CLC5602IN National Semiconductor, CLC5602IN Datasheet - Page 15

• Manufacturer Part Number: CLC5602IN
• Description: IC AMP VIDEO DUAL HI OUT 8-DIP
• Manufacturer: National Semiconductor

Specifications of CLC5602IN

• Applications: Current Feedback
• Number Of Circuits: 2
• -3db Bandwidth: 135MHz
• Slew Rate: 300 V/µs
• Current - Supply: 1.6mA
• Current - Output / Channel: 130mA
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *CLC5602IN

Application Division
This example illustrates a lowpass filter with Q = 0.707 and
corner frequency f
achieve a maximally flat, Butterworth response. Figure 14
indicates the filter response.
V
in
0.1 F
-15
-21
For R
Gain K 1
Corner frequency
Q
Q
-3
-9
3
c
FIGURE 12. Lowpass Filter Topology
(3 K)
RC
1
5k
158
5k
R C
FIGURE 14. Lowpass Response
R C
1
FIGURE 13. Design Equations
R
1
2 2
1 1
1
R
1M
2
c
158
100pF
= 10MHz. A Q of 0.707 was chosen to
R
1.698k
2
R
R
R and C
C
g
f
Frequency (Hz)
2
R C
R C
1 2
2 1
10M
R
c
0.1 F
1
3
2
g
1
CLC5602
+
-
+5V
(Continued)
1/2
R R C C
C
8
4
(1 K)
1 2 1 2
2
0.1 F
1k
C
R
1
1
f
1
C
100M
R C
R C
DS015000-52
0.1 F
2 2
1 1
DS015000-53
DS015000-51
100
V
o
15
Differential Line Driver with Load Impedance Conver-
sion
The circuit shown in the Typical Application schematic on
the front page and in Figure 15 , operates as a differential line
driver. The transformer converts the load impedance to a
value that best matches the CLC5602’s output capabilities.
The single-ended input signal is converted to a differential
signal by the CLC5602. 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 CLC5602 as a difference amplifier:
Make the best use of the CLC5602’s output drive capability
as follows:
where R
V
Output Current.
Match the line’s characteristic impedance:
Select the transformer so that it loads the line with a value
very near Z
the CLC5602 also affects the match. With an ideal
transformer we obtain:
where Z
and |Z
The load voltage and current will fall in the ranges:
Return Loss
V
in
max
R
R
t1
g1
FIGURE 15. Differential Line Driver with Load
is the Output Voltage Range, and I
O(5602)
+
CLC5602
-
O(5602)
eq
1/2
R
g2
R
V
V
o
is the transformed value of the load impedance,
f1
in
d
over frequency range. The output impedance of
(j )|
V
d/2
R
(j ) is the output impedance of the CLC5602
t2
R
2
Impedance Conversion
m
20 log
<<
+
CLC5602
-
1/2
R
R
n
R
1
R
f2
L
m
R
eq
m
-V
.
R
10
R
d/2
Z
R
R
R
g1
f1
o
eq
eq
L
2 V
R
R
n
R
m/2
m/2
I
eq
2
max
max
2
1:n
Z
o 5602
R
R
Z
g2
f2
o
max
is the maximum
UTP
Z
j
o
www.national.com
,dB
DS015000-54
I
o
R
L
V
+
-
o