STMicroelectronics – MEMS microphone offers high signal-to-noise ratio and impressive sensitivity


The MP23AB01DH from STMicroelectronics is a low-power microphone which combines a MEMS capacitive sound-sensing element and a sensor interface IC in a compact 3.4mm x 2.5mm x 1mm metal-cap LGA package.

The MP23AB01DH, a single-ended analogue bottom-port microphone, offers excellent audio characteristics, including a typical 65dB signal-to-noise ratio. Its acoustic overload point is 135dB. Sensitivity to sound is rated at -38dBV ±1dBV at a frequency of 1kHz. The MP23AB01DH provides a fully differential output to minimise common-mode noise.

Like other microphones which are based on MEMS technology, the MP23AB01DH is less susceptible to mechanical vibrations, temperature variations and electromagnetic interference than traditional electret microphones.

The MP23AB01DH operates over an extended temperature range of -40°C to 85°C.


  • Single supply-voltage range: 2.3V to 3.6V
  • Omnidirectional sensitivity
  • High bandwidth
  • High immunity to RF noise


  • Digital cameras and camcorders
  • Gaming equipment
  • Portable media players
  • Hands-free devices
  • Hearing aids
  • Headsets

The STEVAL-MKI139V5 is supplied as a daughterboard featuring four MP23AB01DH analogue MEMS microphones. It is possible to detach each microphone, which is mounted on its own coupon board.

Orderable Part Number: STEVAL-MKI139V5