Loudspeaker Interface - Quectel Smart EVB G5 User Manual

Table 16: Description of Audio Interfaces
RefDes.
J1203
J1204
U1201
U1202
J1202

4.7.1. Loudspeaker Interface

Smart EVB G5 provides one loudspeaker interface and the loudspeaker is soldered onto the Smart EVB
G5 via test point J1203. The following figure shows a reference circuit design for loudspeaker interface.
Module
SPK_P
SPK_N
Smart_EVB_G5_User_Guide
Description
⚫
Used for loudspeaker
⚫ Rated resistance: 8 Ω
⚫
Rated power: 1.5 W
⚫
Used for earphone
⚫ Rated resistance: 32 Ω
⚫
Rated power: 30 mW
Used for MEMS-type microphone
Used for ECM-type microphone
Audio jack for headset
Figure 24: Reference Design for Loudspeaker Interface
1.0nF
FB
Close to speaker
FB
1.0nF
Smart Module Series
ESD
J1203
ESD
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