VCA2615 Datasheet, PDF (14/29 Pages) Texas Instruments – Dual, Low-Noise Variable-Gain Amplifier with Preamp

VCA2615
SBOS316C − JULY 2005 − REVISED SEPTEMBER 2005
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TYPICAL CHARACTERISTICS (continued)
All specifications at TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground; the input to the preamp (LNP) is single-ended;
fIN = 5MHz, LNP Gain (G1, G2) = 10, H/L = 0, V_CNTL = 2.5V; VCA output is 1VPP differential; CA, CB = 3.9µF, unless otherwise noted.
OUTPUT IMPEDANCE vs FREQUENCY
100
POWER UP/DOWN RESPONSE
H
L
10
1V_PP
1
0.1
1
10
100
Frequency (MHz)
Figure 49
GAIN CONTROL TRANSIENT RESPONSE
2V
0V
1V_PP
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
Time (µs)
Figure 51
0 5 10 15 20 25 30 35 40 45 50 55 60
Time (µs)
Figure 50
35
30
25
20
15
10
5
0
1
GROUP DELAY vs FREQUENCY
10
100
Frequency (MHz)
Figure 52
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