RF SILICON AND SUBSYSTEMS SOLUTIONS FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS MT2122 SINGLE-CHIP BROADBAND TUNER PRODUCT BRIEF The MT2122 is a fully integrated broadband tuner for analog and digital OpenCable set-top boxes, home gateways, cable modems and HDTV applications. MT2122 Single-Chip Broadband Tuner The MicroTuner™ MT2122 is a fully integrated single-chip tuner, with functional blocks specifically designed to ease implementation of high-performance analog and digital OpenCable™ set-top boxes. It supports advanced analog/digital set-top boxes (STB) including OpenCable™, home gateways, cable modems and HDTV applications. The MT2122 has been developed to give manufacturers design flexibility at low cost without compromising high performance. The MT2122 receives signal from 48 – 1100 MHz. It features integrated filter components and controls that allow for a simple, alignment-free pre-select filter. This provides excellent end-to-end linearity performance in severely sloped input conditions. MT2122 greatly reduces complexity for the Multimedia over Coax Alliance (MoCA™) applications. Its dual-conversion architecture ensures consistent OpenCable compliant performance with no manual alignment. The on-chip buffer amplifier for Forward Data Channel (FDC) reduces bill of materials (BOM) cost while improving performance compared to solutions using a directional coupler. The MT2122 includes a PIN diode attenuator linearizer circuit that can drive a PI-network pin diode attenuator in the signal path. The MT2122 also supports multi-tuner front-end implementations and is programmable through a serial bus interface. APPLICATIONS • • • • Advanced analog and digital set-top boxes (STB) including OpenCable. Home gateways Cable modems HDTV FEATURES • • • • • • • • • • • • • • • • Output fully compatible with demodulators for MoCA, NTSC, PAL, SECAM, DAVIC, DVB-C, DOCSIS®, EuroDOCSIS™, OpenCable and other standards On-chip amplifier for Forward Data Channel (FDC) Ease of multi-tuner front-end implementations Dual-conversion architecture for consistent OpenCable compliant performance Serial control interface One general purpose output controllable via serial control interface On-chip frequency synthesis system integrating PLL, VCOs and varactors. 1.1 GHz bandwidth No need for the 28 V to 33 V supplies typically required by traditional cable tuners Automatic frequency control (AFC) voltage detector for frequency fine-tuning Integrated temperature sensor for thermally sensitive systems 3.3 V and 5 V serial bus compatible No tunable parts required Simple interface to external filters Software shutdown mode Small 8 mm x 8 mm 56-pin QFN package MT2122 SINGLE-CHIP BROADBAND TUNER PRODUCT BRIEF LBinn UPCVCC UPCVCC GND MIX1OUTp MIX1OUTn GND MIX2VCCrf MIX2INp MIX2INn AGCCTRL 52 51 50 49 48 47 46 45 44 43 LBshn 53 LO2LPF GND 10 33 11 32 AFCin LO1LPF 12 31 VGAINp GPO 13 30 VGAINn A0 14 29 VGACTRL Ω ABSOLUTE RATINGS 28 LO1reg VCCLO1 kHz 800 54 VCCLO2 34 VGAVCC MIX2 differential load impedance 35 9 27 400 8 LO1tcm2 VGAVCC Serial control clock LO1tcm1 26 Ω 300 LO2reg VGAOUTn °C 36 Exposed die attach paddle on package bottom 25 125 VGA differential output load impedance mV 7 VGAOUTp 15 Operating junction temperature LO2tcm FDCout 24 Supply voltage ripple 37 DVCCLO2 V 6 23 3.45 IFVCC FDCVcc SROOUT 3.3 38 22 3.15 5 SROVCC Supply voltage 3.3 V MIX2OUTn FDCin 21 V MIX2OUTp 39 20 5.25 40 4 XTALp 5.0 3 LBinp XTALn 4.75 LBshp 19 Supply voltage 5 V PINSe SerVCC MHz PINSh 41 18 60 42 2 17 30 1 SerCLK Second intermediate frequency (programmable) MHz HBinp HBshp SerData 1690 HBinn MHz HBshn 1100 55 UNIT 16 48 First intermediate center frequency MAX 15 Input frequency range TYP A1 MIN DVCCLO1 PARAMETER 56 RECOMMENDED OPERATING CONDITIONS MT2122 Pin Diagram PARAMETER MIN Supply voltage, +5 V MAX UNIT 6 V Supply voltage, +3.3 V 3.6 V Junction temperature 125 °C Storage temperature -50 Lead-free solder temperature for 5 seconds Relative humidity Input voltage -0.3 150 °C 260 °C 95 % VCC +0.3 V MIX2 Output 1st IF Saw 2nd IF Saw Input Balun PIN Diode Atten MHz In VGA Output Selectable Preslector Filter RF Gain Control LNA Pin Diode Controller FDC MIX1 MIX2 LO1 LO2 PLL PLL Charge Pump Charge Pump VGA IF Gain Control Die Temp Sensor FDC OOB Tuner 3-bit AD AFC In/Temp Out Serial Bus Clock Data GPO Loop Filter Buffered Reference Output Loop Filter MT2122 Block Diagram 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 is a registered trademark of Microtune, Inc. MicroTuner, MicroStreamer, VideoCaster, DataCaster, 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; 6,163,684; 6,169,569; 6,172,378; 6,177,964; 6,211,745; 6,218,899; 6,268,778; 6,310,387; 6,323,736; 6,355,537; 6,429,502; 6,462,327; 6,535,068; 6,580,313; 6,608,522; 6,631,257; 6,714,776; 6,725,463; 6,744,308; 6,771,124; 6,784,945; 6,804,099; 6,888,406; 6,891,435; 6,906,594; 6,909,886; 6,920,182; 6,922,556; 6,963,478; 6,973,288; 6,993,310; 7,035,614; D469,742 and additional patents pending or filed. Entire contents Copyright © 1996 - 2006 Microtune, Inc. MT2122 PB-00121 — Rev 1.0 060206 June 2006