TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDDA = VDDB = VDDR = +5V, load resistance = 500Ω on each output to ground, MGS = 011, LNP = 22dB and fIN = 5MHz, unless otherwise noted.
The input to the preamp (LNP) is single-ended, and the output from the VCA is single-ended unless otherwise noted. This results in a 6dB reduction in signal
amplitude compared to differential operation.
INPUT-REFERRED NOISE vs RS
(LNP = 25dB)
INPUT-REFERRED NOISE vs VCACNTL
(LNP = 25dB)
10.0
24
22
20
18
16
14
12
10
8
RS = 50Ω
MGS = 111
1.0
MGS = 111
6
4
2
MGS = 011
0.1
0
1
10
100
1k
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VCACNTL (V)
RS (Ω)
NOISE FIGURE vs RS
(LNP = 25dB)
NOISE FIGURE vs VCACNTL
(LNP = 25dB)
9
8
7
6
5
4
3
2
1
0
30
28
26
24
22
20
18
16
14
12
10
8
MGS = 111
MGS = 111
6
4
2
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VCACNTL (V)
10
100
1k
RS (Ω)
DISTORTION vs FREQUENCY
MGS = 011
DISTORTION vs FREQUENCY
MGS = 000
2VPP DIFFERENTIAL
2VPP DIFFERENTIAL
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
VC = 0.2, H2
VC = 0.2, H3
VC = 0.2, H2
VC = 3.0, H2
VC = 0.2, H3
VC = 3.0, H3
VC = 3.0, H2
VC = 3.0, H3
100k
1M
10M
100k
1M
Frequency (Hz)
10M
Frequency (Hz)
VCA2616, VCA2611
6
SBOS234E
www.ti.com
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
