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| M I C R O T U N E(R) RF SILICON AND SUBSYSTEMS SOLUTIONS FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS MT2121 SINGLE-CHIP BROADBAND TUNER PRODUCT BRIEF The MT2121 has been optimized for high-performance analog and digital cable set-top boxes, supporting the 48 MHz to 1 GHz range of the cable spectrum. The MicroTunerTM MT2121 is a fully integrated single-chip tuner, with functional blocks specifically designed to ease implementation of an OpenCableTM - compliant set-top box (STB). The MT2121 contains integrated filter components and controls that allow for a simple, alignment-free pre-select filter. This provides excellent end-to-end linearity performance for severely sloped input conditions. The tuner also has an on-chip amplifier for Forward Data Channel (FDC) applications, reducing bill of materials (BOM) and improving performance-versus-solutions based on a directional coupler. APPLICATIONS All cable-based applications FEATURES * Dual-conversion architecture for consistent performance with no manual alignments Proven performance in dualfunction analog and digital set-top box designs Eliminates the need for the 28V to 33V supplies typically required by traditional cable tuners 3.3V and 5V serial bus compatible Minimal external components; simple interface to external filters Software shutdown mode Small 8mm x 8mm 56-lead QFN Quad Flat package available in lead-free Can be used in conjunction with Microtune's upstream amplifiers to create a complete RF front end for bi-directional set-top box applications * * * * * * MICROTUNE MT2121 Single-Chip Broadband Tuner Advanced analog/digital set-top boxes including OpenCable Residential gateways Home entertainment servers * M T2 1 2 1 SIN G L E- C HIP B R O ADB A ND T UN E R PRODUCT BRIEF RECOMMENDED OPERATING CONDITIONS MIX2VCCrf MIX1OUTp MIX1OUTn UPCVCC UPCVCC MIX2INp HBshn HBinn LBshn LBinn GND GND Input range First intermediate center frequency Second intermediate center frequency (programmable) Supply voltage, 5V Supply voltage, 3.3V Supply voltage ripple MIX 2 IF output load impedance Serial control clock 48 1220 30 4.75 3.15 800 1000 MHz MHz MIX2INn 44 57 5.25 3.45 15 MHz V V mV HBinp HBshp LBshp LBinp FDCin FDCVcc FDCout LO1tcm1 LO1tcm2 LO1reg VCCLO1 LO1LPF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 43 52 51 49 48 46 45 56 55 54 53 50 47 AGCCTRL PARAMETER MIN TYP MAX UNIT 42 41 40 39 38 PINSh PINSe MIX2OUTp MIX2OUTn IFVCC LO2tcm LO2reg VCCLO2 LO2LPF GND AFCIN VGAINp VGAINn VGACTRL Exposed die attach paddle on package bottom 37 36 35 34 33 32 31 30 29 400 kHz ELECTRICAL CHARACTERISTICS PARAMETER Power supply Noise figure, max RF gain, at FGA output Input return loss RF gain range IF gain range Image rejection 5.0V 3.3V At max RF AGC. Measured at FGA output. FDC not used. Referred to 75 0V to 3.3V control voltage 0.7V to 3.3V control voltage Undesired 90 MHz higher in frequency. 1kHz Phase noise Serial control clock frequency Noise figure, max RF gain and IF gain, at VGA output RFAGC at 3.3V. Measured at VGA output with FDC connected. 10kHz 100kHz CONDITION TYPICAL 270 mA 80 mA 10.6 dB 9 dB 30 dB 30 dB -75 dBc GPO A1 15 27 VGAVCC 17 20 21 25 23 16 22 A0 DVCCLO1 18 SerData SerVCC SerCLK 19 24 26 VGAOUTp MT2121 Pin Diagram VGAOUTn DVCCLO2 SROOUT SROVCC VGAVCC XTALn XTALp 28 Mix 2 Output -75 dBc/Hz -85 dBc/Hz -105 dBc/Hz Input Balun 1st IF Saw 2nd IF Saw 400 kHz 10.9 dB 48-1000 MHz In Pin Diode Atten Selectable Preslector Filter VGA Output IF Gain Control RF Gain Control Pin Diode Controller PLL PLL Die Temp Sensor 3-bit AD AFC In/Temp Out FDC Charge Pump Charge Pump ABSOLUTE MAXIMUM RATINGS PARAMETER Supply voltage Storage temperature range Lead temperature (soldering 4 seconds) Lead free temperature (soldering 4 seconds) Input voltage Serial Bus OOB Tuner GPO MIN -40 MAX 5.25 +150 +245 +250 UNIT V C C C V Loop Filter Buffered Reference Output Loop Filter MT2121 Block Diagram -0.3 VCC +0.3 Microtune, Inc., 2201 Tenth 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 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 B1; 6,771,124; 6,784,945; 6,804,099; 6,888,406; 6,891,435; 6,906,594; 6,909,886; 6,920,182; 6,963,478; D,469,742 and additional patents pending or filed. Entire contents Copyright (c) 1996 - 2005 Microtune, Inc. 110805 MT2121 PB-00067 -- Rev 1.2 DECEMBER 2005 |
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