News
	Date Posted:	07/01/2009
	Title:	High Performance 32-bit Stereo DAC Optimized for Sound Quality ( 1263)
	Summary	Achieving very high dynamic performance, the AK4399 features -105dB THD+N and 123dB dynamic range in stereo mode
	Main Text	Asahi Kasei EMD Corporation has launched the AK4399, a high performance 32-bit stereo DAC that achieves 123dB dynamic range for stereo and 126dB for mono outputs. It is the newest member of the Audio4proTM family, and it is the highest performing device in the 32-bit DAC series. An innovative design technique utilizing a symmetrical layout for the left and right channels prevents signal quality deterioration, and a 32-bit digital operation block provides full 32-bit processing. Achieving very high dynamic performance, the AK4399 features -105dB THD+N and 123dB dynamic range in stereo mode. The device features fully differential outputs, digital attenuator, de-emphasis filter, soft mute circuit and zero detection. The sampling rate ranges from 30kHz to 216kHz, and the operating voltage is 5V. Two digital filters are integrated into the AK4399: a sharp roll-off filter for high fidelity audio and a short delay filter that has no impulse noise pre-ring for live performance applications. In addition, 32-bit digital audio data can be input directly to the delta-sigma modulator without passing into the integrated digital filters, allowing for use of an external digital filter.