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.

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

* Low Noise: 1.6nV/√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