Adafruit Silicon MEMS Microphone Breakout – SPW2430 (EU Version)

Description
The SPW2430 is a small, low cost MEMS mic with a range of 100Hz ? 10KHz, good for just about all general audio recording/detection. This breakout is best used for projects such as voice changers, audio recording/sampling, and audio-reactive projects that use FFT. To keep the breakout small and simple, we only added a 3V voltage regulator (the microphone requires 3.3V DC) and filter capacitors. No additional op-amp is included, the output peak-to-peak voltage has a 0.67V DC bias and about 100mVpp (peak-to-peak) when talking near the microphone, which is good for attaching to something that expects ?line level? input without clipping. The peak-to-peak can be as high as 1Vpp if there?s a very loud sound.
How to use?
Using it is simple: connect GND to ground, Vin to 3.3-5VDC. For the best performance, use the ?quietest? supply available (on an Arduino, this would be the 3.3V supply). The audio waveform will come out of the?DC?pin. The output will have a DC bias of 0.67V so when its perfectly quiet that?s what you?ll read, there?s a little drift. If the audio equipment you?re using requires AC coupled audio, you can grab the signal out of the?AC?pin, which has a 10uF capacitor in series.
The output pin is not designed to drive speakers or anything but the smallest in ear headphones ? you?ll need an audio amplifier (such as our 3.7W stereo amp) if you want to connect the amp directly to speakers. If you?re connecting to a microcontroller pin, you don?t need an amplifier or decoupling capacitor ? connect the DC pin directly to the microcontroller ADC pin.
Package Includes

1 x Adafruit Silicon MEMS Microphone Breakout ? SPW2430
1 x Male Header