750MHz Gain of 1 Triple 2:1Video Multiplexer

The LT6556 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 2VP-P -3dB bandwidth of 450MHz, making them ideal for driving very high resolution video signals. Separate power supply pins for each amplifi er 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 supply 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 fi xed gain of 2, refer to the LT6555 datasheet.

The LT6556 is available in 24-lead SSOP and ultra-compact 24-lead QFN packages.

Applications

* RGB Buffers

* UXGA Video Multiplexing

* LCD Projectors

* 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 Amplifi er

* 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