LT6555_15 Datasheet, PDF (1/16 Pages) Linear Technology – 650MHz Gain of 2 Triple 2:1Video Multiplexer

FEATURES
■ _{650MHz –3dB Small Signal Bandwidth}
■ _{450MHz –3dB 2VP-P Large-Signal Bandwidth}
■ _{120MHz ±0.1dB Bandwidth}
■ _{High Slew Rate: 2200V/µs}
■ _{Fixed Gain of 2; No External Resistors Required}
■ _{72dB Channel Separation at 10MHz}
■ _{50dB Channel Separation at 100MHz}
■ _{–80dBc 2nd Harmonic Distortion at 10MHz, 2VP-P}
■ _{–70dBc 3rd Harmonic Distortion at 10MHz, 2VP-P}
■ _{Low Supply Current: 9mA per Amplifier}
■ _{6.5ns 0.1% Settling Time for 2V Step}
■ _{ISS ≤ 500µA per Amplifier when Disabled}
■ _{Differential Gain of 0.033%, Differential}
Phase of 0.022°
■ _{Wide Supply Range: ±2.25V (4.5V) to ±6V (12V)}
■ _{Available in 24-Lead SSOP and 24-Lead QFN}
Packages
U
APPLICATIO S
■ _{RGB Amplifiers}
■ _{UXGA Video Multiplexing}
■ _{LCD Projectors}
LT6555
650MHz Gain of 2 Triple
2:1Video Multiplexer
DESCRIPTIO
The LT^®6555 is a high speed triple 2:1 video multiplexer
with an internally fixed gain of 2. The individual amplifiers
are optimized for performance with a double terminated
75Ω video load and feature a –3dB 2V_P-P bandwidth of
450MHz, making them ideal for driving very high resolu-
tion video signals. Separate power supply pins for each
amplifier boost channel separation to 72dB, allowing the
LT6555 to excel in many high speed applications.
While the performance of the LT6555 is optimized for dual
supply operation, it can also be operated with a single
supply as low as 4.5V. Using dual 5V supplies, each
amplifier draws only 9mA. When disabled, the amplifiers
draw less than 500µA and the outputs become high
impedance.
The LT6555 is manufactured on Linear Technology’s
proprietary low voltage complementary bipolar process
and is available in 24-lead SSOP and ultra-compact
24-lead QFN packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
RGB Multiplexer and Line Driver
V⁺
R_INA
G_INA
75Ω
B_INA
LT6555
75Ω
×2
75Ω
R_OUT
75Ω
75Ω ^AGND
R_INB
G_INB
B_INB
75Ω
75Ω
75Ω
V^–
75Ω
×2
G_OUT
75Ω
75Ω
×2
SELECT A/B
ENABLE
DGND
B_OUT
75Ω
6555 TA01a
Video Amplitude Transient Response
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
0
V_IN = 0V TO 700mV
V_S = ±5V
R_L = 150Ω
T_A = 25°C
2 4 6 8 10 12 14 16 18 20
TIME (ns)
6555 G21
6555f
1