LT6557

1

6557fa

500MHz, 2200V/µs Gain of 2,

Single Supply Triple Video

Amplifier with Input Bias Control

internal fixed gain of 2 and a programmable DC input bias

bandwidth, 2200V/µs slew rate and a unique ability to

drive heavy output loads to 0.8V of the supply rails, mak-

ing the LT6557 ideal for a single 5V supply, wideband video

application. With just one resistor, the inputs of all three

amplifiers can be programmed to a common voltage level,

simplifying and reducing the need for external circuitry in

the AC-coupled applications. Without the programmable

resistor, the input bias circuit becomes inactive, allowing the

use of an external clamp circuit or direct coupled input.

The LT6557 has separate power supply and ground pins for

each amplifier to improve channel separation and to ease

power supply bypassing. The LT6557 provides uncom-

promised performance in many high speed applications

where a low voltage, single supply is required.

The LT6557 is available in 16-lead SSOP and 5mm × 3mm

DFN packages.

■

LCD Video Projectors

■

RGB HD Video Amplifiers

■

Coaxial Cable Drivers

■

Low Supply ADC Drivers

■

–3dB Small-Signal Bandwidth: 500MHz

■

■

Slew Rate: 2200V/µs

■

Fixed Gain of 2, No External Resistors Required

■

AC Coupling with Programmable DC Input Bias

■

Output Swings to 0.8V of Supply Rails

■

Full Video Swing with 5V Single Supply

■

Diff Gain: 0.02%

■

Diff Phase: 0.05°

■

Enable/Shutdown Pin

■

High Output Current: ±100mA

■

Supply Range: 3V to 7.5V

■

Operating Temperature Range: –40°C to 85°C

■

Available in 16-Lead SSOP and 5mm × 3mm DFN

Packages

AC-Coupled Triple Video Driver

+

–

500

Ω

IN R

GND

EN

IN R

OUT R

BCV

LT6557

GND R

75

Ω

75

Ω

412

Ω

5V

5V

5V

5V

6557 TA01a

22

µF

500

Ω

75

Ω

220

µF

+

–

500

Ω

IN G

IN G

OUT G

GND G

75

Ω

75

Ω

22

µF

500

Ω

75

Ω

220

µF

+

–

500

Ω

IN B

IN B

OUT B

GND B

75

Ω

75

Ω

22

µF

500

Ω

75

Ω

220

µF

Fast Large-Signal Transient Response

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION