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AD8331ARQZ-R7 数据表(PDF) 15 Page - Analog Devices

部件名 AD8331ARQZ-R7
功能描述  Ultralow Noise VGAs with Preamplifier and Programmable RIN
PDF  56 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD8331ARQZ-R7 数据表(HTML) 15 Page - Analog Devices

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AD8331/AD8332/AD8334
Rev. G | Page 15 of 56
500
400
300
200
100
0
0
0.2
0.4
0.6
0.8
1.0
VGAIN (V)
HI GAIN
LO GAIN
AD8332
AD8334
AD8331
f = 10MHz
Figure 25. Output-Referred Noise vs. VGAIN
2.5
2.0
1.5
1.0
0.5
100k
1M
10M
100M
FREQUENCY (Hz)
RS = 0, RIZ = ∞, VGAIN = 1V,
HILO = LO OR HI
Figure 26. Short-Circuit, Input-Referred Noise vs. Frequency
100
10
1
0.1
0
0.2
0.4
0.6
0.8
1.0
VGAIN (V)
RS = 0, RIZ = ∞,
HILO = LO OR HI, f = 10MHz
Figure 27. Short-Circuit, Input-Referred Noise vs. VGAIN
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
–50
–30
–10
10
30
50
70
90
TEMPERATURE (°C)
RS = 0, RIZ = ∞,
VGAIN = 1V, f = 10MHz
Figure 28. Short-Circuit, Input-Referred Noise vs. Temperature
10
1
0.1
1
10
100
1k
SOURCE RESISTANCE (Ω)
f = 5MHz, RIZ = ∞,
VGAIN = 1V
RS THERMAL NOISE
ALONE
Figure 29. Input-Referred Noise vs. RS
7
6
5
4
3
2
1
0
50
100
1k
SOURCE RESISTANCE (Ω)
INCLUDES NOISE OF VGA
RIN = 50Ω
RIN = 75Ω
RIN = 100Ω
RIN = 200Ω
RIZ = ∞
SIMULATED RESULTS
Figure 30. Noise Figure vs. RS for Various Values of RIN



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