LMH6718 datasheet(1/16 Pages) NSC

Teilenummer	LMH6718

Bauteilbeschribung	Dual, High Output, Programmable Gain Buffer

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Hersteller	NSC [National Semiconductor (TI)]

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LMH6718

Dual, High Output, Programmable Gain Buffer

General Description

The LMH6718 is a dual, low cost high speed (130MHz)

buffer which features user programmable gains of +2, +1,

and -1V/V. The LMH6718 also has a new output stage that

delivers high output drive current (200mA), but consumes

minimal quiescent supply current (2.6mA/Amp) from a ±5V

supply. Its current feedback architecture, fabricated in an

advanced complementary bipolar process, maintains consis-

tent performance over a wide range of signal levels, and has

a linear phase response up to one half of the -3dB frequency.

The LMH6718 offers 0.1dB gain flatness to 30MHz and

differential gain and phase errors of .04% and .03˚. These

features are ideal for professional and consumer video ap-

plications.

The LMH6718 offers superior dynamic performance with a

130MHz small-signal bandwidth, 600V/µs slew rate and

4.2ns rise/fall times (2V

STEP). The combination of low quies-

cent current, high output current drive, and high speed per-

formance makes the LMH6718 well suited for many battery

powered personal communication/computing systems. The

ability to drive low impedance, high capacitive loads, makes

the LMH6718 ideal for single ended cable applications. It

also drives low impedance loads with minimum distortion.

The LMH6718 will drive a 100

Ω load with only −84/−84dBc

second/third harmonic distortion (A

V = +2, VOUT =2VPP,f=

1MHz). 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 LMH6718 provides

excellent -88/-98dBc second/third harmonic distortion (A

V =

+2, V

OUT =2VPP, f = 1MHz, RL =1k

Ω) and fast settling time.

The LMH6718 is fabricated using National’s VIP10™ com-

plimentary bipolar process.

Features

n

200mA output current

n

.04%, .03˚ differential gain, phase

n

5.2mA supply current for 2 amplifiers

n

130MHz bandwidth (A

V = +2)

n

−88/−98dBc HD2/HD3 (1MHz)

n

16ns settling to 0.05%

n

600V/µs slew rate

n

Nominal supply range ±2.5V to ±6V

n

Improved replacement for CLC5632

Applications

n

Video line driver

n

Coaxial cable driver

n

Twisted pair driver

n

Transformer/coil driver

n

High capacitive load driver

n

Portable/battery powered applications

n

A/D driver

n

I/Q Channel Amplifier

Connection Diagram

8-Pin SOIC

20040116

Top View

Maximum Output Voltage vs. Load

Resistance

20040164

January 2003

DS200401

www.national.com

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