Earphone Application - Quectel 5G Module Series User Manual

3.4.1.2. Earphone Application

Audio interface is designed for earphone. A reference circuit design is shown by the following figure.
Codec
22uF
22uF
AGND
BTB CON
Figure 14: Reference Circuit Design for Earphone Application
The figure and table below illustrates the pin assignment and pin definition of earphone connector.
5G-REDCAP_EVB_User_Guide
46
Differential layout
J0502
MIC_N
MIC_P
SPK_L
1uF
SPK_R 1uF
10pF
Figure 15: Pin Assignment of J0503
Close to Socket
GND AGND
GND GND
10pF 33pF
4.7uF 75pF
15pF
Close to Socket
10pF 33pF
33pF
ESD
GND
5G Module Series
GND
ESD
AGND
0R J0503
2
NM_0R
4
6
5
3
1
Audio Jack
0R
MIC_P
AGND
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