MT2068 MICROTUNE | Alldatasheet

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RF SILICON AND SUBSYSTEMS SOLUTIONS FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS MT2068 SINGLE-CHIP BROADBAND TUNER PRODUCT BRIEF The MT2068 is a low-power 3.3 V single-chip broadband tuner with an integrated IF variable-gain amplifier. The MicroTuner™ MT2068 is an advanced, low-power single-chip broadband tuner that has been optimized for high-performance cable modems, DVB-C & DSG STB’s and embedded DOCSIS adapters (eDOCSIS) that require low composite distortion and noise under digital cable environments. The MT2068 is capable of receiving frequencies in the 48 MHz to 1.0 GHz range and of converting a selected channel to a standard intermediate frequency (IF) between 30 MHz and 60 MHz. The MT2068’s low phase noise makes it ideal for use in digital applications such as video, voice and high-speed data. Its dual- conversion architecture, with no requirement for tracking filters, yields the desirable characteristics of traditional cable television tuners: controlled input impedance across the entire input band, low in-band emissions, and outstanding image rejection. In addition, the MT2068 provides excellent in-band flatness as well as very repeatable gain characteristics across the complete reception band. With minor bill of material (BOM) changes, the MT2068 is capable of supporting multiple output standards. The MT2068’s low power consumption significantly conserves current and can be effectively used in battery backed-up EMTA’s, multi-tuner DVB-C (MPEG) and DOCSIS (IP Video) STB applications.

APPLICATIONS

  • VoIP Telephony Modems
  • Cable Modems
  • Multi-tuner All-Digital Set-top Boxes (MPEG or IP Video)
  • Digital Set-top Boxes without loop- through

FEATURES

  • 48 MHz to 1.0 GHz input frequency range
  • 3.3 V power supply
  • Works seamlessly with digital demodulators
  • Low-power sub-1 Watt dual- conversion architecture
  • Integrated first IF filter
  • Single-ended RF input reduces BOM by eliminating input balun
  • Minimal external components
  • No manually tunable parts required
  • Integrated IF variable gain amplifier for direct connection to digital demodulators
  • Fully compatible with DAVIC, DVB-C, DOCSIS 1.0, 1.1, and 2.0, EuroDOCSIS, and other standards MT2068 Single-Chip Broadband Tuner

MT2068 SINGLE-CHIP BROADBAND TUNER PRODUCT BRIEF MT2068 PB-00152 — Rev 1.1 May 2008 P R E L I M I N A R Y RECOMMENDED OPERATING CONDITIONS PARAMETER M IN T YP M AX U NIT Supply voltage 3.15 3.3 3.45 V Supply voltage ripple 25 mVp-p Operating junction temperature 100 °C VGA load impedance 200 Ω Serial control clock 400 kHz ABSOLUTE MAXIMUM RATINGS PARAMETER M IN M AX U NIT Supply voltage 3.6 V Storage temperature range -40 150 °C Lead-free temperature (soldering 5 seconds) 245 °C Input voltage -0.3 VCC +0.3 V TUNER ELECTRICAL CHARACTERISTICS PARAMETER M IN T YP M AX U NIT Power supply Active current 257 mA RF signal path Input frequency range 48 1000 MHz Return loss 8 dB Noise figure at max gain 9.5 dB Voltage gain RS = 75 Ω 42 dB RF AGC range 29 dB Image rejection 60 dBc LO phase noise (10 kHz) -84 dBc/Hz LO phase noise (100 kHz) -106 dBc/Hz LO step size 50 kHz IF VGA Frequency Range 30 60 MHz Output voltage 2.0 Vp-p AGC range 37 dB Microtune, Inc., 2201 10th Street, Plano, TX 75074, USA Tel: +1-972-673-1600, Fax: +1-972-673-1602, E-mail: sales@microtune.com, Web site: www.microtune.com For a detailed list of office locations, sales offices, and sales representatives, visit our web site at www.microtune.com Microtune believes that the information in this document is accurate and reliable, as of the date of this document. Microtune a ssumes no responsibility for any consequences arising from the use of this information, nor from any infringement of patents or the rights of third parties which may result from its use. No license is g ranted by implication or otherwise under any patent or other rights of Microtune. The information in this publication replaces and supersedes all information previously supplied, and is subject to change without n otice. The customer is responsible for assuring that proper design and operating safeguards are observed to minimize inherent and procedural hazards. Microtune assumes no responsibility for applications assis tance or customer product design. The devices described in this document are not authorized for use in medical, life-support equipment, or any other application involving a potential risk of severe property or environmental damage, personal injury, or death without prior express written approval of Microtune. Any such use is understood to be entirely at the user’s risk. Microtune is a registered trademark of Microtune, Inc. MicroTuner, MicroStreamer, VideoCaster, DataCaster, ClearTune, and the M icrotune logo are trademarks of Microtune, Inc. All other trademarks belong to their respective companies. Microtune’s products are protected by one or more of the following U.S. patents: 5,625,325; 5,648,744; 5,717,730; 5,737,035C1; 5,739,730; 5,805,988; 5,847,612; 6,100,761; 6,104,242; 6,163,684; 6,169,569; 7,171,176; 7,184,724; 7,190,942; 7,190,943; 7,242,918; 7,274,410; 7,304,689; 7,304,533; 7,304,393; 7,313,201; D469,742 and additional patents pending or filed. Microtune’s products are protected by one or more of the following International patents: United Kingdom: 1532732; Germany: 60313621.4; Netherlands: 1532732; France: 1532732; and additional patents pending or file d. Entire contents Copyright © 1996 - 2008 Microtune, Inc. 011108 UPCVCC NC LO1AVCC LO1REG LO1T1 LO1T2P LO1T2N LO1LPF LO1DVCC SROout SROP SRON VCC SERDATA SERCLK SERADDR GPIO LO2DVCC LO2LPF LO2TP LO2TN LO2REG LO2AVCC IFAGC VGAOUTN VGAOUTP VGAVCC VGAINN VGAINP DNCN DNCP DNCVCC UPCVCC UPCVCC NC RFCAP RFIN 1 20 31 Exposed paddle on package bottom NC GND GND MT2068 Pin Diagram MT2068 Block Diagram LO1 LO2 RFPM GCU FCU SROSER IFPM ATN UPC DNC FIFF VGA

16 MHz

4.8 or 16 MHz