Dual 50MHz to 1000MHz High-Linearity,
Serial/Analog-Controlled 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 maximum gain, RF ports are
driven from 50 I sources, AMPSET = 1, PD_1 = PD_2 = 0, P IN = -20dBm, f RF = 350MHz, and T C = +25 N C, unless otherwise noted.)
2nd HARMONIC vs. ANALOG
ATTENUATOR SETTING
3rd HARMONIC vs. RF FREQUENCY
3rd HARMONIC vs. RF FREQUENCY
60
RF = 350MHz
P OUT = 0dBm
V CC = 3.3V
80
P OUT = 3dBm
V CC = 3.3V
80
P OUT = 3dBm
55
70
T C = -40°C
70
V CC = 3.30V
T C = +85°C
60
T C = +25°C
60
50
T C = +25°C
50
50
V CC = 3.135V
45
T C = -40°C
40
T C = +85°C
40
V CC = 3.465V
40
0
32
64
96
128 160 192 224 256
30
50
250
450
650
850
1050
30
50
250
450
650
850
1050
ANALOG ATTENUATOR SETTING (DAC CODE)
3rd HARMONIC vs. ANALOG
ATTENUATOR SETTING
RF FREQUENCY (MHz)
OIP2 vs. RF FREQUENCY
RF FREQUENCY (MHz)
75
70
RF = 350MHz
T C = -40°C
P OUT = 0dBm
V CC = 3.3V
70
60
P OUT = 0dBm/TONE
V CC = 3.3V
T C = +25°C
65
50
T C = +85°C
60
T C = +25°C
40
55
50
T C = +85°C
30
20
T C = -40°C
0
32
64
96
128 160 192 224 256
50
250
450
650
850
1050
ANALOG ATTENUATOR SETTING (DAC CODE)
OIP2 vs. RF FREQUENCY
RF FREQUENCY (MHz)
OIP2 vs. ANALOG ATTENUATOR SETTING
70
60
V CC = 3.465V
P OUT = 0dBm/TONE
60
RF = 350MHz
P OUT = -3dBm/TONE
V CC = 3.3V
T C = +85°C
50
V CC = 3.30V
50
40
40
30
V CC = 3.135V
T C = +25°C
T C = -40°C
20
50
250
450
650
850
1050
30
0
32
64
96
128 160 192 224 256
RF FREQUENCY (MHz)
ANALOG ATTENUATOR SETTING (DAC CODE)
12
_____________________________________________________________________________________
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