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3. TECHNICAL BRIEF
The RF7161 also integrates an ESD filter to provide excellent ESD protection at the antenna port.
The RF7161 is designed to provide maximum efficiency at rated POUT.
1. X = DON'T CARE
2. RX1, RX2, RX3, and RX4 are broadband receive ports and each supports the GSM850, GSM900, DCS, and PCS bands.
RF PART
GND403
GND404
ANT403
C487
R414
1.2n
DNI
C423
1n
C424
7p
6.8n
C425
C421
MODE
LOW POWER MODE
RX1(EGSM_RX)
RX2(GSM850_RX)
RX3(PCS_RX)
RX4(DCS_RX)
GSM850/900_TX
DCS/PCS_TX
LGE Internal Use Only
Figure 3.3.2 Band SW Logic Table
R413
TX_RAMP
TX_EN
BS1
BS2
BS3
SW401
G2
ANT
RF
G1
C470
C471
DNI
1.2p
1p
TX_EN
BS3
BS2
BS1
(TX_ENABLE)
(GPCTRL2)
(GPCTRL1)
(GPCTRL0)
LOW
LOW
LOW
LOW
LOW
HIGH
LOW
LOW
LOW
LOW
HIGH
LOW
LOW
LOW
HIGH
HIGH
LOW
LOW
LOW
HIGH
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
HIGH
Figure 3.3.3 FEM CIRCUIT DIAGRAM
3. TECHNICAL BRIEF
1K
C461
C454
C464
C463
C466
1n
1n
1n
1n
39p
17
GPCTRL2
GND1
16
GND9
GND2
15
U404
GND8
RFIN_LB
14
ANT
GND3
13
DCS
RX4
RFIN_HB
12
PCS
RX3
GND4
GSM850
EGSM
FL403
DCS
C456
33p
1
8
IN_1842_5
OUT_1842_5
C457
33p
PCS
4
9
IN_1960
OUT_1960
2
7
GND1
GND2
3
6
GND3
GND4
5
10
GND5
GND6
1805M1880M,1930M1990M
FL402
GSM850
C458
33p
1
8
IN_881_5
OUT_881_5
C467
33p
EGSM
4
9
IN_942_5
OUT_942_5
2
7
GND1
GND2
3
6
GND3
GND4
5
10
GND5
GND6
869M894M,925M960MHz
- 4 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
VBAT
C453
C455
C465
C459
10n
33p
4.7u
4.7u
1
2
L416
4.7n
C450
56p
3
GSM_OUT
4
L404
3.3n
L403
3.3n
C451
22p
5
DCS_PCS_OUT
6
L405
1.5n
C462
1p
C452
RX34X
1n
0.5p
0.5p
L402
L408
C460
RX34
1n
L409
RX12X
8.2n
L410
33n
L407
12n
L406
RX12
8.2n
Only for training and service purposes
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