It briefly introduced the MAX2106 function, internal structure and pin array . 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. The MAX2106 directly tunes L-band signals to base-band using a broadband I/Q down-converter. The IC includes a low-noise amplifier (LNA) with gain control, I and Q down-converting mixers, low-pass filters with gain and frequency control, a local oscillator (LO) buffer with a 90° quadrature network, and a charge-pump based phase-locked loop (PLL) for frequency control. The MAX2106 has an on-chip LO, requiring only an external varactor-tuned LC tank for operation. The LO’s output drives the internal quadrature agenerator and has a buffer amplifier to drive off-chip circuitry.
The MAX2106 is mostly apply for U.S. DSS Set-Top Receivers, European DVB-Compliant Systems , Cellular Base Stations, Wireless Local Loop, Broadband Systems, LMDS, Professional Receivers, VSAT, Microwave Links and so on.
Keywords: Broadband I/Q Down-converter I and Q down-converting mixers
Ceramic chip capacitor Prescaler Charge-pump