Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications

3.3V Satellite Tuner Provides Low Noise Figure and High Linearity at Only 330mW

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The MAX2120 low-cost, direct-conversion tuner IC is designed for satellite set-top and VSAT applications. The IC is intended for QPSK, Digital Video Broadcast (DVB-S), DSS, and free-to-air applications.

The MAX2120 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 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 QPSK demodulators.

The MAX2120 includes fully monolithic VCOs, as well as a complete 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 autoselect (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.

The MAX2120 is the most advanced DBS tuner available today. The low noise figure eliminates the need for an external LNA. A small number of passive components are needed to form a complete DVB, DBS, or VSAT RF front-end solution. The tuner is available in a very small 28-pin thin QFN package.
MAX2120: Typical Operating Circuit MAX2120: Typical Operating Circuit Enlarge+

Key Features

  • 925MHz to 2175MHz Frequency Range
  • Monolithic VCO: No Calibration Required
  • -75dBm to 0dBm High Dynamic Range
  • 4MHz to 40MHz Integrated Variable BW LP Filters
  • Single +3.3V ±5% Supply
  • Low-Power Standby Mode
  • Address Pin for Multituner Applications
  • Differential I/Q Interface
  • I²C 2-Wire Serial Interface
  • Very Small 28-Pin Thin QFN Package


  • DirecTV and Dish Network DBS
  • DVB-S
  • Free-to-Air
  • Two-Way Satellite Systems
  • VSATs

See parametric specs for TV Tuners (9)

Part NumberApplicationsInput Frequency
IF Output Freq.
Ref. Clock Freq.
Noise Figure
(mm x mm)
Oper. Temp.
typSee Notes
MAX2120 DVB-S925 to 2175404 to 883.13 to 3.471005.0 x 5.00 to +70
$2.06 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX2120EVKIT: Evaluation Kit for the MAX2120
Product Reliability Reports: MAX2120.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Related Resources

Ultra-Wideband, Direct-Conversion, L-Band Satellite Tuner

  • 925MHz to 2175MHz Frequency Range
  • Monolithic VCO
  • High Dynamic Range: -75dBm to 0dBm