AN4598 Datasheet, PDF (1/12 Pages) STMicroelectronics – Pre-amplifying the analog output of a MEMS microphone

AN4598
Application note
Pre-amplifying the analog output of a MEMS microphone
Pierre Sennequier
Introduction
MEMS microphones are an innovative way of recording sound.
STMicroelectronics provides a good portfolio of MEMS microphones. Products include the
MPxAxx family (e.g. MP23AB02B).
Such products have an analog output. Generally, this output signal is quite low and needs to
be amplified to reach the desired level required for the next stage (from microphone level to
line level).
This application note describes how to perform this “pre-amplification”.
January 2015
DocID026988 Rev 1
1/12
www.st.com
12