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STB7003
TRI-BAND GSM/DCS/PCS LNA
SUPPLY VOLTAGE 2.8V
LOW CURRENT CONSUMPTION
VERY LOW NOISE FIGURE:
NF=1.5dB @ 950MHz
NF=1.9dB @ 1850MHz
NF=2dB @ 1950MHz
DIGITAL GAIN CONTROL
APPLICATIONS
TRI-BAND GSM/DCS/PCS FRONT-ENDS
MSOP10-EP
(exposed pad)
ORDER CODE
STB7003
BRANDING
7003
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION
The STB7003 is a tri-band LNA designed for GSM/DCS/
PCS applications. The GC pin sets the LNA gain levels.
The innovative architecture implemented allows to
reach very low current consumption. LNA1 works at
0.9-1.0 GHz and LNA2 over the 1.8-2GHz frequency
range.
PD
AI1
GND
AI2
BSW
LNA1
LNA2
GC
AO1
VccGSM
AO2
VccDCS
ABSOLUTE MAXIMUM RATING
Symbol
Parameter
Vcc Supply voltage
Tj Junction temperature
Tstg Storage temperature
THERMAL DATA
Symbol
Parameter
Rth(j-a) Thermal resistance junction-ambient
Value
4.5
150
-40 to +85
Value
TBD
Unit
V
oC
°C
Unit
oC/W
January, 22 2002
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STB7003
ELECTRICAL CHARACTERISTICS (Vcc = 2.8V, Tamb= 25 oC)
Symbol
Parameter
Test conditions
Vcc Supply voltage
IPD Sleep supply current
Min.
2.7
LNA1 @ 950MHz
Icc Supply current
G Power gain
NF
P1dB
IIP3
VSWRi
VSWRo
Noise figure
Input 1 dB compr.
power
Input third order
intercept
Input VSWR
Output VSWR
Gp1(1)
Gp2(1)
Gp1
Gp2
Gp1
Gp2
Gp1(2)
Gp2(2)
Typ.
4.5
-1
16
5.5
1.5
-19
-21
-10.8
-12.6
2:1
2:1
LNA2 @ 1850MHz
Icc Supply current
G Power gain
NF
P1dB
IIP3
VSWRi
VSWRo
Noise figure
Input 1 dB compr.
power
Input third order
intercept
Input VSWR
Output VSWR
Gp1(1)
Gp2(1)
Gp1
Gp2
Gp1
Gp2
Gp1(3)
Gp2(3)
7.3
-4
14.7
9.6
1.9
-11.5
-13.1
-1.4
-3.5
2:1
2:1
LNA2 @ 1950MHz
Icc Supply current
G Power gain
NF
P1dB
IIP3
VSWRi
VSWRo
Noise figure
Input 1 dB compr.
power
Input third order
intercept
Input VSWR
Output VSWR
Gp1(1)
Gp2(1)
Gp1
Gp2
Gp1
Gp2
Gp1(4)
Gp2(4)
7.3
-4.5
14.7
9.8
2
-10.8
-12.6
-1.5
-3.7
2:1
2:1
Note(1) : Gp1 min gain, Gp2 max gain.
Note(2) : Measured data with two tones fIN1 = 945 MHz, fIN2 = 945.8 MHz, PIN = - 33 dBm for each tone
Note(3) : Measured data with two tones fIN1 = 1850 MHz, fIN2 = 1850.8 MHz, PIN = - 33 dBm for each tone
Note(4) : Measured data with two tones fIN1 = 1960 MHz, fIN2 = 1960.8 MHz, PIN = - 33 dBm for each tone
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Max.
3.3
5
Unit
V
uA
mA
dB
dB
dBm
dBm
mA
dB
dB
dBm
dBm
mA
dB
dB
dBm
dBm

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GAIN SELECTION
BSW
GC
GSM
LNA1
0 0 High gain
0 1 Low gain
1 0 Off
1 1 Off
DCS/PCS
LNA2
Off
Off
High gain
Low gain
PINOUT
Pin Number
1
2
3
4
5
6
7
8
9
10
Symbol
PD
AI1
GND
AI2
BSW
VccDCS
AO2
VccGSM
AO1
GC
STB7003
Description
Power down
GSM LNA1 input
Ground
DCS/PCSl LNA2 input
Band switch between GSM and DCS/PCS RF output
DCS Supply voltage
DCS/PCS LNA2 output
GSM/BiAS Supply voltage
GSM LNA1 output
LNA1/2 gain control
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STB7003
TYPICAL PERFORMANCE (GSM BAND)
Power Gain vs. Frequency
Noise Figure vs. Frequency
20
High Gain
15
10
5
Low Gain
0
-5
800 820 840 860 880 900 920 940 960 980 1000
FREQUENCY (MHz)
7
6 Low Gain
5
4
3
2 High Gain
1
920 930 940 950 960 970
Frequency (MHz)
Input Return Loss vs. Frequency
Output Return Loss vs. Frequency
0
-2
-4
-6 HIgh Gain
-8
-10
Low Gain
-12
-14
800 820 840 860 880 900 920 940 960 980 1000
FREQUENCY (MHz)
0
-5
-10
-15 High Gain
-20
Low Gain
-25
800 820 840 860 880 900 920 940 960 980 1000
FREQUENCY (MHz)
Reverse Isolation vs. Frequency
-40
-41
HIgh Gain
-42
-43
-44
-45 Low Gain
-46
-47
-48
800 820 840 860 880 900 920 940 960 980 1000
FREQUENCY (MHz)
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TYPICAL PERFORMANCE (DCS / PCS BAND)
Power Gain vs. Frequency
Noise Figure vs. Frequency
STB7003
20
High Gain
15
10
5
0
Low Gain
-5
-10
1800 1820 1840 1860 1880 1900 1920 1940 1960 1980 2000
FREQUENCY (MHz)
11
10
9
8
7
6
5
4
3
2
1
1800
Low Gain
High Gain
1850
1900
1950
FREQUENCY (MHz)
2000
Input Return Loss vs. Frequency
Output Return Loss vs. Frequency
0
-2
-4
-6
-8 High Gain
-10
-12
-14
-16 Low Gain
-18
-20
1800 1820 1840 1860 1880 1900 1920 1940 1960 1980 2000
FREQUENCY (MHz)
0
-2
-4
-6
-8
High Gain
-10
Low Gain
-12
1800 1820 1840 1860 1880 1900 1920 1940 1960 1980 2000
FREQUENCY (MHz)
Reverse Isolation vs. Frequency
-35
-36
-37
-38
-39 High Gain
-40
-41
-42 Low Gain
-43
-44
1800 1820 1840 1860 1880 1900 1920 1940 1960 1980 2000
FREQUENCY (MHz)
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