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參數(shù)資料
| 型號(hào)： | CLC449AMC |
| 廠商： | COMLINEAR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.1GHz Ultra-Wideband Monolithic Op Amp |
| 中文描述： | VIDEO AMPLIFIER, UUC5 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 763K |
| 代理商： | CLC449AMC |
7
http://www.national.com
A
2-Tone, 3rd Order IMD Intercept
plot is found in the
Typical Performance Characteristics
section. The
output power level is taken at the load.
harmonic distortion is calculated with the formula:
Third-order
HD3
rd
= 2
(IP3
o
– P
o
)
where:
IP3
o
= third-order output intercept, dBm at
the load.
P
o
= output power level, dBm at the load.
HD3
rd
= third-order distortion from the
fundamental, -dBc.
dBm is the power in mW, at the load,
expressed in dB.
Realized third-order output distortion is highly
dependent upon the external circuit.
common external circuit choices that improve 3
rd
order
distortion are:
short and equal return paths from the load
to the supplies.
de-coupling capacitors of the correct value.
higher load resistance.
a lower ratio of the output swing to the power
supply voltage.
Some of the
Dynamic Range (Noise)
In RF applications, noise is frequently specified as Noise
Figure (NF). Figure 7 plots NF for the CLC449 at a gain
of 10, with a feedback resistor R
f
of 100
, and with no
input matching resistor.
The minimum Noise Figure
(2.5dB) for these conditions occurs when the source
resistance equals 700
.
Figure 7. Noise Figure Plot
Figure 8: CLC449 Noise Model
The CLC449 noise model in Figure 8 is used to develop
the equation below.
The equation for Noise Figure (NF) is:
where:
R
s
is the source resistance at the non-
inverting input.
There is no matching resistor from the input
to ground.
e
ni
, i
bn
, i
bi
are the voltage and current noise
density terms (see in the
Distortion and
Noise Response
sub-section of the
Electrical
Characteristics
section).
4kT = 16 x 10
-21
J, T = 290°K.
R
f
is the feedback resistor and R
g
is the gain
setting resistor.
Printed Circuit Board Layout and Measurement
High Frequency op amp performance is strongly depen-
dent on proper layout, proper resistive termination and
adequate power supply decoupling. The most important
layout points to follow are:
Use a ground plane.
Bypass power supply pins with monolithic
capacitors of about 0.1
μ
F value and place
the capacitors less than 0.1” (3mm) from the pin.
Bypass power supply pins with 6.8
μ
F tantalum
capacitors for large signal current swings or
improved power supply noise rejection.
Minimize trace and lead lengths for components
between the inverting and output pins.
Remove
ground
plane
amplifier package and within 0.1” (3mm) of all
input/output pads.
If parts must be socketed, always use
flush-mount socket pins instead of high profile
sockets.
underneath
the
Evaluation boards are available for proto-typing and mea-
surements.
Additional
available in the evaluation board literature.
layout
information
is
+
CLC449
-
e
n
*
V
o
R
s
i
bn
+
V
s
R
f
R
g
*
i
bi
*
NF
10LOG
e
i R
4 TR
k
i
R ||R
4 T R ||R
k
4 TR
k
ni
2
s
bi
g
2
g
s
2
=
+
(
)
+
+
(
)
+
N
Source Resistance (
)
20
15
0
10
100
10000
10
5
1000
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CLC449 | 1.1GHz Ultra-Wideband Monolithic Op Amp |
| CLC449AJE | IC-SM-1.2GHZ W/BND.OP-AMP |
| CLC450 | Single Supply, Low-Power, High Output, Current Feedback Amplifier |
| CLC450AJ | Single Supply, Low-Power, High Output, Current Feedback Amplifier |
| CLC451 | Single Supply, Low-Power, High Output, Programmable Buffer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CLC449M WAF | 制造商:Texas Instruments 功能描述: |
| CLC449N WAF | 制造商:Texas Instruments 功能描述: |
| CLC449SMD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Feedback Operational Amplifier |
| CLC450 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Single Supply, Low-Power, High Output, Current Feedback Amplifier |
| CLC450AJ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Single Supply, Low-Power, High Output, Current Feedback Amplifier |
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