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Direct-Conversion Tuner ICs for Digital DBS Applications

Product Details

Key Features

Simplified Block Diagram

Technical Docs

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Key Features

  • Low-Cost Bipolar Design, Lowest Cost Architecture
  • Operate from a Single +5V Supply
  • 950MHz to 2150MHz Input Frequency Range*
  • On-Chip Quadrature Generator, Dual-Modulus Prescaler (/64, /65)
  • Input Levels
    • 69dBm to -19dBm per Carrier (MAX2102)
    • -60dBm to -19dBm per Carrier (MAX2105)
  • Over 50dB AGC Control Range (MAX2102)
  • Noise Figure = 13.2dB (MAX2102); IP3 = 6.5dBm (at 1450MHz)
  • Automatic Baseband Offset Correction
  • Easy Interface to MAX1002/MAX1003 Dual ADC and Popular Baseband ICs

Applications/Uses

  • Broadband Systems
  • Cell Phone Base Stations
  • DBS Tuners
  • DVB-Compliant DBS Tuners
  • LMDS
  • Wireless Local Loop (WLL)

Description

The MAX2102/MAX2105* are low-cost direct-conversion tuner ICs designed for use in digital direct-broadcast satellite (DBS) television set-top box units. The direct-conversion architecture reduces system cost compared to devices with IF-based architectures.

The MAX2102/MAX2105 directly tune L-band signals to baseband using a broadband I/Q downconverter. Operating frequency range spans from at least 950MHz to 2150MHz.

The ICs include a low-noise amplifier (LNA) with automatic gain control (AGC), two downconverter mixers, an oscillator buffer with 90° quadrature generator and prescaler, and baseband amplifiers.

The MAX2102 features an AGC range of 50dB, allowing input power levels as low as -69dBm. The MAX2105 has a reduced AGC range of 41dB and accepts input power levels down to -60dBm. The reduced AGC range of the MAX2105 allows the use of a high-gain external LNA to achieve a lower system noise figure (NF).

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.