Smart Machine Smart Decision
to the ATC manual.
3.4.1
Pin Description
Table 10: Pin description
Audio channel
Pin name
Pin No.
Function
MIC1P
36
MIC positive input
MIC1N
35
MIC negative input
EAR1P
33
Receiver positive output
Normal
EAR1N
34
Receiver negative output
MIC1P
36
MIC positive input
MIC1N
35
MIC negative input
SPK_P
37
Loudspeaker positive output
Hand-free
SPK_N
38
Loudspeaker negative output
Table 11: MIC input characteristics
Parameter
Min
Typ
Max
Unit
Working Voltage
-
1.8
-
V
Working Current
0.07
0.4
1
mA
External Microphone Load Resistance
1.2
2.2
k Ohms
Table 12: Audio output characteristics
Parameter
Min
Typ
Max
Unit
Load resistance
27
32
-
Ohm
Normal
(EAR_P,EAR_N)
Differential
Output power
-
50
-
mW
Table 13: Speaker output characteristics
Parameter
Min
Typ
Max
Unit
Quiescent Current
-
2.5
4
mA
Load resistance
-
8
-
Ohm
Output power(1KHz)
-
500
-
mW
3.4.2
Design Guide
There are three audio channels in SIM5320J-TE
,
including speaker output , receiver output and
microphone input.
SPEAKER circuit in SIM5320J-TE is a Class-D amplifier, optional EMI filter is shown in the following
figure; these components (two ferrite beads and two capacitors) can reduce electromagnetic interference. If
used, they should be located beside SPK_P and SPK_N pins. Considerable current flows in the channels,
SIM5320J-TE_Hardware Design_V1.01
2012-11-09
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