Publish Date : 2021-11-01
Last Modified : 2024-03-25


PDM MEMS Microphone Unit (SPM1423)


PDM mini Unit is a digital MEMS silicon-based microphone that utilizes Pulse-Density Modulation (PDM) signaling. This microphone is known for its high signal-to-noise ratio, high sensitivity, low power consumption, resistance to RF interference, and smooth frequency response. It automatically switches microphone states (power-off/active/sleep) based on the clock frequency, making it suitable for a wide range of applications in wearable devices and smart digital devices for audio data capture.One of the key advantages of the PDM mini Unit is its digital output format. Instead of providing analog signals, it utilizes the PDM technique, which converts the audio signal into a digital bitstream based on the density of pulses. This digital output makes it convenient for integration with digital signal processors (DSPs) or microcontrollers, as it eliminates the need for additional analog-to-digital conversion.PDM mini Unit offers high performance in terms of capturing audio with excellent fidelity. Its high signal-to-noise ratio ensures clear and accurate audio recordings, while its high sensitivity allows for capturing even subtle sounds. The low power consumption makes it suitable for battery-powered devices, extending their operational life. Additionally, its resistance to RF interference ensures reliable audio capture in the presence of electromagnetic signals.This microphone is well-suited for applications where compact size, low power consumption, and high-quality audio capture are essential. It finds use in various devices such as wearable technology, smartwatches, smartphones, tablets, voice-controlled devices, and other smart digital devices that require audio data collection and analysis.