Loud Speaker Interface Design; Audio Characteristics - Quectel M35 User Manual

3.8.5. Loud Speaker Interface Design

LOUDSPKP
Module
LOUDSPKN

3.8.6. Audio Characteristics

Table 11: Typical Electret Microphone Characteristics
Parameter
Working Voltage
Working Current
External Microphone Load Resistance
Table 12: Typical Speaker Characteristics
Parameter
Single-ended
AOUT1
Output
Differential
M35_User_Manual
Differential
layout
10pF
10pF
Figure 27: Loud Speaker Interface Design
Min.
1.2
200
Load resistance
Ref level
Load resistance
Confidential / Released
Close to Speaker
GND GND
33pF
0603
0603
0R
10pF
33pF
0603
0603
0R
33pF
0603
0603
GND GND
Typ.
1.5
2.2
Min. Typ.
32
0
32
GSM/GPRS Module Series
M35 User Manual
GND
ESD
8 ohm
ESD
GND
Max. Unit
2.0 V
500 uA
k Ohm
Max. Unit
Ohm
2.4 Vpp
Ohm
48 / 85