LT6557
500MHz, 2200V/µs Gain of 2,
Single Supply Triple Video
Amplifier with Input Bias Control
FEATURES
DESCRIPTION
The LT®6557 is a high speed triple video amplifier with an
internal fixed gain of 2 and a programmable DC input bias
■
–3dB Small-Signal Bandwidth: 500MHz
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–3dB 2V Large-Signal Bandwidth: 400MHz
P-P
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Slew Rate: 2200V/µs
voltage. This amplifier features a 400MHz 2V signal
P-P
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Fixed Gain of 2, No External Resistors Required
bandwidth, 2200V/µs slew rate and a unique ability to
drive heavy output loads to 0.8V of the supply rails, mak-
ingtheLT6557idealforasingle5Vsupply,widebandvideo
application. With just one resistor, the inputs of all three
amplifierscanbeprogrammedtoacommonvoltagelevel,
simplifying and reducing the need for external circuitry in
the AC-coupled applications. Without the programmable
resistor,theinputbiascircuitbecomesinactive,allowingthe
use of an external clamp circuit or direct coupled input.
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AC Coupling with Programmable DC Input Bias
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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
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■
■
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Operating Temperature Range: –40°C to 85°C
TheLT6557hasseparatepowersupplyandgroundpinsfor
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.
■
Available in 16-Lead SSOP and 5mm × 3mm DFN
Packages
APPLICATIONS
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LCD Video Projectors
The LT6557 is available in 16-lead SSOP and 5mm × 3mm
DFN packages.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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RGB HD Video Amplifiers
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Coaxial Cable Drivers
Low Supply ADC Drivers
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TYPICAL APPLICATION
AC-Coupled Triple Video Driver
BCV
EN
Fast Large-Signal Transient Response
LT6557
+
412Ω
75Ω
5V
220µF
V
GND
22µF
IN R
75Ω
IN R
IN G
IN B
+
–
OUT R
75Ω
500Ω
500Ω
500Ω
500Ω
500Ω
500Ω
GND R
+
5V
V
R
22µF
220µF
IN G
75Ω
+
–
OUT G
+
75Ω
75Ω
75Ω
GND G
5V
V
G
22µF
220µF
IN B
75Ω
+
–
OUT B
+
75Ω
GND B
5V
V
B
6557 TA01a
6557fa
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