아날로그 MEMS 마이크로폰 ICS-40180 모듈
(SparkFun Analog MEMS Microphone Breakout - ICS-40180)
개요
- 본 제품은 아날로그 MEMS 마이크로폰 ICS-40180 모듈 입니다.
- InvenSense ICS-40180 아날로그 마이크로폰 칩을 탑재하고 있는 제품으로 OpAmp를 탑재하여 마이크로폰의 출력을 사용가능한 레벨로 증폭하여 줍니다.
- 마이크로컨트롤러의 ADC에 바로 연결하여 사용이 가능합니다.
특징
- -3dB roll off at 60Hz and 19.7kHz
- 1.5VDC to 3.6VDC supply voltage
- Should comfortably output 40mW
- OPA344 provides 600Ω output impedance
- SNR of 65dBA
- In addition to amplifying the signal, the OpAmp adds a bias voltage of 1/2 VCC. With sound sources such as a normal speaking voice a few feet away from the microphone, the AUD output signal will be at about 200mV peak-to-peak. Also note, this low profile microphone has its port on the bottom side, so the microphone can be mounted flush to the outer surface of your enclosure. This microphone is omni-directional, which means it does a good job of picking up sound sources from all directions.