Reference Circuit Design For Earpiece Interface; Reference Circuit Design For Headset Interface - Quectel SC262R Series Hardware Design

Figure 25: Reference Circuit Design for MEMS Microphone Interface

3.22.2. Reference Circuit Design for Earpiece Interface

Figure 26: Reference Circuit Design for Earpiece Interface

3.22.3. Reference Circuit Design for Headset Interface

Module
Figure 27: Reference Circuit Design for Headset Interface
SC262R_Series_Hardware_Design
MIC_BIAS1
MIC_ GND
C1
33 pF
MIC3_P
Module
EAR_P
EAR_N
Module
MIC_GND
F1
MIC2_P
HPH_L
R2
HS_DET
20K
HPH_R
HPH_REF
C3
33 pF
C4
F1
100 nF
R1
0R
R2
0R
C2
33 pF
C2
33 pF
R1
0R
C1
33 pF
R2
0R
C3
33 pF
R1
0R
F2
F3
F4
C4 C5
D1 D2 D3 D4
33 pF 33 pF
ESD
Smart Module Series
1
2
VDD
GND
3
GND
OUT
4
D1
MEMS MIC
D1 D2
1
5
4
3
6
2
R3
0R
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