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THS6062_16 Datasheet, PDF (20/36 Pages) Texas Instruments – LOW-NOISE ADSL DUAL DIFFERENTIAL RECEIVER | |||
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THS6062
SLOS228D â JANUARY 1999 â REVISED OCTOBER 2007
www.ti.com
NF
+
10logȧȧȱȲÇeeRnsi Ç22
ȳ
ȧȧ
È´
(3)
Because the dominant noise components are generally the source resistance and the internal amplifier noise
voltage, we can approximate the noise figure as:
Ç Ç NF
+
ȱ
10logȧȧȧȧȧ1
ȧȡȢ
)
en
Ç 2
) IN )
4 kTRS
RSÇ2ȧȣȤȧȧȧȧȧȳ
Ȳ
È´
(4)
Figure 42 shows the noise figure graph for the THS6062.
NOISE FIGURE
vs
SOURCE RESISTANCE
16
f = 10 kHz
14 TA = 25°C
12
10
8
6
4
2
0
10
100
1k
10 k
Source Resistance â â¦
Figure 42. Noise Figure vs Source Resistance
20
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