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1300MHz to 2700MHz Variable-Gain
Amplifier with Analog Gain Control
Typical Operating Characteristics
One Attenuator Configuration
(Typical Application Circuit with one attenuator connected, V CC = +5.0V, R1 = 1.2k ? , R2 = 2k ? , f IN = 2100MHz, maximum gain
setting, P OUT = +5dBm, linearity measured at P OUT = +5dBm/tone, T A = +25°C, unless otherwise noted.)
200
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
T A = +85 ° C
0
5
INPUT RETURN LOSS
vs. RF FREQUENCY
0
5
OUTPUT RETURN LOSS
vs. RF FREQUENCY
190
180
10
15
T A = -40 ° C
T A = +85 ° C
10
15
T A = -40 ° C
170
160
T A = +25 ° C
20
25
30
T A = +25 ° C
20
25
30
T A = +85 ° C
T A = +25 ° C
150
T A = -40 ° C
35
40
35
40
4.750
4.875
5.000
5.125
5.250
1500
1700
1900
2100
2300
2500
1500
1700
1900
2100
2300
2500
20
SUPPLY VOLTAGE (V)
GAIN vs. GAIN-CONTROL VOLTAGE
19
RF FREQUENCY (MHz)
GAIN vs. RF FREQUENCY
40
RF FREQUENCY (MHz)
REVERSE ISOLATION
vs. RF FREQUENCY
15
T A = -40 ° C
17
T A = -40 ° C
T A = +85 ° C
10
T A = +25 ° C
15
T A = +25 ° C
35
T A = +25 ° C
5
T A = +85 ° C
0
13
T A = +85 ° C
30
T A = -40 ° C
-5
11
-10
9
25
1.0
1.5
2.0
2.5
3.0
3.5
4.0
1500
1700
1900
2100
2300
2500
1500
1700
1900
2100
2300
2500
V CNTL (V)
INPUT RETURN LOSS
vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT RETURN LOSS
vs. RF FREQUENCY
RF FREQUENCY (MHz)
GAIN vs. RF FREQUENCY
0
0
20
MAXIMUM GAIN
5
10
15
9dB, 12dB, 15dB, 18dB
GAIN REDUCTION
MAX GAIN
5
10
15
15
10
20
25
20
25
MAX GAIN, 3dB, 6dB, 9dB, 12dB,
15dB, AND 18dB GAIN REDUCTION
5
0
30
35
40
6dB GAIN REDUCTION
3dB GAIN REDUCTION
30
35
40
-5
-10
18dB GAIN REDUCTION
1500
1700
1900
2100
2300
2500
1500
1700
1900
2100
2300
2500
1500
1700
1900
2100
2300
2500
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
4
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