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AKM develops a high quality sound D/A converter dedicated to true wireless earphones



Asahi Kasei Microdevices Corporation, (AKM), has developed a 32-bit mono portable audio DAC with a built-in headphone amplifier optimized for true wireless earphones, (TWS: True Wireless Stereo).

The AK4332ECB supports both high quality sound and ultra-low power consumption, integrated into an ultra-small 30-pin CSP package. Mass production of the AK4332ECB is scheduled for the summer of 2019.


High Performance of -101dB THD+N with only 2.8mW Power Consumption

VELVET SOUND technology is optimized in pursuing high quality sound and high performance for TWS. The AK4332ECB achieves high performance of -101dB THD+N and 109dB SNR with the industry's most advanced level of ultra-low power consumption at 2.8 mW. This will enable TWS playback for long times with high quality sound.

Capable of Achieving Even Lower Power Consumption with support of a 1-bit PDM signal

Further low power consumption is achieved by executing digital signal processing of the digital filtering and ΔΣ modulation with a Bluetooth SoC which utilizes small geometry transistors.

AK4332 System


True Wireless Earphones