
50MHz to 1000MHz High-Linearity, Serial/
Parallel-Controlled Analog/Digital VGA
Typical Operating Characteristics (continued)
( V CC = +5.0V, HC mode , both attenuators set for maximum gain, P IN = -20dBm, f RF = 200MHz, and T C = +25°C, internal DAC refer-
ence used, unless otherwise noted.)
OIP2 vs. DIGITAL ATTENUATOR STATE
OIP2 vs. ANALOG ATTENUATOR STATE
75
P OUT = -3dBm/TONE
75
P OUT = -3dBm/TONE
70
65
T C = -40 ° C
RF = 200MHz
T C = +25 ° C
70
65
T C = -40 ° C
T C = +25 ° C
RF = 200MHz
60
60
55
T C = +85 ° C
55
50
45
40
50
45
40
T C = +85 ° C
0
4
8
12
16
20
24
28
32
0
32
64
96
128 160 192 224 256
3.0
2.5
2.0
1.5
1.0
0.5
0
DIGITAL ATTENUATOR STATE (dB)
DAC VOLTAGE vs. DAC CODE
T C = -40 ° C, +25 ° C, +85 ° C
3.0
2.5
2.0
1.5
1.0
0.5
0
DAC CODE
DAC VOLTAGE vs. DAC CODE
V CC = 4.75V, 5.00V, 5.25V
0
32
64
96
128 160 192 224 256
0
32
64
96
128 160 192 224 256
0.05
DAC CODE
DAC VOLTAGE DRIFT vs. DAC CODE
0.0100
DAC CODE
DAC VOLTAGE DRIFT vs. DAC CODE
0.04
0.03
0.02
0.01
0
-0.01
T C CHANGED FROM +25 ° C TO -40 ° C
0.0075
0.0050
0.0025
0
-0.0025
V CC CHANGED FROM 5.00V TO 5.25V
-0.02
-0.0050
-0.03
-0.04
-0.05
T C CHANGED FROM +25 ° C TO +85 ° C
-0.0075
-0.0100
V CC CHANGED FROM 5.00V TO 4.75V
0
32
64
96
128 160 192 224 256
0
32
64
96
128 160 192 224 256
DAC CODE
DAC CODE
10
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