Wcdma Band1/8 Low Noise Amplifier - LG KM555 Service Manual

4. RF Circuit Technical Brief
C564 C565
1.8p DNI
C567
L512
2.2n
56p
C571
L516
1.8n
68p
C572 C573
3.3p DNI

4.6 WCDMA Band1/8 Low Noise Amplifier

Place near to each port
C588
1.5p
C591
L526
1.5p
3.3n
C592
3.9p
C595
L529
4.7p
4.7n
[Figure 4.6-1] Schematic Diagram of WCDMA Band1/8 LNA (BGA735L16)
LGE Internal Use Only
VBAT VBAT
U505
AWT6224R
RFOUT_IMT
8
GND1
9
GND2
10
VCCA
11
VCC
12
RFOUT_900
13
GND3
C574
14
PGND
15
1n
AWT6222 : BAND1/5
AWT6321 : BAND2/5
2V85_VRF
AWT6224 : BAND1/8
L520
47n
C584
0.1u
Band 1 / 2 Change
R517
L524 DNI
5.6n
R518
0
L527
12n
9
[Table 4.6-1] BGA735L16 Pin description
VBAT
Place near to each port
C561 C562
2.2n 2.2u
VEN_IMT
7
RFIN_IMT
6
NC_VMODE2
5
VBATT
4
3G_PA_MODE1
VMODE1
3
RFIN_900
2
VEN_900
1
C575 C576 C577
100p 10n 10n
6 17
RFINM PGND
7 16
RFINH RFOUTM
U506
8 15
BGA735
RFGNDM1 RFOUTH
9 14
RFGNDM2 RFOUTL
R522
33K
8
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C563
SAFEB1G95FL0F00
47p
L511
C570 DNI
DNI
FL1
SAFEA897MFL0F00
C579
47p
C583
C580
DNI
DNI
Band 1 / 2 Change
R519 DNI
R520 0
L525
3.3n
Only for training and service purposes
WCDMA_1900
WCDMA_2100
FL501
C566
1 3
OUT IN1
DNI
2 4
G1 IN2
5
G2
BC1 : SAFEB1G95FL0F00
BC2 : SAFEA1G88FL0F00
WCDMA_850
WCDMA_900
5 2
G2 G1
L517
IN2
4 5.6p
OUT IN1
1 3
897.5 MHz
BC5 : SAFEB836MFL0F00
BC8 : SAFEA897MFL0F00
WCDM
C586
WCDM
47p
C589 C590
BC1 : SAFE
DNI DNI
BC2 : SAFE
C594
C597 C598
47p
DNI DNI BC5 : SAFEB
BC8 : SAFEB
7
L509
1.5n
L513
1.5n
L518
1.8n
L521
1.8n
WCD
WCD