[原创] AKM AK4637低功耗24位音频CODEC解决方案

AKM公司的AK4637是集成了麦克风和扬声器放大器的低功耗24位单声道音频编解码器(CODEC),取样频率从表面上8kHz到48kHz,输入电路包括麦克风放大器和高性能数字自动电平控制电路(ALC),输出电路包括功率1W的扬声器放大器,主要用在音频窄带,宽带和超宽带声音信号处理.本文介绍了AK4637主要特性,功能框图以及评估板AKD4637-B功能,框图,电路图,PCB元件布局图和设计图.

The AK4637 is a low power 24-bit Mono CODEC with a microphone and speaker amplifiers. The AK4637 supports sampling frequency from 8kHz to 48kHz. It is suitable for a wide range of application from speech signal processing for narrowband, wideband and super wideband to sound signal processing for audio band.

The input circuits include a microphone amplifier and a high performance digital ALC (automatic level control) circuit. In addition, the output circuits include a speaker amplifier with 1W output power. It is suitable for various products as well as portable applications with recording/playback function.

The AK4637 are available in a small 20-pin QFN (3mm x 3mm, 0.4mm pitch: AK4637EN) package saving mounting area on the board.

AK4637主要特性:

1. Recording Functions
 Analog Input
 Monaural Single-ended input or Differential input
 Microphone Amplifier: +30dB ~ 0dB, 3dB Step ..

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