AK4377AECB

Overview

The AK4377AECB is a stereo advanced 32-bit audio DAC with an integrated ground-referenced Class-G headphone amplifier. It supports sampling frequencies up to 384 kHz and features four selectable digital filters for sound color customization. The device operates on AVDD, CVDD, and LVDD supplies ranging from 1.7 V to 1.9 V, with TVDD supporting 1.65 V to 3.6 V. Key electrical specifications include a typical SNR of 125 dB, THD+N of -107 dB at 10 mW into 32 Ω, and output power of 25 mW (RL=32 Ω) or 60 mW (RL=16 Ω). It utilizes a 36-pin CSP package measuring 2.56 x 2.74 mm.

Feature Summary

• Stereo 32-bit DAC with built-in Class-G headphone amp delivering 25 mW @ 32 Ω and 60 mW @ 16 Ω
• Supports sampling rates up to 384 kHz with four digital filter options for sound selection
• I2C control interface (400 kHz) and Master/Slave serial audio interface compatibility
• ESD protection compliant with IEC61000-4-2 Level 4 (±8 kV contact discharge)

Applications

• Portable audio players and smartphones
• Digital audio equipment requiring low-power high-fidelity conversion
• Embedded audio systems in consumer electronics

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and tape/reel specifications. Ensure that the supply voltage requirements (AVDD/CVDD/LVDD 1.7–1.9 V, TVDD 1.65–3.6 V) match the target system design before procurement.

Selection Notes

Select this component for applications requiring a compact solution integrating both high-performance DAC and headphone amplification. Consider the available digital filter types if specific phase response or roll-off characteristics are required. Verify that the 36-pin CSP footprint fits within the PCB layout constraints.

Part Context

The AK4377AECB belongs to Asahi Kasei Microdevices' line of low-power advanced audio DACs. It is designed to replace discrete DAC and amplifier solutions by integrating both functions into a single small-form-factor package, reducing board space and external component count for portable audio devices.

Replacement Considerations

Consult the manufacturer's official replacement guide for verified substitute part numbers. Do not assume pin-to-pin compatibility with other models without verifying electrical parameters and pin configurations.