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 = 3.3V , attenuators are set for maximimum gain, RF ports are
driven from 50ω sources, AMPSET = 1, PD_1 = PD_2 = 0, P IN = -20dBm, f RF = 350MHz, T C = +25°C, unless otherwise noted.)
3RD HARMONIC vs. RF FREQUENCY
3RD HARMONIC vs. RF FREQUENCY
80
70
T C = -40°C
V CC = 3.3V
P OUT = 3dBm
80
70
V CC = 3.465V
P OUT = 3dBm
60
T C = +25°C
60
V CC = 3.135V
50
T C = +85°C
50
V CC = 3.3V
40
50
250
450
650
850
1050
40
50
250
450
650
850
1050
RF FREQUENCY (MHz)
3RD HARMONIC vs. ATTENUATOR STATE
RF FREQUENCY (MHz)
OUTPUT IP2 vs. RF FREQUENCY
70
65
T C = -40°C
V CC = 3.3V
P OUT = 3dBm
f RF = 350MHz
70
60
T C = +85°C
V CC = 3.3V
P OUT = 0dBm/TONE
50
60
T C = +25°C
40
55
T C = +85°C
30
T C = +25°C
T C = -40°C
50
0
4
8
12
16
20
24
28
20
50
250
450
650
850
1050
ATTENUATOR STATE (dB)
OUTPUT IP2 vs. RF FREQUENCY
RF FREQUENCY (MHz)
OUTPUT IP2 vs. ATTENUATOR STATE
70
60
V CC = 3.465V
P OUT = 0dBm/TONE
70
60
P OUT = 0dBm/TONE
T C = +85°C
f RF = 350MHz
V CC = 3.3V
50
40
V CC = 3.3V
50
T C = -40°C
T C = +25°C
30
V CC = 3.135V
40
20
50
250
450
650
850
1050
30
0
4
8
12
16
20
24
28
12
RF FREQUENCY (MHz)
ATTENUATOR STATE (dB)
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