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Maxim Integrated
MAX1473
Maxim Integrated
MAX2112
 
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MAX2120
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MAX2112

Complete, Direct-Conversion Tuner for DVB-S2 Applications

Maxim Integrated

The MAX2112 direct-conversion tuner IC is designed for satellite set-top and VSAT applications. The IC is intended for 8PSK and Digital Video Broadcast (DVB-S2) applications. The MAX2112 directly converts the satellite signals from the LNB to baseband using a broadband I/Q down converter. The operating frequency range extends from 925MHz to 2175MHz.

Datasheets:
Product Description

The device includes an LNA and an RF variable-gain amplifier, I and Q down converting mixers, and baseband low pass filters with programmable cutoff frequency control and digitally controlled baseband variable-gain amplifiers. Together, the RF and baseband variable-gain amplifiers provide more than 80dB of gain control range. The IC is compatible with virtually all DVB-S2 demodulators. The MAX2112 includes fully monolithic VCOs, as well as a complete fractional-N frequency synthesizer. Additionally, an on-chip 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. The IC features a VCO auto select (VAS) function that automatically selects the proper VCO. For multituner applications, the device can be configured to have one of two 2-wire interface addresses. A low-power standby mode is available whereupon the signal path is shut down while leaving the reference oscillator, digital interface, and buffer circuits active, providing a method to reduce power in single and multituner applications.

Features
  • Monolithic VCO, Low Phase Noise: -97dBc/Hz at 10Khz
  • High Dynamic Range: -75dBm to 0dBm
  • Integrated Variable BW LP Filters: 4MHz to 40MHz
  • Low-Power Standby Mode
  • Address Pin for Multituner Applications
  • Differential I/Q Interface
Applications:
  • DirecTV and Dish Network DBS
  • DVB-S2
  • VSATs
Specifications
  • Antenna Connector:PCB, Surface Mount
  • Applications:Digital TV, CATV, Set Top Boxes
  • Current - Receiving:100mA
  • Data Interface:PCB, Surface Mount
  • Frequency:925MHz ~ 2.175GHz
  • Package / Case:28-WFQFN Exposed Pad
  • Packaging:Tube
  • Supplier Device Package:28-TQFN (5x5)
  • Voltage - Supply:3.13 V ~ 3.47 V
Parts

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MAX2112ETI+MAX2112ETI+IC TUNER DIR-CONV DVB-S2 28TQFN 925MHz ~ 2.175GHz---28-WFQFN Exposed PadRoHS
MAX2112CTI+MAX2112CTI+IC TUNER DIR-CONV DVB-S2 28TQFN 925MHz ~ 2.175GHz---28-WFQFN Exposed PadRoHS

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