VCA2615 Datasheet, PDF (10/29 Pages) Texas Instruments – Dual, Low-Noise Variable-Gain Amplifier with Preamp

VCA2615
SBOS316C − JULY 2005 − REVISED SEPTEMBER 2005
www.ti.com
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.
INPUT−REFERRED NOISE vs FREQUENCY
(LNP Only)
10
LNP 00
LNP 01
1
LNP 10
LNP 11
0.1
1
10
Frequency (MHz)
Figure 25
−50
−52
−54
−56
−58
−60
−62
−64
−66
−68
−70
1
DISTORTION vs FREQUENCY
(2nd−Harmonic, Lo VGA Gain)
LNP 11
LNP 10
LNP 00
LNP 01
10
Frequency (MHz)
Figure 26
−40
LNP 11
LNP 10
LNP 01
−45 _{LNP 00}
DISTORTION vs FREQUENCY
(3rd−Harmonic, Lo VGA Gain)
−50
−55
−60
1
10
Frequency (MHz)
Figure 27
−50
−52
−54
−56
−58
−60
−62
−64
−66
−68
−70
1
DISTORTION vs FREQUENCY
(2nd−Harmonic, Hi VGA Gain)
LNP 11
LNP 10
LNP 00
LNP 01
10
Frequency (MHz)
Figure 28
−40
LNP 11
−45
LNP 10
LNP 01
LNP 00
−50
DISTORTION vs FREQUENCY
(3rd−Harmonic, Hi VGA Gain)
−55
−60
−65
−70
1
10
Frequency (MHz)
Figure 29
2nd−HARMONIC DISTORTION vs V_CNTL
(Lo VGA Gain)
−30
−35
LNP 00
−40
−45
LNP 01
−50
−55
LNP 11
−60
LNP 10
−65
−70
V_CNTL (V)
Figure 30
10