher-cost solutions in consumer audio applications by integrating switched-capacitor filtering directly into the DAC core. The device complements other AKM audio components by providing a compact, single-chip solution for stereo digital-to-analog conversion in space-constrained environments.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Designers should evaluate pin-compatible alternatives only if they match the 24-bit resolution, 5V supply requirement, and 16-TSSOP package dimensions.