Features

s

s

2500V/

µs slew rate

s

s

6ns settling time to 0.2%

s

3rd order intercept, 30dBm @ 70MHz

s

Dual ±5V or single 10V supply

s

High output current: 90mA

s

2.5dB noise figure

Applications

s

High performance RGB video

s

RF/IF amplifier

s

Instrumentation

s

Medical electronics

s

Active filters

s

High-speed A/D driver

s

High-speed D/A buffer

Typical Application

120MSPS High-Speed Flash ADC Driver

Pinout

DIP & SOIC

General Description

The CLC449 is an ultra-high-speed monolithic op amp, with a typ-

ical -3dB bandwidth of 1.1GHz at a gain of +2. This wideband op

amp supports rise and fall times less than 1ns, settling time of 6ns

(to 0.2%) and slew rate of 2500V/

µs. The CLC449 achieves 2nd

harmonic distortion of -68dBc at 5MHz at a low supply current of

only 12mA. These performance advantages have been achieved

through improvements in National’s proven current feedback

topology combined with a high-speed complementary bipolar

process.

The DC to 1.2GHz bandwidth of the CLC449 is suitable for many IF

and RF applications as a versatile op amp building block for replace-

ment of AC coupled discrete designs. Operational amplifier

functions such as active filters, gain blocks, differentiation, addition,

subtraction and other signal conditioning functions take full

advantage of the CLC449’s unity-gain stable closed-loop

performance.

The CLC449 performance provides greater headroom for lower

frequency applications such as component video, high-resolution

workstation graphics, and LCD displays. The amplifier’s 0.1dB

gain flatness to beyond 200MHz, plus 0.8ns 2V rise and fall times

are

ideal

for

improved

time

domain

performance.

In

addition, the 0.03%/0.02° differential gain/phase performance

allows system flexibility for handling standard NTSC and PAL

signals.

In applications using high-speed flash A/D and D/A converters, the

CLC449 provides the necessary wide bandwidth (1.1GHz), settling

(6ns to 0.2%) and low distortion into 50

Ω loads to improve SFDR.

CLC449

1.1GHz Ultra-Wideband Monolithic Op Amp

N

June 1999

© 1999 National Semiconductor Corporation

http://www.national.com

Printed in the U.S.A.