1300MHz to 2700MHz Variable-Gain
Amplifier with Analog Gain Control
Typical Operating Characteristics
Two Attenuator Configuration
(Typical Application Circuit with two attenuators 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.)
0
5
INPUT RETURN LOSS
vs. RF FREQUENCY
0
5
OUTPUT RETURN LOSS
vs. RF FREQUENCY
10
15
T A = -40 ° C
10
15
T A = -40 ° C
20
25
30
T A = +85 ° C
T A = +25 ° C
20
25
30
T A = +25 ° C
T A = +85 ° C
35
40
35
40
1500
1700
1900
2100
2300
2500
1500
1700
1900
2100
2300
2500
15
RF FREQUENCY (MHz)
GAIN vs. GAIN-CONTROL VOLTAGE
17
RF FREQUENCY (MHz)
GAIN vs. RF FREQUENCY
5
-5
T A = +25 ° C
T A = +85 ° C
T A = -40 ° C
15
13
T A = -40 ° C
T A = +25 ° C
-15
-25
-35
11
9
7
T A = +85 ° C
1.0
1.5
2.0
2.5
3.0
3.5
4.0
1500
1700
1900
2100
2300
2500
V CNTL (V)
RF FREQUENCY (MHz)
_______________________________________________________________________________________
7
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