AKM AK4953A 24位立体声CODEC解决方案

AKM 公司的AK4953A是集成了MIC/HP/SPK-AMP的24位立体声CODEC,输入电路包括麦克风放大器和自动音量控制(ALC)电路,输出电路包括无电容的耳机放大器和扬声器放大器,集成的电荷泵电路产生负电压,因此输出不需要AC耦合电容,工作电压0.9V-5.5V,主要用在具有录音和播放功能的手提设备.本文介绍了AK4953A主要特性,方框图, 立体声和单声道的数字MIC连接案例, 3线串接模式的系统连接框图以及AKD4953-A评估板主要特性,方框图和电路图.

AK4953: 24bit Stereo CODEC with MIC/HP/SPK-AMP

The AK4953 is a low power consumption 24bit stereo CODEC with a microphone, headphone and speaker amplifiers. The input circuits include a microphone amplifier and an ALC (Automatic Level Control) circuit, and the output circuits include a cap-less headphone amplifier and a speaker amplifier. It is suitable for portable application with recording/playback function. The integrated charge pump circuit generates a negative voltage and removes the output AC coupling capacitors. The speaker amplifier has a wide operating voltage range, which is from 0.9V to 5.5V, enabling a direct drive to batteries. The AK4953 is available in a small 36pin QFN (5x5mm 0.4mm pitch), utilizing less board space than competitive offerings.

AK4953A主要特性:

1. Recording Function

• Stereo Single-ended input with three Selectors
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