Datasheet

GainControlVoltage(V)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Gain(V/V)
11
10
9
8
7
6
5
4
3
2
1
0
-1
Frequency(Hz)
1M 1G
NormalizedGain(dB)
3
0
-3
-6
-9
-12
-15
10M 100M
V =1V +10mV
G DC PP
V =0.1V
IN DC
Time(10ns/div)
InputV
oltage(V)
OutputVoltage(V)
2.5
2.0
1.5
1.0
0.5
0
-0.5
4
3
2
1
0
-1
V =0.2V
IN DC
5
4
3
2
1
0
-1
-2
-3
-4
-5
OutputCurrent(mA)
OutputVoltage(V)
-150 -100 -50 1500 50 100
25W
Load
1WInternal
Power
Dissipation
1WInternal
Power
Dissipation
100W
Load
50W
Load
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
InputV
oltage(V)
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
OutputVoltage(V)
Time(40ns/div)
InputVoltage
LeftScale
OutputVoltage
RightScale
A =+10V/V
VMAX
V
G
= 0.7V
Frequency(Hz)
1M 1G
NormalizedGain(dB)
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
10M 100M
V =+2V
G
V =0V
G
V =2V
O PP
InputReferred
VCA821
www.ti.com ....................................................................................................................................... SBOS407B – DECEMBER 2007 – REVISED DECEMBER 2008
TYPICAL CHARACTERISTICS: V
S
= ± 5V, A
VMAX
= 20dB (continued)
At T
A
= +25 ° C, R
L
= 100 Ω , R
F
= 402 Ω , R
G
= 80 Ω , V
G
= +2V, and V
IN
= single-ended input on +V
IN
with – V
IN
at ground, unless
otherwise noted.
GAIN vs GAIN CONTROL VOLTAGE GAIN CONTROL FREQUENCY RESPONSE
Figure 45. Figure 46.
GAIN CONTROL PULSE RESPONSE OUTPUT VOLTAGE AND CURRENT LIMITATIONS
Figure 47. Figure 48.
FULLY-ATTENUATED RESPONSE I
RG
LIMITED OVERDRIVE RECOVERY
Figure 49. Figure 50.
Copyright © 2007 – 2008, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Link(s): VCA821