VCA822 Datasheet, PDF (6/35 Pages) Texas Instruments – Wideband, > 40dB Gain Adjust Range, Linear in V/V VARIABLE GAIN AMPLIFIER

VCA822
SBOS343A – SEPTEMBER 2007 – REVISED OCTOBER 2007
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TYPICAL CHARACTERISTICS: V_S = ±5V, DC and Power-Supply 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.
1500
1400
RECOMMENDED R_F vs A_VMAX
For > 40dB Gain Adjust Range
SUPPLY CURRENT vs CONTROL VOLTAGE
(A_VMAX = +2V/V)
40
39
1300
1200
1100
1000
900
800 ^{NOTE: -3dB bandwidth varies with package type.}
See the Application section for more details.
700
1
10
100
A_VMAX (V/V)
Figure 9.
38
-I_Q
37
+I_Q
36
35
34
33
32
-1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1.0
Gain Control Voltage (V)
Figure 10.
SUPPLY CURRENT vs CONTROL VOLTAGE
(A_VMAX = +10V/V)
40
39
38
-I_Q
37
36
+I_Q
35
34
33
SUPPLY CURRENT vs CONTROL VOLTAGE
(A_VMAX = +100V/V)
40
39
38
-I_Q
37
36
+I_Q
35
34
33
32
-1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1.0
Gain Control Voltage (V)
Figure 11.
32
-1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1.0
Gain Control Voltage (V)
Figure 12.
TYPICAL DC DRIFT vs TEMPERATURE
1.0
35
Input Offset Voltage (V_OS)
V_G = 0V
0.5
Left Scale
30
0
25
Input Bias Current (I_B)
-0.5
Right Scale
20
-1.0
15
-1.5
10
-2.0
-2.5
10x Input Offset Current (I_OS)
Right Scale
-3.0
-50 -25
0
25
50
75
Temperature (°C)
Figure 13.
5
0
-5
100 125
6
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