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.)
45
OUTPUT IP3 vs. RF FREQUENCY
(LOW-CURRENT MODE)
45
OUTPUT IP3 vs. RF FREQUENCY
(LOW-CURRENT MODE)
45
OUTPUT IP3 vs. ATTENUATOR STATE
(LOW-CURRENT MODE)
P OUT = 0dBm/TONE
V CC = 5.25V
P OUT = 0dBm/TONE
T C = +25 ° C, +85 ° C
TONE = LSB, USB
P OUT = -3dBm/TONE
f RF = 200MHz
40
T C = -40 ° C
40
V CC = 5.00V
40
35
35
30
25
T C = +85 ° C
T C = +25 ° C
30
25
V CC = 4.75V
35
30
T C = -40 ° C, TONE = LSB, USB
50
250
450
650
850
1050
50
250
450
650
850
1050
0
32
64
96
128 160 192 224 256
RF FREQUENCY (MHz)
2nd HARMONIC vs. RF FREQUENCY
(LOW-CURRENT MODE)
RF FREQUENCY (MHz)
2nd HARMONIC vs. RF FREQUENCY
(LOW-CURRENT MODE)
DAC CODE
2nd HARMONIC vs. ATTENUATOR STATE
(LOW-CURRENT MODE)
90
T C = -40 ° C
P OUT = 3dBm
90
V CC = 5.25V
P OUT = 3dBm
90
P OUT = 0dBm
f RF = 200MHz
80
70
T C = +25 ° C
80
70
V CC = 5.00V
80
70
60
50
40
T C = +85 ° C
60
50
40
V CC = 4.75V
60
50
T C = +25 ° C T C = -40 ° C
T C = +85 ° C
50
250
450
650
850
1050
50
250
450
650
850
1050
0
32
64
96
128 160 192 224 256
RF FREQUENCY (MHz)
3rd HARMONIC vs. RF FREQUENCY
(LOW-CURRENT MODE)
RF FREQUENCY (MHz)
3rd HARMONIC vs. RF FREQUENCY
(LOW-CURRENT MODE)
DAC CODE
3rd HARMONIC vs. ATTENUATOR STATE
(LOW-CURRENT MODE)
100
90
P OUT = 3dBm
100
90
V CC = 5.00V
P OUT = 3dBm
V CC = 5.25V
100
95
T C = +25 ° C
P OUT = 0dBm
f RF = 200MHz
T C = -40 ° C
90
80
80
85
70
T C = +25 ° C
70
80
T C = -40 ° C
T C = +85 ° C
60
T C = +85 ° C
60
V CC = 4.75V
75
70
50
250
450
650
850
1050
50
250
450
650
850
1050
0
32
64
96
128 160 192 224 256
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
DAC CODE
12
______________________________________________________________________________________
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