Smart Machine Smart Decision
SIM7600E_SIM7600E-H-PCIE_Hardware_Design_V1.00 25 2017-11-23
10pF
33pF
33pF
33pF
MICP
MICN
Electret
Microphone
10pF
10pF
ESD
ANTI
ESD
ANTI
MODULE
The lines in bold type should be
accorded to differential signal
layout rules
These components should
be placed to microphone as
close as possible
Figure 18: Microphone interface configuration
Note: SIM7600E-PCIEA has integrated MIC bias circuit. There is no need to pull the MICP and MICN up to
the external power, just connect it to microphone. MICP and MICN must be differential lines.
Main audio parameters can be changed to satisfy users’ requirement. User can adjust them through AT
command according to their own electronic and mechanical design. For more details please refers to audio
application document.