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AD8331 датащи(PDF) 10 Page - Analog Devices

номер детали AD8331
подробное описание детали  Ultralow Noise VGAs with Preamplifier and Programmable RIN
PDF  32 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD8331 датащи(HTML) 10 Page - Analog Devices

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AD8331/AD8332
Rev. C | Page 10 of 32
500
0
0.4
VGAIN (V)
1.0
0.6
300
0
100
400
200
0.2
0.8
HILO = HI
f = 10MHz
HILO = LO
Figure 21. Output-Referred Noise vs. VGAIN
1M
10M
0
100M
100k
FREQUENCY (Hz)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
RS = 0, RFB = ∞, VGAIN = 1V
HILO = LO OR HI
Figure 22. Short-Circuit Input-Referred Noise vs. Frequency
1
0
0.4
VGAIN (V)
1.0
0.6
0.1
100
10
0.2
0.8
RS = 0, RFB = ∞,
HILO = LO OR HI, f = 10MHz
Figure 23. Short-Circuit Input-Referred Noise vs. VGAIN
90
TEMPERATURE (
°C)
10
–30
–50
–10
70
50
30
0.50
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
RS = 0, RFB = ∞,
VGAIN = 1V, f = 10MHz
Figure 24. Short-Circuit Input-Referred Noise vs. Temperature
110
1.0
0.1
100
1k
SOURCE RESISTANCE (
Ω)
10
RS = THERMAL NOISE ALONE
f = 5MHz, RFB = ∞, VGAIN = 1V
Figure 25. Input-Referred Noise vs. RS
5
6
7
4
2
1
3
0
100
50
1k
75
Ω
200
Ω
SOURCE RESISTANCE (
Ω)
RIN = 50Ω
RFB = ∞
INCLUDES NOISE OF VGA
SIMULATION
100
Ω
Figure 26. Noise Figure vs. RS for Various Values of RIN



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