CLC446A8B NSC [National Semiconductor], CLC446A8B Datasheet

no-image

CLC446A8B

Manufacturer Part Number
CLC446A8B
Description
400MHz, 50mW Current-Feedback Op Amp
Manufacturer
NSC [National Semiconductor]
Datasheet
1.CLC446A8B.pdf (12 pages)
N
CLC446
400MHz, 50mW Current-Feedback Op Amp
© 1998 National Semiconductor Corporation
Printed in the U.S.A.
General Description
The National CLC446 is a very high-speed unity-gain-stable cur-
rent-feedback op amp that is designed to deliver the highest lev-
els of performance from a mere 50mW quiescent power. It pro-
vides a very wide 400MHz bandwidth, a 2000V/ s slew rate and
900ps rise/fall times. The CLC446 achieves its superior speed-
vs-power using an advanced complementary bipolar IC process
and National’s current-feedback architecture.
The CLC446 is designed to drive video loads with very low
differential gain and phase errors (0.02%, 0.03°). Combined with
its very low power (50mW), the CLC446 makes an excellent
choice for NTSC/PAL video switchers and routers. With its very
quick edge rates (900ps) and high slew rate (2000V/ s), the
CLC446 also makes an excellent choice for high-speed, high-
resolution component RGB video systems.
The CLC446 makes an excellent low-power high-resolution A/D
converter driver with its very fast 9ns settling time (to 0.1%) and
low harmonic distortion.
The combination of high performance and low power make
the CLC446 useful in many high-speed general purpose
applications. Its current-feedback architecture maintains consistent
performance over a wide gain range and signal levels. DC gain
and bandwidth can be set independently. Also, either maximally
flat AC response or linear phase response can be emphasized.
V
in
R
C
1
3
R
3
Elliptic-Function Low Pass Filter
R
C
2
4
Typical Application
C
2
R
C
4
1
R
g
+
CLC446
-
R
f
R
5
C
5
Features
Applications
V
-2
8
4
2
0
o
6
400MHz bandwidth (A
5mA supply current
0.02%, 0.03° differential gain, phase
2000V/ s slew rate
9ns settling to 0.1%
0.05dB gain flatness to 100MHz
-65/-78dBc HD2/HD3
High resolution video
A/D driver
Medical imaging
Video switchers & routers
RF/IF amplifier
Communications
Instrumentation
1M
Non-Inverting
Frequency Response (A
V
o
= 0.5V
V
pp
EE
10M
Frequency (Hz)
DIP & SOIC
Pinout
v
100M
v
= +2)
= +2)
November 1998
http://www.national.com
1G
V
CC

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CLC446A8B Summary of contents

Page 1

N CLC446 400MHz, 50mW Current-Feedback Op Amp General Description The National CLC446 is a very high-speed unity-gain-stable cur- rent-feedback op amp that is designed to deliver the highest lev- els of performance from a mere 50mW quiescent power. It pro- ...

Page 2

... Model ±48mA CLC446AJP ±Vcc CLC446AJE +175 ˚ C CLC446ALC CLC446A8B -65 ˚ +150 ˚ C CLC446AMC +300 ˚ C Contact the factory for other packages and DESC SMD number. 1000V Package Thermal Resistance Package Plastic (AJP) Surface Mount (AJE) Ceramic (A8B) Transistor Count ...

Page 3

Typical Performance Characteristics Non-Inverting Frequency Response 453 249 10V 200 -180 f -270 A ...

Page 4

Typical Performance Characteristics Short Term Settling Time 0.2 0.1 0 -0.1 -0.2 1n 10n The CLC446 has a current-feedback architecture built in an advanced complementary bipolar process. The key features of current-feedback are: AC bandwidth is independent of voltage gain ...

Page 5

DC Gain (unity gain buffer) The recommended R for unity gain buffers is 453 . left open. Parasitic capacitance at the inverting node may require a slight increase of R frequency response. DC Gain (inverting) The inverting ...

Page 6

Design (DC offsets) The DC offset model shown in Figure 6 is used to calculate the output offset voltage. The equation for out- put ...

Page 7

Using a resistor in series with a reactive load will also reduce the load’s effect on amplifier loop dynamics. For instance, driving coaxial cables without an output series resistor may cause peaking or oscillation. Transmission Line Matching One method for ...

Page 8

The CLC446 noise model in Figure 9 is used to develop this equation for NF 10log where the source ...

Page 9

D and D 1 from the input of the CLC522 to ground CLC446 500 D 250 ...

Page 10

Figure 12 shows the ideal response of this filter. Some methods to bring actual performance closer to this ideal are: Compensate for op amp delay effects (pre-distortion) Adjust for parasitic capacitances in the layout Use components with small tolerances Add ...

Page 11

This page intentionally left blank. 11 http://www.national.com ...

Page 12

Customer Design Applications Support National Semiconductor is committed to design excellence. For sales, literature and technical support, call the National Semiconductor Customer Response Group at 1-800-272-9959 or fax 1-800-737-7018. Life Support Policy National’s products are not authorized for use as ...

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