ADI LTC5585IUF#PBF

Демодулятор400 МГц ~ 4 ГГц400 МГц ~ 4 ГГц

Overview

The LTC5585IUF is a direct conversion quadrature demodulator optimized for high linearity receiver applications in the 400MHz to 4GHz frequency range. It is suitable for communications receivers where an RF signal is directly converted into I and Q baseband signals with bandwidth of 530MHz or higher. The LTC5585IUF incorporates balanced I and Q mixers, LO buffer amplifiers and a precision, high frequency quadrature phase shifter. The integrated on-chip broadband transformer provides a single-ended interface at the RF input with simple off-chip L-C matching. In addition, the LTC5585IUF provides four analog control voltage interface pins for IIP2 and DC offset correction, greatly simplifying system calibration.

The high linearity of the LTC5585IUF provides excellent spurfree dynamic range for the receiver. This direct conversion demodulator can eliminate the need for intermediate frequency (IF) signal processing, as well as the corresponding requirements for image filtering and IF filtering. These I/Q outputs can interface directly to channel-select filters (LPFs) or to baseband amplifiers.

Features