LTC6420-20 Datasheet | Linear Technology

.. Features n n n n n n n n n n n n n n LTC6420-20 Dual Matched 1.8GHz Differential Amplifiers/ADC Drivers DESCRIPTION The LTC®6420-20 is a dual high-speed differential amplifier targeted at processing signals from DC to 300MHz. 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 LTC6420-20 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 LTC6420-20 saves space and power pared to alternative solutions using IF gain blocks and transformers. The LTC6420-20 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 ±0.1° at 100MHz Channel Separation 80d B at 100MHz 1.8GHz - 3d B Bandwidth; Fixed Gain of 10V/V (20d B) IMD3 = - 84d Bc at 100MHz, 2VP-P Equivalent OIP3 = 46d Bm at 100MHz 1n V/√Hz Internal Op Amp Noise 6.2d B Noise Figure Differential Inputs and Outputs Rail-to-Rail Output Swing 80m A Supply Current (240m W) per Amplifier 1.1V 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 Amplifier with Output mon Mode Biasing 0.1μF 3V 1000p F VOCM A V+ A VOCM A 1000Ω 100Ω ENABLEA UNITS (%) VOCM A +IN A 100Ω VOCM A ±0.1d B GAIN MATCHING ±0.1° PHASE MATCHING AT 100MHz 12.5Ω 40 35 30 25 20 15 10 5 0 - 0.25 - 0.15 - 0.05 0.05 0.15 0.25...