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Direct-Conversion TV Tuner

Silicon TV Tuner Saves Power, Eliminates SAW Filters

Product Details

The MAX3580 fully integrated, direct-conversion TV tuner is designed for Digital Video Broadcasting-Terrestrial (DVB-T) applications. The integrated tuner covers a 170MHz to 230MHz input frequency range for the VHF-III band and 470MHz to 878MHz for the UHF band.

The MAX3580 direct-conversion tuner integrates an RF input switch and a multiband tracking filter, allowing low-power tuner-on-board applications without the cost and power-dissipation issues of dual-conversion tuner solutions. The zero-IF architecture eliminates the need for SAW filters by providing baseband I and Q outputs directly to the demodulator. In addition, DC-offset cancellation is implemented on-chip using a mixed-signal architecture to improve the second-order distortion performance and the dynamic range of the downstream digitizer and demodulator.

The MAX3580 features dynamic gain control of more than 76dB and a typical midband noise figure of 4.7dB referred to the LNA input. The VCO architecture optimizes both in-band and wideband phase noise for OFDM applications where sensitivity to both 1kHz phase noise and wideband phase noise related to strong adjacents can be a problem.

The MAX3580 communicates using a 2-wire serial bus. The device operates from a typical +3.3V power supply and dissipates 650mW. The MAX3580 is available in a small 32-pin thin QFN package (5mm x 5mm) with an exposed paddle.

Key Features

  • 650mW Power Dissipation (at VCC = +3.3V)
  • I and Q Baseband Outputs Eliminate All IF-SAW Filters
  • Integrated RF Tracking Filters
  • Tunable Baseband Lowpass Filters
  • Full-Band VHF-III and UHF Tuning
  • +38dB Digital ACPR, +47dB Analog ACPR
  • Low Noise Figure: 4.7dB (typ)
  • Frac-N Synthesizer for -90dBc/Hz Close-In Phase Noise
  • +3.1V to +3.5V Supply Voltage Range
  • Ultra-Small, 5mm x 5mm Thin QFN Package

Applications/Uses

  • Digital Televisions
  • Digital Terrestrial Set-Tops
  • Laptop Televisions
  • USB Peripherals

Simplified Block Diagram

MAX3580: Functional Diagram MAX3580: Functional Diagram Zoom icon

Technical Docs

Design & Development

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Parameters

Key Features

  • 650mW Power Dissipation (at VCC = +3.3V)
  • I and Q Baseband Outputs Eliminate All IF-SAW Filters
  • Integrated RF Tracking Filters
  • Tunable Baseband Lowpass Filters
  • Full-Band VHF-III and UHF Tuning
  • +38dB Digital ACPR, +47dB Analog ACPR
  • Low Noise Figure: 4.7dB (typ)
  • Frac-N Synthesizer for -90dBc/Hz Close-In Phase Noise
  • +3.1V to +3.5V Supply Voltage Range
  • Ultra-Small, 5mm x 5mm Thin QFN Package

Applications/Uses

  • Digital Televisions
  • Digital Terrestrial Set-Tops
  • Laptop Televisions
  • USB Peripherals

Description

The MAX3580 fully integrated, direct-conversion TV tuner is designed for Digital Video Broadcasting-Terrestrial (DVB-T) applications. The integrated tuner covers a 170MHz to 230MHz input frequency range for the VHF-III band and 470MHz to 878MHz for the UHF band.

The MAX3580 direct-conversion tuner integrates an RF input switch and a multiband tracking filter, allowing low-power tuner-on-board applications without the cost and power-dissipation issues of dual-conversion tuner solutions. The zero-IF architecture eliminates the need for SAW filters by providing baseband I and Q outputs directly to the demodulator. In addition, DC-offset cancellation is implemented on-chip using a mixed-signal architecture to improve the second-order distortion performance and the dynamic range of the downstream digitizer and demodulator.

The MAX3580 features dynamic gain control of more than 76dB and a typical midband noise figure of 4.7dB referred to the LNA input. The VCO architecture optimizes both in-band and wideband phase noise for OFDM applications where sensitivity to both 1kHz phase noise and wideband phase noise related to strong adjacents can be a problem.

The MAX3580 communicates using a 2-wire serial bus. The device operates from a typical +3.3V power supply and dissipates 650mW. The MAX3580 is available in a small 32-pin thin QFN package (5mm x 5mm) with an exposed paddle.

Simplified Block Diagram

MAX3580: Functional Diagram MAX3580: Functional Diagram Zoom icon

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