STMicroelectronics – High-performance MEMS microphone features fully differential output


STMicroelectronics’ MP23AB01DH is a compact, low-power MEMS microphone which offers excellent acoustic performance, including low noise and high sensitivity.

It consists of a capacitive sensing element and an IC interface. The sensing element, capable of detecting acoustic waves, is manufactured using a special silicon micromachining process dedicated to the production of audio sensors.

This advanced production technology helps the MP23AB01DH to achieve outstanding acoustic performance. Sensitivity is 38dB with an acoustic overload point of 135dB and a minimum 65dB signal-to-noise ratio.

The MP23AB01DH also has a fully differential output which has the effect of minimising common-mode noise.

The MP23AB01DH is guaranteed to operate over an extended temperature range from -40°C to 85°C.

It is housed in an LGA package with a metal cap, and the acoustic opening in the bottom. The package measures 3.4mm x 2.5mm x 1.0mm.


  • Single 2.7V supply voltage
  • Omnidirectional sensitivity
  • -100dB power-supply rejection
  • High bandwidth
  • High RF immunity


  • Consumer devices
  • Industrial applications

The STEVAL-MKI139V4 board contains four MP23AB01DH analogue MEMS microphones. The coupon design allows easy evaluation of the microphones. Single PCBs hosting each microphone may be easily detached.

Orderable Part Number: STEVAL-MKI139V4