STMicroelectronics – Analogue MEMS microphone features high signal-to-noise ratio


The new MP23ABS1 from STMicroelectronics is a low-power microphone which combines a MEMS capacitive sound-sensing element and a sensor interface IC in a compact 3.5mm x 2.7mm x 1mm metal-cap package.

The MP23ABS1, a single-ended analogue bottom-port microphone, offers excellent audio characteristics, including a typical 64dB signal-to-noise ratio. Its acoustic overload point is 130dB. Sensitivity to sound is rated at -38dBV ±1dB at a sound pressure level of 94dB and a frequency of 1kHz.

Because of its omnidirectional sensitivity and high signal-to-noise ratio, the MP23ABS1 is suitable for use in a new generation of smart speakers, which may be used to recognise voice commands and spoken queries in noisy home environments.

The MP23ABS1 operates over an extended temperature range of -40°C to 85°C.


  • Single supply-voltage range: 1.52V to 3.6V
  • Omnidirectional sensitivity
  • Enhanced RF immunity
  • Ultra-flat frequency response
  • Low latency


  • Wearable devices
  • Smart speakers
  • Active noise-cancelling headsets