M I C R O T U N E™ CABLE MODEM TUNER AND DIGITAL SET-TOP BOX APPLICATIONS MT2050 SINGLE-CHIP BROADBAND TUNER Preliminary and Confidential APPLICATIONS • Cable modems / voiceenabled cable modems • Digital set-top boxes (STB) • Home gateways FEATURES • 48 MHz to 860 MHz input frequency range • Works seamlessly with all analog and digital demodulators • Low power dual-conversion architecture • Minimal external components • No manually tunable parts required • Simple interface to external filters • Integrated IF variable gain amplifier for direct connection to digital demodulators • Fully compatible with NTSC, PAL, SECAM, DAVIC, DVB-C, DOCSIS 1.0, 1.1 and 2.0, EuroDOCSIS and other standards MT2050 Tuner The MT2050 is an advanced single-chip broadband tuner that has been optimized for high performance cable modems and digital cable STBs that require low composite distortion and noise under digital cable environments. The MT2050 includes all active circuitry required to implement total RF functionality, making it the world’s first complete RF/amplifier silicon front end. It is capable of receiving frequencies in the 48 MHz to 860 MHz range and converting a selected channel to a standard intermediate frequency (IF). Supported IF frequencies include NTSC, PAL, and digital standards including DOCSIS, EuroDOCSIS, DVB-C, and ITU J83, A, B, C. The MT2050’s low close-in phase noise allows it to be used for both digital and analog video signals including video, high speed data, and voice. Its dualconversion 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. Product Brief MT2050 SINGLE-CHIP BROADBAND TUNER PRODUCT BRIEF CABLE MODEM TUNER AND DIGITAL SET-TOP BOX APPLICATIONS DNC VCCfga PARAMETER 37 38 MIX2in MIX2ip DNC VCCmx2 39 40 41 42 MIX1op VCCmx1 43 MIX1on 44 GPO2 46 45 VCClna ELECTRICAL CHARACTERISTICS 47 48 VLNAip PIN DIAGRAM VLNA VLNAin 1 VCClna 2 DAGCin 3 AVCClo1 4 LO1tk1 5 FGA MIX1 MIX2 PKDET LO1 PLL VCO2 36 FGAop 35 FGAon 34 AVCClo2 33 LO2tk 32 LO2reg 31 LO2lpf 30 DNC 29 DVCClo2 28 GPO1 27 DNC 26 VGAip 25 VGAin VCO1 6 LO2 PLL 19 SROp 18 SROn 17 VCC 16 DNC 15 SERsda 14 13 SERen SERscl Preliminary and Confidential SRO 23 12 IF VGA A/D 24 SERca Temp SER VGActrl 11 22 10 DNC VGAon GPO0 21 9 VGAop LO1lpf Charge Pump 20 7 8 GPADin LO1reg DVCClo1 Charge Pump VCCvga LO1tk2 RECOMMENDED OPERATING CONDITIONS PARAMETER MIN Input frequency range First intermediate center frequency UNIT 860 MHz MHz 30 4.75 60 5 Supply voltage ripple Operating junction temperature VGA output load impedance MAX 1220 Second intermediate center frequency (programmable) Supply voltage TYP 48 MHz 5.25 V 15 mV 100 °C 300 Ω Serial control clock 400 kHz ABSOLUTE MAXIMUM RATINGS PARAMETER MIN MAX 6 V -40 +150 °C +245 °C -0.3 VCC +0.3 V Supply voltage Storage temperature range Lead temperature (soldering, 4 seconds) Input voltage UNIT Power Supply Active current Shut-down current Upconversion Input frequency range Return loss First IF center frequency Noise figure, max gain Terminal voltage gain AGC range Gain variation at any frequency OIP3 Downconversion Input frequency range Noise figure Terminal voltage gain Image rejection OIP3 LO1 LO frequency LO step size Phase noise (10 kHz) Phase noise (100 kHz) Spurious LO2 LO frequency LO step size Phase noise (10 kHz) Phase noise (100 kHz) Spurious IF VGA Frequency range Output voltage Terminal voltage gain Noise figure, max gain OIP3 Serial Interface Serial clock frequency VIH MIN TYP MAX 325 40 48 mA mA 860 9.5 1220 7 18 30 -3 UNIT +3 MHz dB MHz dB dB dB dB 68 72 dBmV 28 77 1220 10 29 33 79 MHz dB dB dBc dBmV 1268 2080 1 -86 -109 -60 1160 1190 50 -94 -114 -60 30 60 1.0 12.5 51.5 12.5 76 MHz kHz dBc/Hz dBc/Hz dBc MHz Vp-p dB dB dBmV 400 kHz V 1.5 V 2.3 VIL MHz kHz dBc/Hz dBc/Hz dBc Worldwide Headquarters • Microtune, Inc., 2201 Tenth Street, Plano, TX 75074, USA • Tel: +1-972-673-1600, Fax: +1-972-673-1602, E-mail: [email protected], Web site: www.microtune.com For a detailed list of design centers, sales offices, and sales representatives, visit our Web site at www.microtune.com. The information in this document is believed to be accurate and reliable. Microtune assumes 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 granted 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 notice. 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 assistance 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, MicroTuner, MicroStreamer, VideoCaster, and the Microtune 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; 5,737,035; 5,739,730; 5,805,988; 5,847,612; 6,100,761; 6,104,242; 6,144,402; 6,163,684; 6,169,569; 6,177,964; 6,218,899 and additional patents pending or filed. Entire contents Copyright © 2002 Microtune, Inc. PB-00038 Rev 1.0 — April 2002 Page 2 of 2