MT402是一种单声道USB麦克风方案，内置sigma-delta ADC、麦克风前置增益放大器、 锁相环、音量增益调节器和USB收发器。它是非常适合USB电脑麦克风录音的应用。即插即用，无需安装驱动程序。-MT402 is a mono USB microphone solutions built sigma-delta ADC, microphone pre-amplifier gain, PLL, volume gain regulator and USB transceiver.