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MAX2104

Direct-Conversion Tuner IC for Digital DBS Applications

GeneralDescription TheMAX2104low-costdirect-conversiontunerICisdesignedforuseindigitaldirect-broadcastsatellite(DBS)televisionset-topboxunits.Itsdirect-conversionarchitecturereducessystemcostcomparedtodeviceswithIF-basedarchitectures.TheMAX2104directlyconvertsL

MAX2104

直接變頻調(diào)諧器IC，適合數(shù)字DBS應(yīng)用; \n? Low-Cost Architecture \n? Operates from Single 5V Supply \n? 925MHz to 2175MHz Input Frequency Range \n? On-Chip Quadrature Generator, Dual-Modulus Prescaler (/32, /33) \n? On-Chip Crystal Amplifier \n? PLL Mixer with Gain-Controlled Charge Pump \n? Input Levels: -25dBm to -65dBm per Carrier \n? Over 40dB Gain Control Range \n? Noise Figure = 11.5dB; IIP3 = 7dBm (at 1550MHz) \n? Automatic Baseband Offset Correction \n? Loopthrough Replaces External Splitter \n? Crystal Output Buffer;

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.\n The IC includes an LNA gain control, I and Q downconverting mixers, lowpass filters with gain control and frequency control, a local oscillator (LO) buffer with a 90° quadrature network, and a charge-pump based PLL for frequency control. The MAX2104 also has an on-chip LO, requiring only an external varactor-tuned LC tank for operation. The output of the LO drives the internal quadrature generator and dual modulus prescaler. An on-chip crystal amplifier drives a reference divider as well as a buffer amplifier to drive off-chip circuitry. The MAX2104 is offered in a 48-pin TQFP-EP package.

MAX2104

Direct-Conversion Tuner IC for Digital DBS Applications

MAX2104CCM

PLASTIC ENCAPSULATED DEVICES

GeneralDescription TheMAX2104low-costdirect-conversiontunerICisdesignedforuseindigitaldirect-broadcastsatellite(DBS)televisionset-topboxunits.Itsdirect-conversionarchitecturereducessystemcostcomparedtodeviceswithIF-basedarchitectures.TheMAX2104directlyconvertsL

MAX2104_05

Direct-Conversion Tuner IC for Digital DBS Applications

MAX2104CCM+

Direct-Conversion Tuner IC for Digital DBS Applications