Dual 50MHz to 1000MHz High-Linearity,
Serial/Parallel-Controlled Digital VGA
Typical Operating Characteristics
( Typical Application Circuit , V CC = V CC_AMP_1 = V CC_AMP_2 = V CC_RG = 5V , attenuators are set for maximimum gain, RF ports are
driven from 50ω sources, AMPSET = 0, PD_1 = PD_2 = 0, P IN = -20dBm, f RF = 350MHz, T C = +25°C, unless otherwise noted.)
170
SUPPLY CURRENT vs. V CC
T C = -40°C
24
GAIN vs. RF FREQUENCY
T C = -40°C
24
GAIN vs. RF FREQUENCY
160
22
22
V CC = 4.75V, 5.00V, 5.25V
T C = +25°C
150
140
T C = +85°C
20
18
T C = +85°C
T C = +25°C
20
18
130
4.750
4.875
5.000
5.125
5.250
16
50
250
450
650
850
1050
16
50
250
450
650
850
1050
25
15
5
V CC (V)
GAIN OVER ATTENUATOR SETTING
vs. RF FREQUENCY
1.00
0.75
0.50
0.25
0
-0.25
RF FREQUENCY (MHz)
ATTENUATOR RELATIVE
ERROR vs. RF FREQUENCY
1.00
0.75
0.50
0.25
0
-0.25
RF FREQUENCY (MHz)
ATTENUATOR ABSOLUTE
ERROR vs. RF FREQUENCY
-5
-0.50
ERROR FROM 23dB TO 24dB
-0.50
25dB
-0.75
-0.75
-15
-1.00
-1.00
24dB
50
250
450
650
850
1050
50
250
450
650
850
1050
50
250
450
650
850
1050
RF FREQUENCY (MHz)
INPUT MATCH OVER ATTENUATOR
SETTING vs. RF FREQUENCY
0
RF FREQUENCY (MHz)
0
RF FREQUENCY (MHz)
OUTPUT MATCH OVER ATTENUATOR
SETTING vs. RF FREQUENCY
-10
-20
16dB
8dB
0dB
-10
16dB, 31dB
2dB
-20
-30
-40
31dB
2dB
1dB
4dB
-30
0dB
1dB, 4dB, 8dB
-50
-40
0
200
400
600
800
1000
0
200
400
600
800
1000
6
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
相关PDF资料
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