Wcdma Band1 Low Noise Amplifier; Only For Training And Service Purposes - LG KP270 Service Manual

3. TECHNICAL BRIEF

3.21 WCDMA Band1 Low Noise Amplifier

C563 10p
C565
DNI
[Figure 3.21-1] Schematic Diagram of WCDMA Band1 LNA (BGA711L7)
Pin# Symbol
1 RFIN
2 VEN
3 VGS
4 VCC
5 RREF
6 RFOUT
7 GND
LGE Internal Use Only
L511 3G_LNA_CTRL_BC1
2nH
3G_LNA_GAIN_CTRL
C569
100p
LNA input
Mode control
Gain step control
Supply voltage
Tunable current consumption
LNA output
Ground connection for band and control circuitry
[Table 3.21-1] BGA711L7 Pin description
- 64 -
2V85_VRF
U506 BGA711L7
1 6
RFIN RFOUT
2 5
EN RREF
3 4
GS VCC
C567
0.01u
Function
Copyright © 2008 LG Electronics. Inc. All right reserved.

Only for training and service purposes

R524
C568
27K
12p