Dual 50MHz to 1000MHz High-Linearity,
Serial/Parallel-Controlled Analog/Digital VGA
Typical Operating Characteristics (continued)
( Typical Application Circuit , V CC = V CC_AMP_1 = V CC_AMP_2 = V CC_RG = 5.0V , attenuators are set for maximum gain, RF ports are
driven from 50 I sources, AMPSET = 0, PD_1 = PD_2 = 0, P IN = -20dBm, f RF = 350MHz, and T C = +25 N C, unless otherwise noted.)
T C = +85°C
65
60
55
50
2ND HARMONIC vs. DIGITAL
ATTENUATOR STATE
P OUT = 0dBm
f RF = 350MHz
T C = -40°C
T C = +25°C
70
65
60
55
50
2ND HARMONIC vs. ANALOG
ATTENUATOR STATE
P OUT = 0dBm
f RF = 350MHz
T C = +25°C
T C = +85°C
T C = -40°C
100
90
80
70
60
3RD HARMONIC vs. RF FREQUENCY
P OUT = 3dBm
T C = -40°C
T C = +25°C
T C = +85°C
45
0
4 8 12 16 20 24
DIGITAL ATTENUATOR STATE (dB)
28
45
0
42 84 126 168
ANALOG ATTENUATOR STATE (DAC CODE)
210
50
50
250
450 650
RF FREQUENCY (MHz)
850
1050
100
3RD HARMONIC vs. RF FREQUENCY
P OUT = 3dBm
85
3RD HARMONIC vs. DIGITAL
ATTENUATOR STATE
P OUT = 0dBm
90
3RD HARMONIC vs. ANALOG
ATTENUATOR STATE
P OUT = 0dBm
90
f RF = 350MHz
85
T C = -40°C
T C = +25°C
f RF = 350MHz
80
70
60
V CC = 5.25V
V CC = 4.75V
V CC = 5.00V
80
75
T C = -40°C
T C = +25°C
T C = +85°C
80
75
70
T C = +85°C
65
50
50
250
450 650
RF FREQUENCY (MHz)
850
1050
70
0
4 8 12 16 20 24
DIGITAL ATTENUATOR STATE (dB)
28
60
0
42 84 126 168
ANALOG ATTENUATOR STATE (DAC CODE)
210
OIP2 vs. RF FREQUENCY
OIP2 vs. RF FREQUENCY
OIP2 vs. DIGITAL ATTENUATOR STATE
70
P OUT = 0dBm/TONE
70
P OUT = 0dBm/TONE
65
P OUT = -3dBm/TONE
60
50
T C = +85°C
T C = +25°C
60
50
V CC = 5.25V
V CC = 5.00V
60
55
T C = +85°C
f RF = 350MHz
T C = +25°C
T C = -40°C
V CC = 4.75V
50
40
30
40
30
45
40
T C = -40°C
50
250
450
650
850
1050
50
250
450
650
850
1050
0
4
8
12
16
20
24
28
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
DIGITAL ATTENUATOR STATE (dB)
10
_____________________________________________________________________________________
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