
Smart Machine Smart Decision
SIM5800_Hardware Design_V1.01
35
2018-10-08
MIC1P
4
I
Microphone input , positive
MIC1N
5
I
Microphone input , negative
EAR_MICP
6
I
Ear_microphone input , positive
GND_EARMICN
7
P
Ear_microphone input , negative (GND)
MIC2P
178
I
Microphone input 2, positive
MIC2N
177
P
Microphone input 2, negative (GND)
MIC_BIAS0
175
P/O
Microphone bias of MIC1P/1N and MIC2P/2N
MIC_BIAS1
176
P/O
Microphone bias of EAR_MICP
REC_P
8
O
Receiver output positive
REC_N
9
O
Receiver output negative
SPK_P
10
O
Speaker output positive
SPK_N
11
O
Speaker output negative
HPH_R
136
O
Headphone output, right channel
HPH_L
138
O
Headphone output, left channel
HS_DET
139
I
Headphone detection
4.12.1
Receiver Interface
EAR_P
Close to receiver
TVS
TVS
10pF
33pF
33pF
33pF
Module
EAR_N
10pF
10pF
10pF
33pF
33pF
33pF
10pF
10pF
differential signal
& shielded by GND
Figure 26: Receiver reference circuit
Table 13: Performance parameters of the receiver
Test Condition
Parameters
Min
Typ
Max
Unit
32 Ω load f = 1 kHz, 0 dB gain
Output power
85
-
mW
SNR
92
-
dB(A)
THD @Pout=10mW
@Pout=50mW
-77
-74
dB
THD+N @Pout=10mW
@Pout=50mW
-76
-74
dB