General Description
The MAX2106 low-cost, direct-conversion tuner IC is designed for use in digital direct-broadcast satellite (DBS) television set-top box units and is a pin-for-pin upgrade for the MAX2104. Its direct-conversion architecture reduces system cost compared to devices with IF-based architectures. The MAX2106 directly tunes L-band signals to baseband using a broadband I/Q downconverter. The operating frequency range spans 925MHz to 2175MHz.

Features
♦ Drop-In Replacement for MAX2104 Designs Requires Only Minor Software Upgrade and Two External Resistor Value Changes
♦ Complete Low-Cost Solution for DBS Direct Downconversion
♦ High Level of Integration Minimizes Component Count
♦ 1MBaud to 45MBaud Operation
♦ Selectable LO Buffer
♦ +5V Single-Supply Operation
♦ 925MHz to 2175MHz Input Frequency Range
♦ On-Chip Quadrature Generator, Dual-Modulus Prescaler (/32, /33)
♦ On-Chip Crystal Oscillator Amplifier
♦ PLL Phase Detector with Gain-Controlled Charge Pump
♦ Input Levels: -25dBm to -68dBm per Carrier
♦ Over 50dB Gain Control Range
♦ Noise Figure = 10.2dB; IIP3 = +11.5dBm (at 1550MHz)
♦ Automatic Baseband Offset Correction

Applications
    U.S. DSS Set-Top Receivers
    European DVB-Compliant Systems
    Cellular Base Stations
    Wireless Local Loop
    Broadband Systems
    LMDS
    Professional Receivers
    VSAT
    Microwave Links