LTC6417IUDC#PBF

LTC6417IUDC#PBF is a differential unity gain buffer that can drive a 50 ohm load with extremely low noise and excellent linearity. It is well suited for driving high-speed 14- and 16bit pipeline ADCs with input signals from DC to beyond 600MHz. Differential input impedance is 18.5Kohm, allowing 1:4 and 1:8 transformers to be used at the input providing additional system gain in 50 ohm systems. With no external biasing or gain setting components and a flow-through pinout, the LTC6417 is very easy to use. It can be DC-coupled and has a common mode output offset of -60mV. The LTC6417 input pins are internally biased to provide an output common mode voltage that is set by the voltage on the VCM pin for AC-coupled applications. It features fast, adjustable output voltage clamping to help protect subsequent circuitry. Applications include differential ADC driver, CCD buffer, cable driver, and 50 ohm buffer.

• DC-coupled signal path, single supply voltage range from 4.75V to 5.25V
• Programmable high speed, fast recovery output clamping
• Input noise voltage density is 1.5nV/√Hz typical at (f = 100KHz, TA = 25°C)
• Input noise current density is 4.3pA/√Hz typical at (f = 100KHz, TA = 25°C)
• Differential output voltage swing is 4.28VP-P typical at (VOUTDIFF, VINDIFF = ±2.3V)
• Common mode rejection ratio is 91dB typical at (IN+ = IN– = 0.65V to 1.85V)
• Supply voltage range from 4.75V to 5.25V, supply current is 123mA typ at (TA = 25°C)
• Power supply rejection ratio is 72dB typical at (TA = 25°C. V+ = 5V)
• Shutdown current is 24mA typical at (VSHDN = 5V, TA = 25°C)
• Operating temperature range from -40°C to 105°C, 20-lead plastic QFN package

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