Quectel M10 - Earphone Interface Configuration

M10 Hardware Design
3.9.3 Earphone interface configuration
1
2
4
3
Amphenol
9001-8905-050
SPK2P
MIC2N
MIC2P
22uF
68R
33pF
GND GND
AGND
Close to Socket
Differential layout
33pF
AGND
33pF 10pF
GND
GND
GND
GND
AGND
MOUDLE
Figure 26: Earphone interface configuration
Table 12: MIC input characteristics
Parameter Min Typ Max Unit
Working Voltage 1.2 1.5 2.0 V
Working Current 200 500 uA
External
Microphone
Load Resistance
2.2 k Ohm
Table 13: SPK Output Characteristics
Parameter Min Typ Max Unit
load
Resistance
28 32 Ohm Single
Ended
Ref level 0 2.4 Vpp
load
Resistance
28 32 Ohm
Normal
Output(SPK1)
Differential
Ref level 0 4.8 Vpp
M10_HD_V1.00 - 43 -
Quectel