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
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Quectel