The MP23DB02MM from STMicroelectronics is an ultra-compact, low-power, omnidirectional, digital MEMS microphone built with a capacitive sensing element and an IC interface with optional stereo configuration.
The sensing element of the MP23DB02MM is capable of detecting acoustic waves and is manufactured using a specialized silicon micromachining process dedicated to produce audio sensors. The onboard IC interface is manufactured using a CMOS process that allowed STMicroelectronics to design a dedicated circuit that is able to provide a digital signal externally in PDM format.
The device has sensitivity of –26 dBFS typical with a narrow sensitivity range of ±1 dB, high SNR and low distortion for all operation modes. Acoustic overload point is specified at 122 dBSPL and the devices have good frequency response.
Normalized frequency response
The MP23DB02MM MEMS microphone offers multiple performance modes, power down, low power and normal mode, these are enabled by using different clock frequency ranges. Supply voltage range is 1.6 V to 3.6 V, current consumption in low-power mode is 285 µA and 800 µA in normal mode.
The MP23DB02MM is supplied in a bottom-port, SMD-compliant, EMI-shielded package and has an extended operating temperature range of -40 °C to +85 °C.
The MP23DB02MM ultra-compact, low-power, omnidirectional, digital MEMS microphones are suitable for a wide range of applications including communications devices, portable computing equipment, instrumentation, wearable and hearable devices, imaging equipment and security systems.
Evaluation Board
The MP23DB02MM is supported by the STEVAL-MIC005V1 daughterboard which contains four MP23DB02MM digital MEMS microphones and is designed to be used with the X-NUCLEO-CCA02M2 expansion board. Once the daughter board is connected with the X-NUCLEO-CCA02M2 expansion board, synchronized acquisition and streaming of up to 4 microphones through I²S, SPI, DFSDM or SAI peripherals is possible. The expansion board is compatible with the STMicroelectronics morpho connector layout and can accommodate a range of digital microphone daughter boards available from STMicroelectronics. The daughterboard and expansion board combination provides designers with a quick and easy solution for the development of microphone-based applications as well as a starting point for audio algorithm implementation.
Anglia are offering customers a FREE evaluation board and samples of the MP23DB02MM ultra-compact, low-power, omnidirectional, digital MEMS microphone from STMicroelectronics, please fill in the form below to register for evaluation kit and samples now.
FREE samples for UK and Ireland customers only, subject to availability.
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