VCA2615 Datasheet, PDF (11/29 Pages) Texas Instruments – Dual, Low-Noise Variable-Gain Amplifier with Preamp

VCA2615
www.ti.com
SBOS316C − JULY 2005 − REVISED SEPTEMBER 2005
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.
3rd−HARMONIC DISTORTION vs V_CNTL
(Lo VGA Gain)
−30
−35
−40
−45
−50
−55
−60
LNP 00
LNP 01
−65
LNP 10
LNP 11
−70
V_CNTL (V)
Figure 31
2nd−HARMONIC DISTORTION vs V_CNTL
(Hi VGA Gain)
−30
LNP 00
−35
LNP 10
LNP 01
−40
LNP 11
−45
−50
−55
−60
−65
−70
V_CNTL (V)
Figure 32
3rd−HARMONIC DISTORTION vs V_CNTL
(Hi VGA Gain)
−30
LNP 00
−35
LNP 01
−40
LNP 10
LNP 11
−45
−50
−55
−60
−65
−70
V_CNTL (V)
Figure 33
DISTORTION vs LNP Gain
(LNP Only)
−30
−35
−40
2nd−Harmonic
−45
−50
−55
−60
3rd−Harmonic
−65
−70
−75
−80
00
01
10
11
LNP Gain (G1, G2)
Figure 35
DISTORTION vs VCA Output Voltage
−30
−35
−40
−45
3rd−Harmonic
−50
−55
−60
2nd−Harmonic
−65
−70
0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
VCA Output (V_PP)
Figure 34
DISTORTION vs V_CNTL
(VGA Only, SE In/Diff Out, Lo Gain)
−20
2nd−Harmonic
−30
−40
−50
−60
3rd−Harmonic
−70
−80
V_CNTL (V)
Figure 36
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