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LTC6406 - 3GHz, Low Noise, Rail-to-Rail Input Differential Amplifier/Driver

The LTC6406 is a very low noise, low distortion, fully differential input/output amplifier optimized for 3V, single supply operation. The LTC6406 input common mode range is rail-to-rail, while the output common mode voltage is independently adjustable by applying a voltage on the VOCM pin. This makes the LTC6406 ideal for level shifting signals with a wide common mode range for driving 12-bit to 16-bit single supply, differential input ADCs.

A 3GHz gain-bandwidth product results in 70dB linearity for 50MHz input signals. The LTC6406 is unity gain stable and the closed-loop bandwidth extends from DC to 800MHz. The output voltage swing extends from near-ground to 2V, to be compatible with a wide range of ADC converter input requirements. The LTC6406 draws only 18mA, and has a hardware shutdown feature which reduces current consumption to 300µA.

The LTC6406 is available in a compact 3mm x 3mm 16-pin leadless QFN package as well as an 8-lead MSOP package, and operates over a –40°C to 85°C temperature range.

Features Low Noise: 1.6nV/v√Hz RTI Low Power: 18mA at 3V Low Distortion (HD2/HD3):   –80dBc/–69dBc at 50MHz, 2VP-P   –104dBc/–90dBc at 20MHz, 2VP-P Rail-to-Rail Differential Input 2.7V to 3.5V Supply Voltage Range Fully Differential Input and Output Adjustable Output Common Mode Voltage 800MHz –3dB Bandwidth with AV = 1 Gain-Bandwidth Product: 3GHz Low Power Shutdown Available in 8-Lead MSOP and Tiny 16-Lead 3mm x 3mm x 0.75mm QFN Packages Typical Application

Applications Differential Input ADC Driver Single-Ended to Differential Conversion Level-Shifting Ground-Referenced Signals Level-Shifting VCC-Referenced Signals High-Linearity Direct Conversion Receivers Packaging

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