Datasheet
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SBOS316D − JULY 2005 − REVISED OCTOBER 2008
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8
TYPICAL CHARACTERISTICS (continued)
All specifications at T
A
= +25°C, V
DD
= 5V, load resistance = 500Ω on each output to ground; the input to the preamp (LNP) is single-ended;
f
IN
= 5MHz, LNP Gain (G1, G2) = 10, H
/L = 0, V
CNTL
= 2.5V; VCA output is 1V
PP
differential; CA, CB = 3.9µF, unless otherwise noted.
Figure 13
25
20
15
10
5
0
−
5
GAIN vs FREQUENCY
(LNP Only)
Frequency (MHz)
0.1 1 10 100
Gain (dB)
LNP = 11
LNP = 10
LNP = 00
LNP = 01
Figure 14
45
40
35
30
25
20
15
10
5
0
−
5
−
10
GAIN vs FREQUENCY
(VGA Only)
Frequency (MHz)
0.1 1 10 100
Gain (dB)
Hi Gain,
V
CNTL
2.5V
Lo Gain,
V
CNTL
2.5V
Lo Gain,
V
CNTL
0.7V
Hi Gain,
V
CNTL
0.7V
Figure 15
64
63
62
61
60
59
58
57
56
55
GAIN vs FREQUENCY
(LNP (G1, G2) = 11, Various VGA Gain Capacitors)
Frequency (MHz)
0.1 1 10 100
Gain (dB)
3.9
µ
F
0.1
µ
F
0.022
µ
F
4700pF
Figure 16
OUTPUT−REFERRED NOISE vs V
CNTL
(VGA Lo Gain, R
S
=0
Ω
)
V
CNTL
(V)
0.2
0.3
Noise (nV/√Hz)
1000
100
10
0.4
0.5
0.6
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
2.1
2.2
2.3
2.4
2.5
LNP 11
LNP 10
LNP 01
LNP 00
Figure 17
OUTPUT−REFERRED NOISE vs V
CNTL
(VGA Hi Gain, R
S
=0Ω)
V
CNTL
(V)
Noise (nV/
√
Hz)
1000
100
10
0.2
0.3
0.4
0.5
0.6
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
2.1
2.2
2.3
2.4
2.5
LNP 11
LNP 10
LNP 00
LNP 01
Figure 18
1000
100
10
1
0.1
INPUT−REFERRED NOISE vs V
CNTL
(LNP and VGA, Lo VGA Gain, R
S
=0
Ω
)
V
CNTL
(V)
Noise (nV/
√
Hz)
0.2
0.3
0.4
0.5
0.6
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
2.1
2.2
2.3
2.4
2.5
LNP 11
LNP 10
LNP 00
LNP 01