LTC6421-20 Datasheet | Linear Technology

.. Features n n n n n n n n n n n n n n LTC6421-20 Dual Matched 1.3GHz Differential Amplifiers/ADC Drivers DESCRIPTION The LTC®6421-20 is a dual high speed differential amplifier targeted at processing signals from DC to 140MHz. The part has been specifically designed to drive 12-, 14- and 16-bit ADCs with low noise and low distortion, but can also be used as a general-purpose broadband gain block. The LTC6421-20 is easy to use, with minimal support circuitry required. The output mon mode voltage is set using an external pin, independent of the inputs, which eliminates the need for transformers or AC-coupling capacitors in many applications. The gain is internally fixed at 20d B (10V/ V). The LTC6421-20 saves space and power pared to alternative solutions using IF gain blocks and transformers. The LTC6421-20 is packaged in a pact 20-lead 3mm × 4mm QFN package and operates over the - 40°C to 85°C temperature range. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Matched Gain ±0.1d B Matched Phase ±0.2° at 100MHz Channel Separation 80d B at 100MHz 1.3GHz - 3d B Bandwidth; Fixed Gain of 10V/V (20d B) IMD3 = - 76d Bc at 100MHz, 2VP-P Equivalent OIP3 = 42d Bm at 100MHz 1n V/√Hz Internal Op Amp Noise 6.2d B Noise Figure Differential Inputs and Outputs Rail-to-Rail Output Swing 40m A Supply Current (120m W) per Amplifier 1V to 1.6V Output mon Mode Voltage, Adjustable DC- or AC-Coupled Operation 20-Lead 3mm × 4mm × 0.75mm QFN Package APPLICATIONS n n n n Differential ADC Driver Differential Driver/Receiver Single Ended to Differential Conversion IF Sampling (Diversity) Receivers TYPICAL APPLICATION Matched Dual Amplifiers with Output mon Mode Biasing 3V 1000p F 0.1μF VOCMA V+ A ZIN = 200Ω 0.1μF LTC6421-20 1000Ω - INA 100Ω 12.5Ω +OUTA VOCMA PERCENTAGE OF UNITS 35 30 25 20 15 10 5 0.1μF - INB 100Ω 1000Ω V+ B 1000p F 0.1μF VOCMB VOCMB ENABLEB 642120...