1FEATURES

23• Wideband operation

– A V = +1, VO = 0.5 VPP 650 MHz

– AV = +2, VO = 0.5 VPP 450 MHz

– AV = +2, VO = 2 VPP 400 MHz

• High output current ±90 mA

• Very low distortion

– 2nd/3rd harmonics (10 MHz, RL = 100Ω):

−62/−78dBc

– Differential gain/Differential phase:

0.02%/0.02°

• Low noise 2.3nV/√Hz

• High slew rate 3000 V/μs

• Supply current 11.5 mA

APPLICATIONS

• HDTV, NTSC and PAL video systems

• Video switching and distribution

• ADC driver

• DAC buffer

• RGB driver

• High speed multiplexer

DESCRIPTION

The LMH™6704 is a very wideband, DC coupled

selectable gain buffer designed specifically for wide

dynamic range systems requiring exceptional signal

fidelity. The LMH6704 includes on chip feedback and

gain set resistors, simplifying PCB layout while

providing user selectable gains of +1, +2 and −1 V/V.

The LMH6704 provides a disable pin, which places

the amplifier in a high output impedance, low power

mode. The Disable pin may be allowed to float high.

With a 650 MHz Small Signal Bandwidth (AV = +1),

full power gain flatness to 200 MHz, and excellent

Differential Gain and Phase, the LMH6704 is

optimized for video applications. High resolution video

systems will benefit from the LMH6704 ability to drive

multiple video loads at low levels of differential gain

or differential phase distortion.

The LMH6704 is constructed with proprietary high

speed complementary bipolar process using proven

current feedback circuit architectures. It is available in

8 Pin SOIC and 6 Pin SOT-23 packages.