
Dual 50MHz to 1000MHz High-Linearity,
Serial/Parallel-Controlled Digital VGA
Typical Operating Characteristics (continued)
( 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.)
OUTPUT IP3 vs. RF FREQUENCY
OUTPUT IP3 vs. RF FREQUENCY
OUTPUT IP3 vs. ATTENUATOR STATE
50
45
P OUT = 0dBm/TONE
50
45
V CC = 5.00V
P OUT = 0dBm/TONE
45
T C = -40°C, LSB, USB
P OUT = 0dBm/TONE
f RF = 350MHz
40
35
30
25
20
T C = -40°C
T C = +85°C
T C = +25°C
40
35
30
25
20
V CC = 4.75V
V CC = 5.25V
40
35
30
T C = +25°C, LSB, USB
T C = +85°C, LSB, USB
50
250
450
650
850
1050
50
250
450
650
850
1050
0
4
8
12
16
20
24
28
RF FREQUENCY (MHz)
2ND HARMONIC vs. RF FREQUENCY
RF FREQUENCY (MHz)
2ND HARMONIC vs. RF FREQUENCY
ATTENUATOR STATE (dB)
2ND HARMONIC vs. ATTENUATOR STATE
70
60
P OUT = 3dBm
T C = +85°C
70
60
V CC = 5.25V
P OUT = 3dBm
V CC = 5.00V
65
60
T C = +85°C
P OUT = 3dBm
f RF = 350MHz
55
50
50
40
T C = -40°C
T C = +25°C
40
V CC = 4.75V
50
45
T C = -40°C
T C = +25°C
30
30
40
50
250
450
650
850
1050
50
250
450
650
850
1050
0
4
8
12
16
20
24
28
RF FREQUENCY (MHz)
3RD HARMONIC vs. RF FREQUENCY
RF FREQUENCY (MHz)
3RD HARMONIC vs. RF FREQUENCY
ATTENUATOR STATE (dB)
3RD HARMONIC vs. ATTENUATOR STATE
100
90
P OUT = 3dBm
100
90
V CC = 5.25V
P OUT = 3dBm
80
T C = -40°C
P OUT = 3dBm
f RF = 350MHz
80
T C = -40°C
80
V CC = 5.00V
75
T C = +25°C
70
T C = +85°C
70
V CC = 4.75V
70
T C = +85°C
T C = +25°C
60
60
50
50
65
50
250
450
650
850
1050
50
250
450
650
850
1050
0
4
8
12
16
20
24
28
8
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
ATTENUATOR STATE (dB)