Adafruit Silicon MEMS Microphone Breakout - SPW2430

The SPW2430 MEMS microphone breakout board offers seamless integration for capturing sound with no bias resistor or amplifier needed. It mirrors traditional electret microphones by converting sound to voltage, covering a dynamic range from 100Hz to 10KHz. Ideal for various audio projects such as voice changers, audio-sampling, and FFT-based audio-reactive projects.

Specifications include a built-in 3V voltage regulator and filter capacitors, but exclude an opamp for a streamlined design. The microphone outputs at 0.67V DC bias and about 100mV peak-to-peak when spoken into, rising to 1V peak-to-peak at higher volumes. It connects readily to devices expecting line-level input without causing distortion.

Usage is straightforward; connect Ground to GND, and 3.3-5VDC to Vin. Utilize the quietest power supply available for optimal performance. The audio output is accessible via the DC pin, with an option to obtain AC-coupled audio from the AC pin. External amplification is necessary for driving speakers, while direct connection to microcontroller ADC pins is supported without additional components.