2.7GHz, 5V, Low Noise, Rail-to-Rail Input Differential Amplifier/Driver

The LTC6405 is a very low noise, low distortion, fully differential input/output amplifier optimized for 5V, single supply operation. The LTC6405 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 LTC6405 ideal for level shifting signals with a wide common mode range for driving 12-bit to 16-bit single supply, differential input ADCs.

A 2.7GHz gain-bandwidth product results in 65dB linearity for 50MHz input signals. The LTC6405 is unity gain stable and the closed-loop bandwidth extends from DC to 800MHz. The output voltage swing extends from near-ground to 4V, to be compatible with a wide range of ADC converter input requirements. The LTC6405 draws only 18mA, and has a hardware shutdown feature which reduces current consumption to 400μA.

The LTC6405 is available in a compact 3mm × 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 5V

* Low Distortion (HD2/HD3):

* –82dBc/–65dBc at 50MHz, 2VP-P

* –97dBc/–91dBc at 25MHz, 2VP-P

* Rail-to-Rail Differential Input

* 4.5V to 5.25V Supply Voltage Range

* Fully Differential Input and Output

* Adjustable Output Common Mode Voltage

* 800MHz –3dB Bandwidth with AV = 1

* Gain-Bandwidth Product: 2.7GHz

* Low Power Shutdown

* Available in 8-Lead MSOP and 16-Lead 3mm × 3mm × 0.75mm QFN Packages