1575MHz GPS Front-End Amplifier
Typical Operating Characteristics (continued)
(P IN = -40dBm, f IN = 1575MHz, inputs and outputs are terminated to 50 ? , V CC = +5.0V, T A = +25°C, unless otherwise noted.)
AMP 1 GAIN vs. FREQUENCY
(WITH EXTERNAL INPUT IMPEDANCE MATCH)
20
18
AMP 2 GAIN vs. FREQUENCY
AMP 1 INPUT P 1dB vs. TEMPERATURE
(WITHOUT EXTERNAL INPUT IMPEDANCE MATCH)
-16
19
18
17
16
14
12
HIGH-GAIN MODE
-17
-18
10
16
8
-19
15
14
13
6
4
2
LOW-GAIN MODE
-20
-21
12
800
1000
1200
1400
1600
1800
2000
0
800
1000
1200
1400
1600
1800
2000
-22
-40
-20
0
20
40
60
80
100
5.8
5.6
5.4
5.2
5.0
4.8
FREQUENCY (MHz)
AMP 2 OUTPUT P 1dB vs. TEMPERATURE
(PIN 7 OPEN)
FREQUENCY (MHz)
AMP 1 S11
(WITHOUT EXTERNAL INPUT IMPEDANCE MATCH)
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
-5.0
-4
-6
-8
-10
-12
-14
-16
TEMPERATURE ( ° C)
AMP 1 S22
-40
-20
0
20
40
60
80
100
800
1000
1200
1400
1600
1800
2000
800
1000
1200
1400
1600
1800
2000
0
-5
-10
-15
-20
-25
TEMPERATURE ( ° C)
AMP 2 S11
FREQUENCY (MHz)
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
FREQUENCY (MHz)
AMP 2 S22
800
1000
1200
1400
1600
1800
2000
800
1000
1200
1400
1600
1800
2000
FREQUENCY (MHz)
FREQUENCY (MHz)
4
_______________________________________________________________________________________
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