Features

s

100mA output current

s

1.5mA supply current

s

s

-66/-75dBc HD2/HD3 (1MHz)

s

25ns settling to 0.05%

s

260V/

µs slew rate

s

Stable for capacitive loads up to 1000pF

s

Single 5V to ±5V supplies

s

Available in Tiny SOT23-5 package

Applications

s

Coaxial cable driver

s

Twisted pair driver

s

Transformer/Coil Driver

s

High capacitive load driver

s

Video line driver

s

Portable/battery-powered applications

s

A/D driver

1k

Ω

1k

Ω

0.1

µF

6.8

µF

5k

Ω

5k

Ω

+

+5V

+5V

1

CLC451

7

6

8

5

3

4

2

1k

Ω

1k

Ω

0.1

µF 0.1µF

10m of 75

Ω

Coaxial Cable

75

Ω

0.1

µF

75

Ω

Typical Application

Single Supply Cable Driver

Pinout

DIP & SOIC

General Description

The CLC451 is a low cost, high speed (85MHz) buffer that

features user-programmable gains of +2, +1, and -1V/V. It has a

new output stage that delivers high output drive current (100mA),

but consumes minimal quiescent supply current (1.5mA) from a

single 5V supply. Its current feedback architecture, fabricated in

an advanced complementary bipolar process, maintains consis-

tent performance over a programmable range of gains and wide

signal levels, and has a linear-phase response up to one half of

the -3dB frequency. The CLC451’s internal feedback network

provides an excellent gain accuracy of 0.3%

The CLC451 offers superior dynamic performance with a 85MHz

small-signal bandwidth, 260V/

µs slew rate and 6.5ns rise/fall

low quiescent power, high output current drive, and high-speed

performance make the CLC451 well suited for many battery-

powered personal communication/computing systems.

The ability to drive low-impedance, highly capacitive loads,

makes the CLC451 ideal for single ended cable applications. It

also drives low impedance loads with minimum distortion. The

CLC451 will drive a 100

Ω load with only -78/-65dBc second/third

load, and the same conditions, it produces only -55/-60dBc sec-

ond/third harmonic distortion. It is also optimized for driving high

currents into single-ended transformers and coils.

When driving the input of high-resolution A/D converters, the

CLC451 provides excellent -66/-75dBc second/third harmonic

settling time.

Ω)

1

2

3

4

5

6

7

8

9

10

10

100

1000

CLC451

Single Supply, Low-Power, High Output,

Programmable Buffer

N

June 1999

Response After 10m of Cable

20ns/div

1k

Ω

1k

Ω

+-

Pinout

SOT23-5

© 1999 National Semiconductor Corporation

http://www.national.com

Printed in the U.S.A.