LT6558_15 Datasheet, PDF (1/12 Pages) Linear Technology – Single Supply Triple Video Amplifi er with Input Bias Control

LT6558
550MHz, 2200V/µs Gain of 1,
Single Supply Triple Video
Amplifier with Input Bias Control
FEATURES
DESCRIPTION
■ _{–3dB Small-Signal Bandwidth: 550MHz}
■ _{–3dB 2VP-P Large-Signal Bandwidth: 400MHz}
■ _{Slew Rate: 2200V/µs}
■ _{Fixed Gain of 1, 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}
■ _{Differential Gain: 0.02%}
■ _{Differential Phase: 0.02°}
■ _{Enable/Shutdown Pin}
■ _{High Output Current: ±90mA}
■ _{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^®6558 is a high speed triple video amplifier with an
internal fixed gain of 1 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, making the
LT6558 ideal for a single 5V supply, wideband video applica-
tion. 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 AC-coupled
applications. Without the programming resistor, the input
bias circuit becomes inactive, allowing the use of an external
clamp circuit or direct coupled input.
The LT6558 has separate power supply and ground pins for
each amplifier to improve channel separation and to ease
power supply bypassing. The LT6558 provides uncom-
promised performance in many high speed applications
where a low voltage, single supply is required.
The LT6558 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
GND R
22µF
IN G
IN G
GND G
22µF
IN B
IN B
GND B
LT6558
+
–
+
–
+
–
BCV
V⁺
OUT R
V⁺ R
5V
220µF
5V
158Ω
R_L*
OUT G
220µF
V⁺ G
5V
R_L*
OUT B
220µF
V⁺ B
5V
6558 TA01a
R_L*
*50Ω OR GREATER FOR R_L
Fast Large-Signal Transient Response
5
V_S = 5V
V_IN = 2V_P-P
4 ^{RL = 150Ω}
3
2
1
0
–10 –8 –6 –4 –2 0 2 4 6 8 10
TIME (ns)
6558 TA01b
6558f
1