ST MP34DT01和STM32数字MEMS麦克风解决方案

ST 公司的MP34DT01是超小型低功耗全方位数字MEMS麦克风,具有容性传感元件和IC接口,单电源工作,声学过载点120 dBSPL,信噪比63dB,全方位灵敏度,灵敏度－26dBFC,PDM输出,主要用在手机,笔记本电脑,手持媒体播放器(PMP),VoIP,语音识别,数码相机和摄像机,防盗系统等.本文介绍了MP34DT01主要特性,以及采用MP34DT01和STM32 MCU的STEVAL-MKI117V1演示板主要特性,电路图,材料清单和PCB布局图.

The MP34DT01 is an ultra-compact, low-power,omnidirectional, digital MEMS microphone built with a capacitive sensing element and an IC interface.

The sensing element, capable of detecting acoustic waves, is manufactured using a specialized silicon micromachining process dedicated to produce audio sensors.

The IC interface is manufactured using a CMOS process that allows designing a dedicated circuit able to provide a digital signal externally in PDM format.

The MP34DT01 has an acoustic overload point of 120 dBSPL with a 63 dB signal-to-noise ratio and –26 dBFS sensitivity.

The MP34DT01 is available in a top-port, SMDcompliant, EMI-shielded package and is guaranteed to operate over an extended temperature range from -30℃ to +70℃.

MP34DT01主要特性:

■ Single supply voltage

■ Low power consumption

■ 120 dBSPL acoustic overload point

■ 63 dB signal-to-noise ratio
..

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