Datasheet

-45
-50
-55
-60
-65
-70
-75
-80
-85
Frequency(MHz)
Gain(dB)
0.1 1 10 100
V
G
=+2V
A
VMAX
=20dB
V =2V
O
PP
R =100W
L
2nd-Harmonic
3rd-Harmonic
-60
-65
-70
-75
-80
-85
-90
Resistance( )W
HarmonicDistortion(dBc)
100 1k
V =+2V
G
A =20dB
VMAX
V =2V
O PP
f=20MHz
2nd-Harmonic
3rd-Harmonic
-55
-60
-65
-70
-75
-80
OutputVoltageSwing(V )
PP
HarmonicDistortion(dBc)
0.1 1 10
V =+2V
G
A
VMAX
=20dB
R =100W
L
f=20MHz
2nd-Harmonic
3rd-Harmonic
-40
-45
-50
-55
-60
-65
-70
GainControlVoltage(V)
HarmonicDistortion(dBc)
0.8 2.0
MaximumCurrentThroughR Limited
G
2nd-Harmonic
1.0 1.2 1.4 1.6 1.8
3rd-Harmonic
V =2V
A =20dB
R =100
f=20MHz
O PP
VMAX
L
W
45
40
35
30
25
20
Frequency(MHz)
InterceptPoint(+dBm)
5 15 2010 25 30 35 40 45 50 55 60 65 70
At50 MatchedLoadW
GainControlVoltage(V)
0.8 1.0 1.2 1.4 1.6 1.8 2.0
InterceptPoint(+dBm)
40
38
36
34
32
30
20
ConstantInputVoltage
Constant
OutputVoltage
f=20MHz
At50 MatchedLoadW
28
26
24
22
VCA820
SBOS395C –OCTOBER 2007–REVISED OCTOBER 2009............................................................................................................................................ www.ti.com
TYPICAL CHARACTERISTICS: V
S
= ±5V, A
VMAX
= 20dB (continued)
At T
A
= +25°C, R
L
= 100Ω, R
F
= 1kΩ, R
G
= 200Ω, V
G
= +2V, and V
IN
= single-ended input on +V
IN
with –V
IN
at ground, unless
otherwise noted.
HARMONIC DISTORTION vs FREQUENCY HARMONIC DISTORTION vs LOAD RESISTANCE
Figure 41. Figure 42.
20MHz HARMONIC DISTORTION
HARMONIC DISTORTION vs OUTPUT VOLTAGE vs GAIN CONTROL VOLTAGE
Figure 43. Figure 44.
2-TONE, 3RD-ORDER INTERMODULATION INTERCEPT (G
MAX
= 2-TONE, 3RD-ORDER INTERMODULATION INTERCEPT
+10V/V) vs GAIN CONTROL VOLTAGE (f
IN
= 20MHz)
Figure 45. Figure 46.
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