CLC400
Fast Settling, Wideband Low Gain Monolithic Op Amp
General Description
Features
The CLC400 is a high speed, fast setting operational amplifier designed for low gain applications. Constructed using a
unique, proprietary design and an advanced complementary
bipolar process, the CLC400 offers performance far beyond
that normally offered by ordinary monolithic op amps. In
addition, unlike many other high speed op amps the CLC400
offers both high performance and stability without the need
for compensation circuitry — even at a gain of +1.
The fast 12ns settling to 0.05% and its ability to drive capacitive loads makes the CLC400 an ideal flash A/D driver. The
wide bandwidth of 200MHz and the very linear phase ensure
unsurpassed signal fidelity. Systems employing digital to
analog converters also benefit from the use of the CLC400
— especially if linearity and drive levels are important to
system performance.
The CLC400 provides a simple, high performance solution
for video distribution and line driving applications. The 50mA
output current and guaranteed specifications for 100Ω loads
provide ample drive capability and assured performance.
The CLC400 is based on National’s proprietary op amp
topology that uses current feedback instead of the usual
voltage feedback. This unique design has many advantages
over conventional designs (such as settling time that is
relatively independent of gain), yet it is used in basically the
same way (see the gain equations in Figure 1 and Figure 2).
However, an understanding of the topology will aid in achieving the best performance. The following discussion will proceed for the non-inverting gain configuration with the inverting mode analysis being very similar.
Enhanced Solutions (Military/Aerospace)
SMD Number: 5962-89970
Space level versions also available.
For more information, visit http://www.national.com/mil
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−3dB bandwidth of 200MHz
0.05% settling in 12ns
Low power, 150mW
Low distortion, −60dBc at 20MHz
Stable without compensation
Overload and short circuit protected
± 1 to ± 8 closed loop gain range
Applications
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Flash, precision A/D conversion
Video distribution
Line drivers
D/A current-to-voltage conversion
Photodiode, CCD preamps
IF processors
High speed communications
Pulse Response
01274309
Connection Diagram
01274319
Pinout
DIP & SOIC
© 2001 National Semiconductor Corporation
DS012743
www.national.com
CLC400 Fast Settling, Wideband Low Gain Monolithic Op Amp
May 2001
