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MAX2121 - Complete Direct-Conversion L-Band Tuner

General Description

The MAX2121 low-cost, direct-conversion tuner IC is designed for satellite set-top and VSAT applications.

The device directly converts the satellite signals from the LNB to baseband using a broadband I/Q downconverter.

The operating frequency range extends from 925MHz to 2175MHz.

Key Features

  • a VCO autoselect (VAS) function that automatically selects the proper VCO. For multituner.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MAX2121 19-5959; Rev 1; 7/12 EVAALVUAAILTAIOBNLEKIT Complete Direct-Conversion L-Band Tuner General Description The MAX2121 low-cost, direct-conversion tuner IC is designed for satellite set-top and VSAT applications. The device directly converts the satellite signals from the LNB to baseband using a broadband I/Q downconverter. The operating frequency range extends from 925MHz to 2175MHz. The device includes an LNA and an RF variable-gain amplifier, I and Q downconverting mixers, and baseband lowpass filters and digitally controlled baseband variable-gain amplifiers. Together, the RF and baseband variable-gain amplifiers provide more than 80dB of gain control range. The device includes fully monolithic VCOs, as well as a complete fractional-N frequency synthesizer.