TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25°C, V
DDA
= V
DDB
= V
DDR
= +5V, load resistance = 500Ω on each output to ground, MGS = 011, LNP = 22dB and f
IN
= 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.
GAIN vs FREQUENCY
GAIN vs FREQUENCY
VCA
(Pre-Amp)
(VCA
CNTL
= 0.2V)
30
5.0
LNA = 25dB
LNA = 22dB
4.0
25
3.0
20
2.0
Gain (dB)
1.0
0.0
–1.0
–2.0
–3.0
LNA = 5dB
0
100k
1M
Frequency (Hz)
10M
100M
–4.0
–5.0
100k
MGS = 000
MGS = 011
MGS = 111
MGS = 100
Gain (dB)
15
LNA = 17dB
10
5
1M
Frequency (Hz)
10M
100M
45
40
35
30
GAIN vs FREQUENCY
VCA
(VCA
CNTL
= 3.0V)
MGS = 111
GAIN vs FREQUENCY
LNA and VCA
(VCA
CNTL
= 3.0V)
60
50
LNP = 25dB
LNP = 22dB
MGS = 100
40
MGS = 011
Gain (dB)
25
20
15
10
5
0
100k
1M
Frequency (Hz)
10M
100M
MGS = 000
Gain (dB)
LNP = 17dB
30
LNP = 5dB
20
10
0
100k
1M
Frequency (Hz)
10M
100M
GAIN vs FREQUENCY
LNA and VCA
(LNP = 22dB)
60
V
CNTL
= 3.0V
50
2000
1800
1600
OUTPUT-REFERRED NOISE vs VCA
CNTL
(LNP = 25dB)
R
S
= 50Ω
Noise (nV/√Hz)
40
Gain (dB)
30
20
10
V
CNTL
= 1.6V
1400
1200
1000
800
600
400
MGS = 111
V
CNTL
= 0.2V
0
100k
1M
Frequency (Hz)
10M
100M
200
0
MGS = 011
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
VCA
CNTL
(V)
VCA2616, VCA2611
SBOS234E
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TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
