- 90 -
LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. Trouble Shooting
4.5.1 GSM Quad-Band PAM (U100: SKY77544)
The module consists of a GSM850/900 PA and DCS1800/PCS1900 PA block, impedance-matching circuitry for 50 Ω input and
output impedances, Tx harmonic filtering, high linearity-low insertion loss switches, and a CMOS Power Amplifier Control (PAC)
block. A custom silicon integrated circuit contains decoder circuitry to control the RF switch while providing a low current
external control interface. An integrated temperature sensor provides an analog voltage based on the temperature of the
module.
Applications
• Quad-band cellular handsets encompassing -Class 4 GSM850/900 -Class 1 DCS1800 PCS1900 -Class 12 GPRS
multi-slot operation -EDGE polar modulation -Triple band WCDMA antenna
switch support
Features
Small outline: 6 mm x 6 mm
Very low profile: 0.9 mm
28-pad package
Low input power range -0 to 6 dBm
High efficiency -GSM850 41% -GSM900 41% -DCS 38% -PCS 38%
Tx-VCO-to-antenna and antenna-to-Rx-SAW filter RF interface
Tx harmonics below -38 dBm
Wideband envelope control path
Input/Output matching 50 Ω internal
Low APC current 20 μA
High impedance control inputs 15 μA, typical
Integrated module temperature sensor
{wX
U100
31
30
29
44
43
42
41
40
39
38
73
63
53
16
15
41
31
21
11
01
34
33
32
17
9
18
8
19
7
20
6
21
5
22
4
32
3
42
2
52
62
72
82
1 DCS_PCS_IN
11
D
N
G
01
D
N
G
9
D
N
G
8
D
N
G
GND1
7
D
N
G
GSM_IN
6
D
N
G
VAPC
GND5
VBATT
GND4
BS2
GND3
BS1
GND2
_TXEN
ANT
E
D
O
M
WCDMA3
PGND4
PGND5
PGND6
P
M
ET
4
X
R
3
X
R
2
X
R
1
X
R
WCDMA1
WCDMA2
7
D
N
G
P
8
D
N
G
P
9
D
N
G
P
PGND10
PGND11
PGND12
PGND13
PGND14
PGND15
PGND16
PGND1
PGND2
PGND3
30
1
R
02
1
L100
18nH
L101
18nH
L102
10n
12n
L103
00
1
R
02
1
100n
L107
ANT101
VBAT
51
R104
68n
L108
10u
C113
L109
DNI
5.6n
L110
L111
DNI
DNI
L112
56p
51
1
C
61
1
C
56p
C117
100p
81
1
C
1.2n
100p
C119
2.7n
C120
FL101
1960MHz
4
5
1
3
2
G1 O1
IN
G2 O2
FL102
1842.5MHz
4
5
1
3
2
G1 O1
IN
G2 O2
942.5MHz
FL103
4
5
1
3
2
G1 O1
IN
G2 O2
881.5MHz
FL104
4
5
1
3
2
G1 O1
IN
G2 O2
32
1
C
1.2n
C124
2.7n
62
1
C
8.2n
68n
L113
100p
C128
93
1
C
8.2n
L114
8.2n
19
90
1
R
ANT102
39p
C149
8.2n
05
1
C
8.2n
15
1
C
R110
82
C153
1n
1n
C155
5.6n
L115
2.2n
L139
19
11
1
R
DNI
C157
33p
C159
6.8p
R112
100p
C160
DNI
R113
1n
C162
C164
1n
2.2K
R117
47p
C179
SW100
G1
A
C
G2
GND
WCDMA_1900_RTX
WCDMA_2100_RTX
DCS_PCS_TX
RX_PCS_P
RX_PCS_M
RX_DCS_P
RX_DCS_M
RX_GSM_900_P
RX_GSM_900_M
RX_GSM_850_P
RX_GSM_850_M
GSM_TX
GSM_PA_RAMP
ANT_SEL0
ANT_SEL1
ANT_SEL3
ANT_SEL2
WCDMA_900_RTX
0603
2mm
11dB
DCS(1805-1880 MHz)
PCS(1930-1990 MHz)
GSM(925-960 MHz)
GSM(869-894 MHz)
7dB
GSM850(824-849MHz)
80
61
GSM900(880-915MHz)
PCS(1850-1910 MHz)
DCS(1710-1785 MHz)
0603
0603
TP1
Содержание GT540
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