參數(shù)資料
型號(hào)： CLC405
廠商： National Semiconductor Corporation
英文描述： Low-Cost, Low-Power, 110MHz Op Amp with Disable
中文描述： 低成本，低功耗，110MHz的運(yùn)算放大器具有禁用
文件頁數(shù)： 6/6頁
文件大?。?/td> 299K
代理商： CLC405
Amplitude Equalization
Sending signals over coaxial cable greater than 50
meters in length will attenuate high frequency signal
components. Equalizers restore the attenuated com-
ponents of this signal. The circuit in Figure 4, is an op
amp equalizer.The RC networks peak the response of
the CLC405 at higher frequencies.
restores cable-attenuated frequencies. Graph 2 shows
how the equalizer actually restored a digital word
through 150 meters of coaxial cable.
This peaking
Figure 4
Graph 2
Amplitude Equalizer
Place the first zero (fz
1
) at some low frequency (540
khz for Graph 2).
R
1
& C
1
produce a pole (fp
1
@
750khz) that cancels fz
1
. Place a second zero at a
higher frequency (fz
2
@ 12Mhz). R
2
& C
2
provide a
canceling pole (of fp
2
= 25Mhz).
Graph 3 shows the closed loop response of the op
amp equalizer with equations for the poles, zeros,
and gains.
Closed Loop Equalizer Frequency Response
Graph 3
Note: For very-high frequency equalization, use a higher
bandwidth part (i.e. CLC44X)
Package Thermal Resistance
Ordering Information
Model
Temperature Range
Description
CLC405AJP
CLC405AJE
CLC405AIB
CLC405ALC
CLC405AMC
CLC405A8B
-40
C to +85
C
-40
C to +85
C
-40
C to +85
C
-40
C to +85
C
-55
C to +125
C
-55
C to +125
C
8-pin PDIP
8-pin SOIC
8-pin CerDIP
dice
dice, MIL-STD-883
8-pin CerDIP, MIL-STD-883
Contact factory for other packages and DESC SMD number.
Package
θ
jc
75
/W
130
/W
65
/W
θ
jA
125
/W
150
/W
155
/W
Plastic (AJP)
Surface Mount (AJE)
CerDip
R
f
= 348
+
CLC405
-
R
g
Input
R
t
Output
C
1
R
1
C
2
R
2
RC Networks
Coaxial Cable
Digital Word Amplitude Equalization
A
Time (200ns/div)
Unequalized
Equalized
L
Frequency (Hz)
fz
1
2R C
1
2 R C
R C
g
1
1
1
1
=
+
(
)
π
fp
1
1
1
=
fz
1
2R C
R C
1
2 R C
2
2
2
2
=
+
(
)
π
fp
2
2
2
=
R
RllR
eq
g
=
fz
1
fp
1
fz
2
fp
1
G
1
G
2
G
20log (1
R
R
2R
1
g
1
=
+
G
20log (1
)
2
eq
2
=
+
The values used to produce Graph 2 are:
R
g
= 348
C
1
= 470pF
R
1
= 450
R
2
= 90
C
2
= 70pF
http://www.national.com
6
C
L
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or fax
1-800-737-7018
.
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the president of National Semiconductor Corporation. As used herein:
1. Life support devices or systems are devices or systems which, a) are intended for surgical implant into the body, or b) support or
sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury to the user.
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cause the failure of the life support device or system, or to affect its safety or effectiveness.
N
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Corporation
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Arlington, TX 76017
Tel: 1(800) 272-9959
Fax: 1(800) 737-7018
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Tel: 81-043-299-2309
Fax: 81-043-299-2408
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said
circuitry and specifications.
相關(guān)PDF資料
PDF描述
CLC406AJP Circular Connector; No. of Contacts:41; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:20; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:20-41 RoHS Compliant: No
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