MAX2118

www.DataSheet4U.com 19-2433; Rev 2; 3/05 Complete DBS Direct-Conversion Tuner ICs with Monolithic VCOs General Description The MAX2116/MAX2118 family of low-cost directconversion tuner ICs are designed for use in digital direct broadcast satellite (DBS) television applications, professional VSAT systems, and two-way Internet through satellite applications. These devices set the standard for integration and performance, significantly reducing the required RF know-how for design implementation. Uniquely architected, the MAX2116/MAX2118 simplify direct main board and tuner module designs. The MAX2116/MAX2118 devices directly convert Lband signals to baseband using a broadband I/Q downconverter. The operating frequency range extends from 925MHz to 2175MHz. Each IC includes an LNA with gain control, I and Q downconverting mixers, and baseband lowpass filters gain and cutoff frequency control. Together, the RF and baseband variable gain amplifiers provide more than 79dB of gain control range. The devices include fully monolithic VCOs, as well as a complete frequency synthesizer. Additionally, an onchip crystal oscillator is provided along with a buffered output for driving additional tuners and demodulators. Synthesizer programming and device configuration are accomplished with a 2-wire serial interface. For multituner applications, each device can be configured to have one of eight possible 2-wire interface addresses. Simplifying the interface to low-voltage CMOS demodulators, th...