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11.2. Main PCB (RF Band)
POWER AMPLIFIER
19
VSENSE
15
RSVD
L302 1nH
DCS_PA
17
DCS/PCS OUT
DGND
DGND
L301 1.2nH
GSM_PA
12
GSM850/900 OUT
18
GND
21
GND
23
GND
DGND
DGND
28
GND
GSM_PA
DCS_PA
ANTENNA SWITCH / RF SWITCH
ANTENNA
ANTENNA
TESTPOINT
C329
C324
JP1
33p
3.3n
1
2
ANT
RF
3
4
GND
GND
ANTSW
RFSW
DGND
DGND
SWITCH MODE
GSM-TX
DCS-TX
GSM/DCS-RX 0.0V − 0.2V
20
VBATT
1
VCC_CMOS
+
+
8
VCC1
3
VCC1
R304 1K
APC
22
VAPC
U301
C313
PA
DGND
680p
R301 0
2
PAENA
PAC ENABLE
C302
DGND
4.7p
4
GSM_TXEN
BAND SELECT
R302
DCS_TX
5
2
1
DCS/PCS IN
2
1
4
3
4
3
DGND
DGND
R303
6
GSM_TX
2
1
GSM850/900 IN
2
1
4
3
4
3
DGND
DGND
DGND
FRONTEND
5
GSM TX
3
DCS TX
10
GSM_RX
GSM/850 RX
8
ANT
U321
FRONTEND
1
DCS_RX
DCS/1900 RX
11
VCON2(GSM TX)
2
U323
3
2
VCON1(DCS TX)
1
10K
DGND
DGND
U322
6
1
5
2
10K
4
3
VC1
VC2
DGND
0.0V − 0.2V
2.4V − 2.8V
2.4V − 2.8V
0.0V − 0.2V
0.0V − 0.2V
TRIBAND GSM TRANSCEIVER
VBAT
RXIN
RXIP
RXQP
RXQN
R348
1K
2
4
DGND
TXIN
TO
1
3
TXIP
IOTA
R350
1K
2
4
TXQP
1
3
TXQN
R351
220K
1
AFC
2
DGND
DCS_TX
HBTXOUT2
C355
12p
GSM_TX
LBTXOUT2
C357
7p
F321
2
GND1
OUT+
OUT−
C330
22p
1
IN
GND
F322
2
GND1
OUT+
DGND
DGND
OUT−
C321
33p
1
IN
GND
VRF
DGND
DGND
DGND
TRENA
GSM_TXEN
R321
3.3K
C327
22p
DGND
– 11-2 –
37
VCC12
38
IN
39
IP
VBAT1
40
QP
VBAT2
41
QN
VREG3
U342
VCC8
4
VCC10
IN
GND
48
3
C371
47p
REF_CLK
GND
OUT
XIN
VRIO
Crystal_26MHz
TSTVCO2
DGND
TSTVCO1
LNAPCSN
LNAPCSP
RTEMP_VTEST
VRF
SIOUT_TST
L342
15nH
HBTXOUT1
29
APC
HBTXOUT
U341
TRIBAND
GSM
TRANSCEIVER
XOUT
L342
15nH
LBTXOUT1
31
LBTXOUT
XSEL
XEN
STROBE
C332
22p
GSM_RXN
22
3
LNAGSMN
CLK
4
5
C331
22p
GSM_RXP
21
LNAGSMP
DATA
C323
15p
DCS_RXN
19
3
LNADCSN
4
RESETZ
5
18
C322
15p
DCS_RXP
REG1
LNADCSP
VCC13
DGND
VCC7
REG2
VCC1
VCC2
VCC3
VCC6
VCC4
25
DET1_POW
VCC5
26
DET2_CUR
28
VCC11
DAC
49
GND
VCC9
VBG
DGND
TO
BASEBAND
VBAT
44
24
VRF
23
30
33
VRIO
+
DGND
46
DGND
35
DGND
34
16
15
R345
0
14
R_TEMP_VTEST
TEMP_SEN
31
27
DGND
C370
1n
47
26MHz
1
TCXOEN
2
C341
2.2U
DGND
9
STROBE
RF_LE
R344
200
7
CLK
TEMP_SEN
DGND
R343
200
5
DATA
TEMP_SEN
DGND
R342
1K
3
RESETZ
TSPACT0
43
C365
2.2U
42
C364
100p
17
C361
100n
C351
100n
45
C342
100p
4
C342
100p
6
C344
100p
8
C346
100p
12
C349
1U
10
C347
1U
11
C348
1U
36
C360
100n
32
C358
100n
20
C352
100p
DGND
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