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參數(shù)資料
| 型號(hào)： | CLC5632 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Dual, High Output, Programmable Gain Buffer |
| 中文描述： | 雙路，高輸出，可編程增益緩沖器 |
| 文件頁(yè)數(shù)： | 16/19頁(yè) |
| 文件大小： | 352K |
| 代理商： | CLC5632 |
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Application Division
(Continued)
Differential Line Driver with Load Impedance Conver-
sion
The circuit shown in the
Typical Application
schematic on
the front page and in Figure 16 operates as a differential line
driver. The transformer converts the load impedance to a
value that best matches the CLC5632’s output capabilities.
The single-ended input signal is converted to a differential
signal by the CLC5632. The line’s characteristic impedance
is matched at both the input and the output. The schematic
shows Unshielded Twisted Pair for the transmission line;
other types of lines can also be driven.
Set up the CLC5632 as a difference amplifier:
Set the Channel 1 amplifier to a gain of +1V/V
Set the Channel 2 amplifier to a gain of 1V/V
Make the best use of the CLC5632’s output drive capability
as follows:
where R
is the transformed value of the load impedance,
V
is the output Voltage Range, and I
max
is the maximum
Output Current.
Match the line’s characteristic impedance:
R
R
Z
R
n
R
R
L
o
m
eq
L
eq
=
=
=
Select the transformer so that it loads the line with a value
very near Z
O
over frequency range. The output impedance
of the CLC5632 also affects the match. With an ideal trans-
former we obtain:
where Z
(5632)(j
ω
) is the output impedance of the CLC5632
and |Z
O
(5632)(j
ω
)|
<<
R
m
.
The load voltage and current will fall in the ranges:
The CLC5632’s high output drive current and low distortion
make it a good choice for this application.
Differential Input/Differential Output Amplifier
below illustrates a differential input/differential output con-
figuration. The bypass capacitors are the only external com-
ponents required.
1
7
6
8
5
3
4
2
1k
+
-
+
-
1k
1k
1k
0.1
μ
F
6.8
μ
F
+
V
in
5k
5k
0.1
μ
F
+5V
+5V
0.1
μ
F
V
o
10m of 75
Coaxial Cable
75
0.1
μ
F
75
CLC5632
NOTE:
Channel 2 not shown
DS015003-53
FIGURE 14. Single Supply Cable Driver
1
20ns/div
V
in
= 10MHz, 0.5V
pp
DS015003-54
FIGURE 15. Response After 10m of Cable
R
t2
V
in
R
t
R
m/2
R
m/2
R
L
Z
o
UTP
I
o
R
eq
1:n
V
d/2
1
7
6
8
5
3
4
2
1k
+
-
+
-
1k
1k
1k
CLC5632
-V
d/2
Note:
Supplies and bypassing not shown.
DS015003-55
FIGURE 16. Differential Line Driver with Load
Impedance Conversion
C
www.national.com
16
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CLC5632IM | Dual, High Output, Programmable Gain Buffer |
| CLC5632IMX | RF CONNECTOR; 50 OHM N MALE, CRIMP ATTACHMENT FOR RG59 & RG62; *WILL NOT MATE WITH 75 OHM N CONNECTORS* |
| CLC5632IN | Dual, High Output, Programmable Gain Buffer |
| CLC5633 | Triple, High Output, Programmable Gain Buffer |
| CLC5633IM | Triple, High Output, Programmable Gain Buffer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CLC56321MX | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CLC5632IM | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CLC5632IMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual, High Output, Programmable Gain Buffer |
| CLC5632IN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual, High Output, Programmable Gain Buffer |
| CLC5632M/N WAF | 制造商:Texas Instruments 功能描述: |
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