[原创]AKM AK4679集成音频DSP的24位立体声CODEC解决方案

AKM公司的AK4679是一款内置麦克风放大器、接收放大器、D类扬声器放大器、耳机放大器、线性放大器的24位立体声编解码音频DSP芯片。本文详细介绍了AK4679的主要特性、框图、应用框图以及采用AK4679芯片设计的评估开发板，通过评估板详细介绍了AK4679芯片各种模式下的应用设置及测试，评估板主要有评估板框图、电路原理图。

The AK4679 is a 24bit stereo CODEC and a built-in Microphone-Amplifier,Receiver-Amplifier, Mono Class-D Speaker-Amplifier, Cap-less Class-G Headphone-Amplifier and Line-Amplifier as well as HF/Audio DSP. The AK4679 features AKM DSP core to deal with hands free function for wide band and dual PCM I/F in addition to audio I/F that allows easy interfacing in mobile phone designs with Bluetooth I/F. The playback features also include 5-band Parametric EQ and Dynamic Range Control; therefore the AK4679 can automatically adjust the volume to a comfortable level that has no distortion and provides great flexibility. The AK4679 is available in a 78pin BGA, tilizing less board space than competitive offerings.

AK4679主要特性
􀂋 CODEC&Amp block
1. Recording Function (Stereo CODEC)
• 4 Stereo Input Selectors
• 4 Stereo Inputs (Single-ended) or 3 Mono Input (Full-differential)
• MIC Amplifier: +24dB ~ −6dB, 3dB step
• 2 Output MIC Power Supplies..

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