LT6558
1
6558f
550MHz, 2200V/µs Gain of 1,
Single Supply Triple Video
Amplifi er with Input Bias Control
The LT
®
6558 is a high speed triple video amplifi er with an
internal fi xed gain of 1 and a programmable DC input bias
voltage. This amplifi er 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 amplifi ers
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 amplifi er 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.
■
LCD Video Projectors
■
RGB HD Video Amplifi ers
■
Coaxial Cable Drivers
■
Low Supply ADC Drivers
■
–3dB Small-Signal Bandwidth: 550MHz
■
–3dB 2V
P-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
AC-Coupled Triple Video Driver
+
–
IN R
GND
EN
IN R
OUT R
V
+
V
+
R
V
+
G
V
+
B
BCV
LT6558
R
L
*
158Ω
*50Ω OR GREATER FOR R
L
5V
5V
5V
5V
6558 TA01a
22µF
220µF
+
–
IN G
IN G
OUT G
R
L
*
22µF
220µF
+
–
IN B
IN B
OUT B
R
L
*
22µF
220µF
GND R
GND G
GND B
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.
TIME (ns)
–10
OUTPUT (V)
3
4
5
6558 TA01b
2
1
0
–8–6–4–20246810
V
S
= 5V
V
IN
= 2V
P-P
R
L
= 150Ω
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION