PDM mini Unit is a digital MEMS silicon-based microphone based on PDM (Pulse Density Modulation) signal. The microphone has high signal-to-noise ratio, high sensitivity, low power consumption, anti-radio frequency interference, smooth frequency response and other characteristics. It automatically switches the microphone state according to the clock frequency (power down/activate/sleep)and can be widely used for audio data collection on wearable devices and smart digital devices.
|Sensitivity||94dB SPL@1KHz Nom.:-22dBFS|
|Signal to Noise Ratio||94dB SPL@1KHz,A-weighted Nom.:61.4dB|
|Total Harmonic Distortion||100dB SPL@1KHz Nom.:1%|
|Working voltage range||1.6 V to 3.6 V|
EasyLoader is a concise and fast program writer, which has a built-in case program related to the product. It can be burned to the main control by simple steps to perform a series of function verification.
PDM unit is connected to port a (this program does not support M5GO Base), and the sound spectrum is displayed on the screen
Please click here to download Arduino Code.