Quectel UMTS&LTE EVB - Earphone Interface (J601)

UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
UMTS&LTE_EVB_User_Guide Confidential / Released 24 / 44
4.5.2.2. Earphone Interface (J601)
Audio interface J601 is designed for earphones. The names of corresponding pins on EVB are shown in
Figure 16. A reference circuit designs for earphone interfaces J601 is shown as following figure.
SPK_L
MIC_N
MIC_P
75pF
GND GND
AGND
Close to Socket
Differential layout
15pF
10pF
33pF
GND
GND
AGND
Codec
ALC5616
TLV3104
Close to Socket
AGND
ESD
ESD
Audio Jack
22uF
U101
J601
1
4
5
3
2
SPK_R
10pF
33pF
22uF
6
MIC_P
0R
NM_0R
33pF
GND
AGND
0R
NM_0R
10pF
4.7uF
BTB CON
J501
Figure 15: Reference Circuit Design for Earphone Interface J601
Figure 16: Pin Assignments of J601
Quectel
Confidential