Datasheet

10
1
0.1
GainResistor( )W
DifferentialInputVoltage(V )
PP
10 100 1k
I =2.6mA
RG MAX
V (V )=2 ´ R I (A )´
INMAX PP G RG MAX P
40
35
30
25
20
15
10
5
0
FeedbackResistor( )W
MaximumGainAdjustRange(dB)
100 1k 10k
I =2.6mA
RG
A (V/V)=2 ´ [R /V (V )] 2 I (A´ ´ )
VMAX F IN PP PRG
V =1V
O PP
V =2V
O PP
V =4V
O PP
V =3V
O PP
60
50
40
30
20
10
0
OutputVoltage(V )
PP
MaximumGainAdjustRange(dB)
0.1 1 10
I =2.6mA
RG
A (V/V)=2 ´ [R /V (V )] 2 I (A´ ´ )
VMAX F
IN
PPP RG
R
F
=3kW
R
F
=2kW
R
F
=1.5kW
R
F
=1kW
R
F
=500W
R
F
=4kW
R
F
=5kW
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)
12
10
8
6
4
2
0
RelativeErrorto
MaximumGain
Absolute
Error
Absolute
Error
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)
40
20
0
-20
-40
-60
-80
-100
A(V/V)=K ´ ´
R
F
R
G
1
1+e
V =0.85V
CTRL0
V =90mV
SLOPE
V -V
G0 G
V
SLOPE
( )
Equation
Data
1500
1400
1300
1200
1100
1000
900
800
700
A (V/V)
VMAX
FeedbackResistor( )W
1 10 100
NOTE: 3dBbandwidthwillvarywiththepackage.
SeetheApplicationsectionformoredetails.
-
VCA820
www.ti.com ............................................................................................................................................ SBOS395C –OCTOBER 2007–REVISED OCTOBER 2009
TYPICAL CHARACTERISTICS: V
S
= ±5V, DC Parameters
At T
A
= +25°C, R
L
= 100Ω, V
G
= +1V, and V
IN
= single-ended input on +V
IN
with –V
IN
at ground, unless otherwise noted.
MAXIMUM DIFFERENTIAL INPUT VOLTAGE MAXIMUM GAIN ADJUST RANGE
vs GAIN RESISTOR vs FEEDBACK RESISTOR
Figure 3. Figure 4.
MAXIMUM GAIN ADJUST RANGE GAIN ERROR BAND
vs PEAK-TO-PEAK OUTPUT VOLTAGE vs GAIN CONTROL VOLTAGE
Figure 5. Figure 6.
NOMINAL GAIN RECOMMENDED R
F
and R
G
vs CALCULATED GAIN vs A
VMAX
Figure 7. Figure 8.
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