LT6557 Datasheet, PDF (1/12 Pages) Linear Technology – 500MHz, 2200V/μs Gain of 2, Single Supply Triple Video Amplifi er with Input Bias Control

LT6557
500MHz, 2200V/µs Gain of 2,
Single Supply Triple Video
Amplifier with Input Bias Control
FEATURES
DESCRIPTION
■ _{–3dB Small-Signal Bandwidth: 500MHz}
■ _{–3dB 2VP-P Large-Signal Bandwidth: 400MHz}
■ _{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
APPLICATIONS
■ _{LCD Video Projectors}
■ _{RGB HD Video Amplifiers}
■ _{Coaxial Cable Drivers}
■ _{Low Supply ADC Drivers}
The LT^®6557 is a high speed triple video amplifier with an
internal fixed gain of 2 and a programmable DC input bias
voltage. This amplifier features a 400MHz 2V_P-P signal
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.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
AC-Coupled Triple Video Driver
EN
GND
22µF
IN R
IN R
LT6557
+
BCV
V⁺
5V
220µF
OUT R ^75Ω
–
75Ω _{GND R} 500Ω
500Ω
V⁺ R
5V
22µF
IN G
IN G
+
220µF
OUT G ^75Ω
–
75Ω _{GND G} 500Ω
500Ω
V⁺ G
5V
22µF
IN B
IN B
+
220µF
OUT B ^75Ω
75Ω _{GND B} 500Ω
–
500Ω
V⁺ B
5V
6557 TA01a
412Ω
75Ω
75Ω
75Ω
Fast Large-Signal Transient Response
6557fa
1