Smart LTE Module Series
SC600Y&SC600T Hardware Design
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3.23.1. Reference Circuit Design for Microphone Interfaces
MIC1_P
ECM-MIC
R2
R1
Module
D1
MIC1_N
33pF
C1
0R
0R
R3
0R
Figure 27: Reference Circuit Design for Analog ECM-type Microphone
MIC3_P
33pF
MEMS-MIC
R2
R1
C2
Module
MIC_ GND
0R
C1
MIC_ BIAS
1
2
3
4
F1
D1
OUT
GND
GND
VDD
100nF
C4
0R
33pF
Figure 28: Reference Circuit Design for MEMS-type Microphone