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

Features
♦ Low-Cost Architecture
♦ Operates from Single 5V Supply
♦ 925MHz to 2175MHz Input Frequency Range
♦ On-Chip Quadrature Generator, Dual-Modulus Prescaler (/32, /33)
♦ On-Chip Crystal Amplifier
♦ PLL Mixer with Gain-Controlled Charge Pump
♦ Input Levels: -25dBm to -65dBm per Carrier
♦ Over 40dB Gain Control Range
♦ Noise Figure = 11.5dB; IIP3 = 7dBm (at 1550MHz)
♦ Automatic Baseband Offset Correction
♦ Loopthrough Replaces External Splitter
♦ Crystal Output Buffer

Applications
    DirecTV, PrimeStar, EchoStar DBS Tuners
    DVB-Compliant DBS Tuners
    Broadband Systems
    LMDS