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 = 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 STATE
3RD HARMONIC vs. RF FREQUENCY
3RD HARMONIC vs. RF FREQUENCY
70
f RF = 350MHz
P OUT = 0dBm
80
P OUT = 3dBm
80
P OUT = 3dBm
V CC = 3.3V
70
V CC = 3.3V
70
60
T C = +85°C
T C = -40°C
V CC = 3.30V
T C = +25°C
60
T C = +25°C
60
50
T C = -40°C
50
50
V CC = 3.135V
T C = +85°C
V CC = 3.465V
40
0
42
84
126
168
210
40
50
250
450
650
850
1050
40
50
250
450
650
850
1050
ANALOG ATTENUATOR STATE (DAC CODE)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
75
3RD HARMONIC
vs. DIGITAL ATTENUATOR STATE
f RF = 350MHz             P OUT = 0dBm
75
3RD HARMONIC
vs. ANALOG ATTENUATOR STATE
f RF = 350MHz             P OUT = 0dBm
70
OIP2 vs. RF FREQUENCY
P OUT = 0dBm/TONE
70
T C = -40°C
V CC = 3.3V
70
T C = -40°C
V CC = 3.3V
60
T C = +85°C
V CC = 3.3V
65
65
50
T C = +25°C
60
T C = +25°C
60
T C = +25°C
40
55
T C = +85°C
55
T C = +85°C
30
T C = -40°C
50
0
4 8 12 16 20 24
DIGITAL ATTENUATOR STATE (dB)
28
50
0
42 84 126 168
ANALOG ATTENUATOR STATE (DAC CODE)
210
20
50
250
450 650
RF FREQUENCY (MHz)
850
1050
OIP2 vs. RF FREQUENCY
OIP2 vs. DIGITAL ATTENUATOR STATE
OIP2 vs. ANALOG ATTENUATOR STATE
70
60
V CC = 3.465V
P OUT = 0dBm/TONE
70
60
f RF = 350MHz
T C = +85°C
P OUT = -3dBm/TONE
V CC = 3.3V
70
60
f RF = 350MHz
T C = +85°C
P OUT = -3dBm/TONE
V CC = 3.3V
50
V CC = 3.30V
50
T C = +25°C
50
T C = +25°C
40
30
V CC = 3.135V
40
40
20
30
T C = -40°C
30
T C = -40°C
50
250
450
650
850
1050
0
4
8
12
16
20
24
28
0
42
84
126
168
210
RF FREQUENCY (MHz)
DIGITAL ATTENUATOR STATE (dB)
ANALOG ATTENUATOR STATE (DAC CODE)
14
_____________________________________________________________________________________
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