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CLC431/432

Dual Wideband Monolithic Op Amp with Disable

General Description

The CLC431 and CLC432 current-feedback amplifiers provide wide

bandwidths and high slew rates for applications where board density

and power are key considerations. These amplifiers provide DC-

coupled small signal bandwidths exceeding 92MHz while consuming

only 7mA per channel. Operating from ±15V supplies, the CLC431/

432’s enhanced slew rate circuitry delivers large-signal bandwidths

insensitive gains are made possible by virtue of the CLC431 and

CLC432’s current-feedback topology.

The large common-mode input range and fast settling time (70ns

to 0.05%) make these amplifiers well suited for CCD & data

telecommunication applications. The disable of the CLC431 can

accommodate ECL or TTL logic levels or a wide range of user

definable inputs. With its fast enable/disable time (0.2

µs/1µs) and

high channel isolation of 70dB at 10MHz, the CLC431 can easily be

configured as a 2:1 MUX. Many high performance video applications

requiring signal gain and/or switching will be satisfied with the

CLC431/432 due to their very low differential gain and phase errors

Quick 8ns rise and fall times on 10V pulses allow the CLC431/432 to

drive either twisted pair or coaxial transmission lines over long

distances.

The CLC431/432's combination of low input voltage noise, wide

common-mode input voltage range and large output voltage swings

make them especially well suited for wide dynamic range signal

processing applications.

June 1999

Features

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Wide bandwidth: 92MHz (A

s

Fast slew rate: 2000V/

µs

s

Fast disable: 1

µs to high-Z output

s

High channel isolation: 70dB at 10MHz

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Single or dual supplies: ±5V to ±16.5V

Applications

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Video signal multiplexing

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Twisted-pair differential driver

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CCD buffer & level shifting

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Discrete gain-select amplifier

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Transimpedance amplifier

© 1999 National Semiconductor Corporation

http://www.national.com

Printed in the U.S.A.

Channel 1 (Gain = 2)

Channel 2 (Gain = 5)

SELECT

½CLC431

½CLC431

50

Ω

50

Ω

50

Ω

50

Ω

50

Ω

50

Ω

500

Ω

500

Ω

500

Ω

125

Ω

Typical Application

Discrete Gain Select Amplifier

-

+

-

+

1

2

3

4

-Vcc

8

7

6

5

DIS1

DIS2

DIS1

DIS2

1

2

3

4

5

6

7

14

13

12

11

10

9

8

CLC432

CLC431

Pinout

PDIP & SOIC