50MHz to 1000MHz High-Linearity,
Serial/Analog-Controlled VGA
Typical Operating Characteristics (continued)
( V CC = V DD = +5.0V, LC mode , attenuator set for maximum gain, P IN = -20dBm, f RF = 200MHz, and T C = +25°C, internal DAC refer-
ence used, unless otherwise noted.)
85
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(LOW-CURRENT MODE)
24
GAIN vs. RF FREQUENCY
(LOW-CURRENT MODE)
24
GAIN vs. RF FREQUENCY
(LOW-CURRENT MODE)
T C = -40 ° C
23
T C = -40 ° C
23
75
T C = +25 ° C
22
21
T C = +25 ° C
22
21
V CC = 4.75V, 5.00V, 5.25V
20
20
65
T C = +85 ° C
19
18
T C = +85 ° C
19
18
17
17
55
16
16
4.750
4.875
5.000
5.125
5.250
50
250
450
650
850
1050
50
250
450
650
850
1050
0
V CC (V)
INPUT MATCH vs. ATTENUATOR SETTING
(LOW-CURRENT MODE)
RF FREQUENCY (MHz)
OUTPUT MATCH vs. ATTENUATOR SETTING
(LOW-CURRENT MODE)
0
7
RF FREQUENCY (MHz)
NOISE FIGURE vs. RF FREQUENCY
(LOW-CURRENT MODE)
-10
1000MHz
50MHz
-5
-10
450MHz
1000MHz
6
T C = +85 ° C
T C = +25 ° C
-20
-30
-15
5
4
200MHz
450MHz
-20
-40
-25
50MHz
200MHz
3
T C = -40 ° C
-50
-30
2
0
32
64
96
128 160 192 224 256
0
32
64
96
128 160 192 224 256
50
250
450
650
850
1050
7
DAC CODE
NOISE FIGURE vs. RF FREQUENCY
(LOW-CURRENT MODE)
18
DAC CODE
OUTPUT P 1dB vs. RF FREQUENCY
(LOW-CURRENT MODE)
18
RF FREQUENCY (MHz)
OUTPUT P 1dB vs. RF FREQUENCY
(LOW-CURRENT MODE)
6
V CC = 4.75V, 5.00V, 5.25V
17
T C = -40 ° C
T C = +25 ° C
17
V CC = 5.25V
V CC = 5.00V
5
4
16
15
16
15
V CC = 4.75V
3
2
14
13
T C = +85 ° C
14
13
50
250
450
650
850
1050
50
250
450
650
850
1050
50
250
450
650
850
1050
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
______________________________________________________________________________________
11
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