AK4377ECB

Overview

The AK4377ECB is a stereo advanced 32-bit audio DAC featuring a built-in ground-referenced Class-G headphone amplifier utilizing VELVET SOUND technology. It supports PCM data up to 768 kHz and DSD256 input via DoP. The device offers four digital filter types, master/slave operation modes, and an I2C control interface. Key electrical specifications include a signal-to-noise ratio of 128 dB and THD+N of -109 dB at 10 mW output into 32Ω. Power supplies AVDD, CVDD, and LVDD operate between 1.7 V and 1.9 V, while TVDD ranges from 1.65 V to 3.6 V. It is housed in a 36-pin CSP package measuring 2.89 x 3.08 mm.

Feature Summary

• Stereo High Sound Quality Advanced 32-bit DAC with 4-types of Digital Filter for sound color selection
• Ground-referenced Class-G Stereo Headphone Amplifier delivering 60 mW @ 16Ω with IEC61000-4-2 Level 4 ESD protection
• Supports Master/Slave Mode with sampling frequencies up to 768 kHz (Slave) or 384 kHz (Master)
• Integrated PLL, X’tal Oscillator, and μP Interface via I2C-bus (400 kHz)

Applications

• High-fidelity audio systems requiring low distortion and wide dynamic range
• Portable audio devices utilizing the compact 36-pin CSP package
• Digital audio interfaces supporting PCM and DSD formats

Procurement Notes

Verify the specific ordering suffix and package dimensions against the manufacturer's current documentation before procurement. Confirm that the 36-pin CSP (2.89x3.08 mm) footprint matches the design layout. Ensure power supply requirements for AVDD, CVDD, and LVDD (1.7–1.9 V) are met within the specified operating temperature range of -40°C to 85°C.

Selection Notes

Select this component for applications requiring a combined DAC and headphone amplifier solution in a minimal board space. Consider the 4 digital filter options for specific sound quality preferences. Verify compatibility with the required audio interface format (I2S/MSB justified) and sampling rates. Check if the integrated charge pump and LDO features simplify the external power design compared to discrete solutions.

Part Context

The AK4377ECB belongs to Asahi Kasei Microdevices' line of high-performance audio DACs. It is part of the AK4377 series, designed to offer advanced sound quality through VELVET SOUND technology. The device integrates multiple functions including a headphone amplifier, PLL, and digital filters into a single small package, targeting premium audio applications.

Replacement Considerations

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