Features

s

s

High output current: 60mA

s

High input impedance: 6M

Ω

s

Gains of +1, +2 with no external

components

s

Low power

s

Very low input bias currents: 100nA

s

Excellent gain accuracy: 0.1%

s

High speed: 120MHz -3dB BW

s

Low-cost

Applications

s

Desktop video systems

s

Video distribution

s

Flash A/D driver

s

High-speed line driver

s

High-source impedance applications

s

Professional video processing

s

High resolution monitors

General Description

The CLC417 is a dual, low-cost, high-speed (120MHz) buffer which

features user-programmable gains of +2, +1, and -1V/V. The

CLC417’s high 60mA output current, coupled with its ultra-low

39mW per channel power consumption makes it the ideal choice for

demanding applications that are sensitive to both power and cost.

Utilizing National’s proven architectures, this dual current feedback

amplifier surpasses the performance of alternate solutions with a

closed-loop design that produces new standards for buffers in gain

accuracy, input impedance, and input bias currents. The CLC417’s

internal feedback network provides an excellent gain accuracy of

0.1%. High source impedance applications will benefit from the

CLC417’s 6M

Ω input impedance along with its exceptionally low

100nA input bias current.

With exceptional gain flatness and low differential gain and phase

errors, the CLC417 is very useful for professional video processing

and distribution. A 120MHz -3dB bandwidth coupled with a 400V/

µs

slew rate also make the CLC417 a perfect choice in cost-sensitive

applications such as video monitors, fax machines, copiers, and

CATV systems.

Back-terminated video applications will be

enhanced by a gain of +2 configuration which requires no external

gain components reducing costs and board space.

Pinout

DIP & SOIC

-5V

0.1

µF

6.8

µF

+5V

0.1

µF

6.8

µF

CLC417

250

Ω

250

Ω

250

Ω

250

Ω

Typical Application

Differential Input/Differential Output Amplifier

CLC417

Dual Low-Power, Programmable Gain Buffer

September 1998

OUT1

-IN1

+IN1

OUT2

-IN2

+IN2

250

Ω

250

Ω

250

Ω

250

Ω

N

© 1998 National Semiconductor Corporation

http://www.national.com

Printed in the U.S.A.