clc449 National Semiconductor Corporation, clc449 Datasheet - Page 8

• Manufacturer Part Number: clc449
• Description: 1.1ghz Ultra-wideband Monolithic Op Amp
• Manufacturer: National Semiconductor Corporation

www.national.com
Typical Performance Characteristics
Reverse Isolation (S
Application Division
CLC449 Operation
CLC449 Extended Application Information
The following design and application topics will supply you
with:
Additional design applications are possible with the CLC449.
If you have application questions, call 1-800-272-9959 in the
U.S. to contact a technical staff member.
DC Gain (Non-inverting)
The non-inverting DC voltage gain for the configuration
shown in is:
The normalized gain plots in the Typical Performance
Characteristics section show different feedback resistors,
R
for obtaining the highest bandwidth with minimal peaking.
The resistor
non-inverting input.
For A
• A comprehensive set of design parameters and design
•
• A series of common applications that the CLC449
• A set of easy to use design guidelines for the CLC449.
f
, for different gains. These values of R
parameter adjustment techniques.
prediction
supports.
A set of formulas that support design parameter change
v
-100
5, calculate the recommended R
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
FIGURE 1. Non-Inverting Gain
t
in Figure 1 provides DC bias for the
100M
12
)
Frequency (Hz)
200M
300M
f
f
are recommended
400M
as follows:
DS012715-24
DS012715-25
500M
(Continued)
8
R
recommended R
Select R
Accuracy of DC gain is usually limited by the tolerance of R
and R
DC Gain (unity gain buffer)
Unity
current-feedback amplifier as long as the recommended
feedback resistor R
Parasitic capacitance at the inverting node may require a
slight increase of R
DC Gain (inverting)
The inverting DC voltage gain for the configuration shown in
Figure 2 is
f
) 340 − A
g
.
gain
g
to set the DC gain:
V
x R
buffers
FIGURE 2. Inverting Gain
f
i
is 100 .
where R
f
f
= 402
to maintain a flat frequency response.
are
i
= 45 . For A
is used and R
easily
designed
V
DS012715-28
>
g
5, the minimum
=
, i.e., open.
with
a
f