Headphone Interface - Quectel SC20-EL Manual

3.7.2. Headphone Interface

The following figure shows the reference circuit design for headphone interface.
MIC_GND
MIC2_P
HPH_L
HS_DET
HPH_R
HPH_REF
Module
Figure 18: Reference Circuit Design for Headphone Interface
The following figure shows the pin assignment of headphone interface.
Smart_ EVB_User_Guide
R4
R1
0R 0R
C2
C1
NM
NM
0R
33R R5
R6 33R
C6
C3 C4
100pF
33pF 33pF 33pF
2
3
5
Figure 19: Pin Assignment of Headphone Interface
F5
F1
F2
R2
20K
F3
F4
C5
D1 D2 D3 D4
R7 R8
10K10K
ESD
1
6
4
Smart LTE Module Series
Smart EVB User Guide
1
5
4
3
6
2
R3
0R
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