GENERAL DESCRIPTION

The ADL5387 is a broadband quadrature I/Q demodulator that covers an RF/IF input frequency range from 50 MHz to 2 GHz. With a NF = 13.2 dB, IP1dB = 12.7 dBm, and IIP3 = 32 dBm @ 450 MHz, the ADL5387 demodulator offers outstanding dynamic range suitable for the demanding infrastructure direct-conversion requirements. The differential RF/IF inputs provide a well behaved broadband input impedance of 50 Ω and are best driven from a 1:1 balun for optimum performance.

FEATURES

Operating RF frequency 50 MHz to 2 GHz

LO input at 2 × fLO 100 MHz to 4 GHz

Input IP3: 31 dBm @ 900 MHz

Input IP2: 62 dBm @ 900 MHz

Input P1dB: 13 dBm @ 900 MHz

Noise figure (NF) 12.0 dB @ 140 MHz 14.7 dB @ 900 MHz

Voltage conversion gain > 4 dB

Quadrature demodulation accuracy Phase accuracy ~0.4° Amplitude balance ~0.05 dB

Demodulation bandwidth ~240 MHz

Baseband I/Q drive 2 V p-p into 200 Ω

Single 5 V supply

APPLICATIONS

QAM/QPSK RF/IF demodulators

W-CDMA/CDMA/CDMA2000/GSM

Microwave point-to-(multi)point radios

Broadband wireless and WiMAX

Broadband CATVs