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CLC428

Dual Wideband, Low-Noise, Voltage Feedback Op Amp

General Description

The CLC428 is a very high-speed dual op amp that offers a traditional

voltage-feedback topology featuring unity-gain stability and slew-

enhanced circuitry. The CLC428’s ultra low noise and very low

harmonic distortion combine to form a very wide dynamic-range op

amp that operates from a single (5 to 12V) or dual (±5V) power supply.

Each of the CLC428’s closely matched channels provides a 160MHz

unity-gain bandwidth with an ultra low input voltage noise density

(2nV/

√Hz). Verylow2nd/3rdharmonicdistortion(-62/-72dBc)aswell

as high channel-to-channel isolation (-62dB) make the CLC428 a

perfect wide dynamic-range amplifier for matched I/Q channels.

With its fast and accurate settling (16ns to 0.1%), the CLC428 is also

a excellent choice for wide-dynamic range, anti-aliasing filters

to buffer the inputs of hi-resolution analog-to-digital converters.

Combining the CLC428’s two tightly-matched amplifiers in a single

eight-pin SOIC reduces cost and board space for many composite

amplifier applications such as active filters, differential line drivers/

receivers, fast peak detectors and instrumentation amplifiers.

To reduce design times and assist in board layout, the CLC428 is

supported by an evaluation board and a SPICE simulation model

available from National Semiconductor.

June 1999

Features

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Wide unity-gain bandwidth: 160MHz

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Ultra-low noise: 2.0nV/

√Hz

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Low distortion: -78dBc 2nd (2MHz)

-62/-72dBc (10MHz)

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Settling time: 16ns to 0.1%

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Supply voltage range: ±2.5 to ±5 or

single supply

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High output current: ±80mA

Applications

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General purpose dual op amp

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Low noise integrators

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Low noise active filters

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Diff-in/diff-out instrumentation amp

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Driver/receiver for transmission systems

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High-speed detectors

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I/Q channel amplifiers

Pinout

DIP & SOIC

1

2

3

4

8

7

6

5

-Vcc

-

+

-

+

Typical Application

5-Decade Integrator

© 1999 National Semiconductor Corporation

http://www.national.com

Printed in the U.S.A.