LT6556_15 Datasheet, PDF (1/16 Pages) Linear Technology – 750MHz Gain of 1 Triple 2:1Video Multiplexer

LT6556
750MHz Gain of 1 Triple
2:1Video Multiplexer
FEATURES
■ _{750MHz –3dB Small Signal Bandwidth}
■ _{450MHz –3dB 2VP-P Large-Signal Bandwidth}
■ _{120MHz ±0.1dB Bandwidth}
■ _{High Slew Rate: 2100V/µs}
■ _{Fixed Gain of 1; No External Resistors Required}
■ _{72dB Channel Separation at 10MHz}
■ _{52dB Channel Separation at 100MHz}
■ _{–84dBc 2nd Harmonic Distortion at 10MHz, 2VP-P}
■ _{–87dBc 3rd Harmonic Distortion at 10MHz, 2VP-P}
■ _{Low Supply Current: 9.5mA per Amplifier}
■ _{6.5ns 0.1% Settling Time for 2V Step}
■ _{ISS ≤ 330µA 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 Buffers}
■ _{UXGA Video Multiplexing}
■ _{LCD Projectors}
DESCRIPTIO
The LT^®6556 is a high speed triple 2:1 video multiplexer
with an internally fixed gain of 1. The individual buffers
are optimized for performance with a 1k load and feature a
2V_P-P –3dB bandwidth of 450MHz, making them ideal for
driving very high resolution video signals. Separate power
supply pins for each amplifier boost channel separation
to 72dB, allowing the LT6556 to excel in many high speed
applications.
While the performance of the LT6556 is optimized for dual
supply operation, it can also be operated with a single sup-
ply as low as 4.5V. Using dual 5V supplies, each amplifier
draws only 9.5mA. When disabled, the amplifiers draw
less than 330µA and the outputs become high impedance.
For applications requiring a fixed gain of 2, refer to the
LT6555 datasheet.
The LT6556 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
LT6556
×1
75Ω
R_OUT
1k
75Ω ^AGND
×1
R_INB
G_INB
B_INB
75Ω
G_OUT
1k
75Ω
75Ω
V^–
×1
B_OUT
SELECT A/B
1k
V_REF
ENABLE
DGND
6556 TA01
Large-Signal Transient Response
1.5
V_IN = 2V_P-P
V_S = ±5V
1.0
R_L = 1k
T_A = 25°C
0.5
0
–0.5
–1.0
–1.5
0 2 4 6 8 10 12 14 16 18 20
TIME (ns)
6556 TA02
6556f
1