VCA2613 Datasheet, PDF (4/16 Pages) Burr-Brown (TI) – Dual, VARIABLE GAIN AMPLIFIER with Low-Noise Preamp

TYPICAL PERFORMANCE CURVES
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 VCA_CNTL
65
MGS = 111
60
MGS = 110
55
MGS = 101
50
45
MGS = 100
40
35
MGS = 011
30
MGS = 010
25
MGS = 001
20
MGS = 000
15
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)
2000
OUTPUT REFERRED NOISE vs VCA_CNTL
1800
1600
R_S = 50Ω
1400
1200
1000
800
MGS = 111
600
400
200
MGS = 011
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
VCA_CNTL (V)
INPUT REFERRED NOISE vs VCA_CNTL
20
18
R_S = 50Ω
16
14
12
10
MGS = 111
8
6
4
MGS = 011
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
VCA_CNTL (V)
INPUT REFERRED NOISE vs R_S
10.0
1.0
0.1
1
10
100
R_S (Ω)
1000
NOISE FIGURE vs R_S
9
8
7
6
5
4
3
2
1
0
10
100
R_S (Ω)
1000
NOISE FIGURE vs VCA_CNTL
20
18
16
14
12
10
8
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
VCA_CNTL (V)
4
VCA2613
www.ti.com
SBOS179D