LTC6412 Datasheet | Linear Technology Corporation

.. LTC6412 800MHz, 31d B Range Analog-Controlled VGA DESCRIPTION The LTC®6412 is a fully differential variable gain amplifier with linear-in-d B analog gain control. It is designed for AC-coupled operation in IF receiver chains from 1MHz to 500MHz. The part has a constant OIP3 across a wide output amplitude range and across the 31d B gain control range. The output noise (NF + Gain) is also flat versus gain to provide a uniform spurious-free dynamic range (SFDR) >120d B over the full gain control range at 240MHz. The LTC6412 is ideal for interfacing with the LT®5527 and LT5557 downconverting mixers, LTC6410-6 IF amplifier and the LTC6400/LTC6401/LTC6416 ADC drivers for use in 12-, 14-, and 16-bit ADC applications. The LTC6412 recovers quickly from an overdrive condition, and the EN pin allows for a fast output signal disable to protect sensitive downstream ponents. Asserting the SHDN pin reduces the current consumption below 1m A for power-down or sleep modes. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Features n n n n n n n n n n n n 800MHz - 3d B Small-Signal Bandwidth Continuously-Adjustable Gain Control - 14d B to +17d B Linear-in-d B Gain Range 35d Bm OIP3 at 240MHz Across All Gain Settings 10d B Noise Figure at Maximum Gain (IIP3 - NF) = +8d Bm at 240MHz Across All Gains 2.7n V/√Hz Input Referred Noise Differential Inputs and Outputs 50Ω Input Impedance Across all Gains Single Supply Operation from 3V to 3.6V 110m A Supply Current 4mm × 4mm × 0.75mm 24-Pin QFN Package APPLICATIONS n n n n IF Signal Chain Automatic Gain Control (AGC) 2.5G and 3G Cellular Basestation Transceivers Wi MAX, Wi Bro, WLAN Receivers Satellite and GPS Receiver IF TYPICAL APPLICATION 3.3V Fully Differential 240MHz IF Receiver Chain with 31d B Gain Control 3.3V 3.3V 1n F VCC SHDN 10n F 0.1μF 180n H EN +OUT 0.1μF 180n H 3.3V BPF +IN V+ +OUT AIN+...