Quectel Smart EVB G5 - Loudspeaker Interface

Smart Module Series
Smart_EVB_G5_User_Guide 43 / 66
Table 16: Description of Audio Interfaces
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.
SPK_P
SPK_N
1.0nF
Close to speaker
ESD
ESD
FB
FB
Module
1.0nF
J1203
Figure 24: Reference Design for Loudspeaker Interface
RefDes.
Description
J1203
⚫ Used for loudspeaker
⚫ Rated resistance: 8 Ω
⚫ Rated power: 1.5 W
J1204
⚫ Used for earphone
⚫ Rated resistance: 32 Ω
⚫ Rated power: 30 mW
U1201
Used for MEMS-type microphone
U1202
Used for ECM-type microphone
J1202
Audio jack for headset