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THS4021 Datasheet(PDF) 11 Page - Texas Instruments

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Part # THS4021
Description  350-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS
PDF  29 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

THS4021 Datasheet(HTML) 11 Page - Texas Instruments

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NF
+ 10log 1 )
en
2
) IN+
R
S
2
4 kTR
S
0
2
4
6
8
10
12
14
16
Source Resistance −
Ω
10
100
1k
10k
G028
f = 10 kHz
TA = 25°C
THS4021
THS4022
SLOS265C – SEPTEMBER 1999 – REVISED JULY 2007
Because the dominant noise components are generally the source resistance and the internal amplifier noise
voltage, we can approximate noise figure as:
Figure 32 shows the noise figure graph for the THS402x.
NOISE FIGURE
vs
SOURCE RESISTANCE
Figure 32. Noise Figure vs Source Resistance
Copyright © 1999–2007, Texas Instruments Incorporated
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Product Folder Link(s): THS4021 THS4022



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