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3. TECHNICAL BRIEF
3.21 WCDMA Band1 Low Noise Amplifier
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C567
0.01u
2V85_VRF
2
EN
3
GS
7
PGND
1
RFIN
6
RFOUT
RREF
5
VCC
4
U506
BGA711L7
R524
27K
C565
DNI
C569
100p
12p
C568
10p
C563
2nH
L511
3G_LNA_CTRL_BC1
3G_LNA_GAIN_CTRL
[Figure 3.21-1] Schematic Diagram of WCDMA Band1 LNA (BGA711L7)
[Table 3.21-1] BGA711L7 Pin description
Pin#
Symbol
Function
1 RFIN
LNA
input
2 VEN
Mode
control
3
VGS
Gain step control
4 VCC
Supply
voltage
5
RREF
Tunable current consumption
6 RFOUT
LNA
output
7
GND
Ground connection for band and control circuitry