200MHz, Low Noise, Low Power Fully Differential Input/Output Amplifier/Driver

The LTC6403-1 is a precision, very low noise, low distortion, fully differential input/output amplifier optimized for 3V to 5V, single supply operation. The LTC6403-1 is unity gain stable. The LTC6403-1 closed-loop bandwidth extends from DC to 200MHz. In addition to the normal unfiltered outputs (+OUT and –OUT), the LTC6403-1 has a built-in 44.2MHz differential single-pole lowpass filter and an additional pair of filtered outputs (+OUTF, and –OUTF). An input referred voltage noise of 2.8nV/√Hz enables the LTC6403-1 to drive state-of-the-art 14- to 18-bit ADCs while operating on the same supply voltage, saving system cost and power. The LTC6403-1 maintains its performance for supplies as low as 2.7V. It draws only 10.8mA, and has a hardware shutdown feature which reduces current consumption to 170μA.

The LTC6403-1 is available in a compact 3mm × 3mm 16-pin leadless QFN package and operates over a –40°C to 125°C temperature range.

Applications

* Differential Input A/D Converter Driver

* Single-Ended to Differential Conversion/Amplification

* Common Mode Level Translation

* Low Voltage, Low Noise, Signal Processing

* Very Low Distortion: (2VP-P, 3MHz): –95dBc

* Fully Differential Input and Output

* Low Noise: 2.8nV/√Hz Input-Referred

* 200MHz Gain-Bandwidth Product

* Built-In Clamp: Fast Overdrive Recovery

* Slew Rate: 200V/μs

* Adjustable Output Common Mode Voltage

* Rail-to-Rail Output Swing

* Input Range Extends to Ground

* Large Output Current: 60mA (Typ)

* DC Voltage Offset <1.5mV (Max)

* 10.8mA Supply Current

* 2.7V to 5.25V Supply Voltage Range

* Low Power Shutdown

* Tiny 3mm × 3mm × 0.75mm 16-Pin QFN Package