LMH6628

Dual Wideband, Low Noise, Voltage Feedback Op Amp

General Description

The National LMH6628 is a high speed dual op amp that

offers a traditional voltage feedback topology featuring unity

gain stability and slew enhanced circuitry. The LMH6628’s

low noise and very low harmonic distortion combine to form

a wide dynamic range op amp that operates from a single

Each of the LMH6628’s closely matched channels provides

a 300MHz unity gain bandwidth and low input voltage noise

density (2nV/

). Low 2nd/3rd harmonic distortion (−65/

−74dBc at 10MHz) make the LMH6628 a perfect wide dy-

namic range amplifier for matched I/Q channels.

With its fast and accurate settling (12ns to 0.1%), the

LMH6628 is also an excellent choice for wide dynamic

range, anti-aliasing filters to buffer the inputs of hi resolution

analog-to-digital converters. Combining the LMH6628’s two

tightly matched amplifiers in a single 8-pin SOIC package

reduces cost and board space for many composite amplifier

applications such as active filters, differential line drivers/

receivers, fast peak detectors and instrumentation amplifi-

ers.

plimentary bipolar process.

To reduce design times and assist in board layout, the

LMH6628

is

supported

by

an

evaluation

board

(CLC730036).

Features

n

Wide unity gain bandwidth: 300MHz

n

Low noise: 2nV/

n

Low Distortion: −65/−74dBc (10MHz)

n

Settling time: 12ns to 0.1%

n

n

n

Improved replacement for CLC428

Applications

n

High speed dual op amp

n

Low noise integrators

n

Low noise active filters

n

Driver/receiver for transmission systems

n

High speed detectors

n

I/Q channel amplifiers

Connection Diagram

8-Pin SOIC

20038535

Top View

Inverting Frequency Response

20038515

January 2003

© 2003 National Semiconductor Corporation

DS200385

www.national.com