Maxim 公司的MAX9888是采用FLEXSOUND技术的全特性立体声音频CODEC，具有高性能和低功耗特性，特别适合用于手提设备。D类放大器为两个扬声器提供高效而低辐射的放大（每路950mW），不需要滤波器。集成的旁路开关可在D类放大器不使用时可使放大器直接连接到传感器。MAX9888具有立体声DirectDrive耳机放大器和差分接收放大器，双路I2S/PCM/TDM 数字音频接口。本文介绍了MAX9888主要特性，简化方框图和功能方框图，以及麦克风输入，线输入，ADC输入混合器，录音通路信号处理，数字信号路由，数字带通滤波，扬声器放大器信号和处理处理等方框图以及采用模拟麦克风输入和旁路开关与数字麦克风输入和接收放大器的典型应用电路图。

100dB DR Stereo DAC (8kHz < fS < 96kHz)

91dB DR Stereo ADC (8kHz < fS < 96kHz)

Stereo Low EMI Class D Amplifiers 950mW/Channel (8I, VSPKVDD_ = 4.2V)

Stereo DirectDrive Headphone Amplifiers

Differential Receiver Amplifier

2 Stereo Single-Ended/Mono Differential Line Inputs

3 Differential Microphone Inputs

FLEXSOUND Technology

5-Band Parametric EQ

Automatic Level Control (ALC)

Excursion Limiter

Speaker Power Limiter

Speaker Distortion Limiter

Microphone Automatic Gain Control and Noise Gate

Dual I2S/PCM/TDM Digital Audio Interfaces

Asynchronous Digital Mixing

Supports Master Clock Frequencies from 10MHz to 60MHz

RF Immune Analog Inputs and Outputs

Extensive Click-and-Pop Reduction Circuitry

I2C Control Interface

63 WLP Package (3.80mm x 3.30mm, 0.4mm Pitch)

图1。MAX9888简化方框图

图2。MAX9888功能方框图

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