ADI LT5506EUF#PBF

解调器80MHz ~ 1GHz40MHz ~ 500MHz

Overview

The LT5506EUF is a 40MHz to 500MHz monolithic integrated quadrature demodulator with variable gain amplifier (VGA), designed for low voltage operation. It supports standards that use a linear modulation format. The chip consists of a VGA, quadrature down-converting mixers and lowpass noise filters. The LO port consists of a divide-by-two stage and LO buffers. The IC provides all building blocks for IF down-conversion to I and Q baseband signals with a single supply voltage of 1.8V to 5.25V. The VGA gain has a linear-in- dB relationship to the control input voltage. Hard-clipping amplifiers at the mixer outputs reduce the recovery time from a signal overload condition. The lowpass filters reduce the out-of-band noise and spurious frequency components. The cut-off frequency of the noise filters is approximately 8.8MHz. The external 2xLO frequency is required to be twice the IF input frequency for the mixers. The standby mode provides reduced supply current and fast transient response into the normal operating mode when the I/Q outputs are AC-coupled to a baseband chip.

Features

Tube Package
Demodulator Function
80MHz ~ 1GHz LO Frequency
40MHz ~ 500MHz RF Frequency
59dB Gain
6.8dB Noise Figure
36 mA Current - Supply
1.8V ~ 5.25V Voltage - Supply
Surface Mount Mounting Type