M I C R O T U N E® 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. RF SILICON AND SUBSYSTEMS SOLUTIONS FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS APPLICATIONS All cable-based applications MT2121 Single-Chip Broadband Tuner Advanced analog/digital set-top boxes including OpenCable Residential gateways Home entertainment servers 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 M I C R O T U N E The MicroTuner™ MT2121 is a fully integrated single-chip tuner, with functional blocks specifically designed to ease implementation of an OpenCable™ - 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. M T2 1 2 1 SIN G L E- C HIP B R O ADB A ND T UN E R PRODUCT BRIEF 57 4.75 15 MIX 2 IF output load impedance Serial control clock 400 MIX2VCCrf MIX2INp MIX2INn AGCCTRL 46 45 44 43 MIX1OUTn GND 47 MIX1OUTp 49 48 UPCVCC MIX2OUTp V LBinp 4 39 MIX2OUTn mV FDCin 5 38 IFVCC FDCVcc 6 FDCout 7 LO1tcm1 8 35 VCCLO2 LO1tcm2 9 34 LO2LPF LO1reg 10 33 GND VCCLO1 11 32 AFCIN LO1LPF 12 31 VGAINp GPO 13 30 VGAINn A1 14 29 VGACTRL TYPICAL IF gain range 0.7V to 3.3V control voltage 30 dB Image rejection Undesired 90 MHz higher in frequency. -75 dBc 22 23 24 25 26 27 28 DVCCLO2 VGAOUTp VGAOUTn VGAVCC VGAVCC 21 XTALp SROVCC 20 XTALn SROOUT 19 30 dB SerVCC 9 dB 0V to 3.3V control voltage 18 Referred to 75Ω RF gain range 80 mA 10.6 dB SerData Input return loss 3.3V 17 At max RF AGC. Measured at FGA output. FDC not used. 37 LO2tcm 36 LO2reg 270 mA SerCLK Noise figure, max RF gain, at FGA output Exposed die attach paddle on package bottom 15 5.0V MT2121 Pin Diagram Mix 2 Output 1kHz -75 dBc/Hz 10kHz -85 dBc/Hz 100kHz -105 dBc/Hz 1st IF Saw 2nd IF Saw Input Balun Serial control clock frequency Noise figure, max RF gain and IF gain, at VGA output GND 40 Power supply Phase noise 50 V 3 kHz CONDITION UPCVCC PINSe LBshp ELECTRICAL CHARACTERISTICS PARAMETER 51 PINSh 41 Ω 800 LBinn 42 3.45 Supply voltage ripple 52 1 2 5.25 3.15 LBshn HBinp HBshp MHz 16 Supply voltage, 3.3V 53 MHz HBshn 1220 30 Supply voltage, 5V MHz A0 Second intermediate center frequency (programmable) UNIT 1000 54 First intermediate center frequency MAX HBinn TYP 48 55 MIN DVCCLO1 PARAMETER Input range 56 RECOMMENDED OPERATING CONDITIONS 400 kHz RFAGC at 3.3V. Measured at VGA output with FDC connected. 48-1000 MHz In Pin Diode Atten VGA Output Selectable Preslector Filter 10.9 dB IF Gain Control RF Gain Control Pin Diode Controller FDC ABSOLUTE MAXIMUM RATINGS PARAMETER Supply voltage Storage temperature range Lead temperature (soldering 4 seconds) Lead free temperature (soldering 4 seconds) Input voltage PLL Charge Pump Charge Pump Die Temp Sensor MAX UNIT -40 5.25 +150 V °C +245 °C +250 °C VCC +0.3 V 3-bit AD Serial Bus OOB Tuner MIN -0.3 PLL GPO Loop Filter Buffered Reference Output Loop Filter MT2121 Block Diagram 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 © 1996 - 2005 Microtune, Inc. MT2121 PB-00067 — Rev 1.2 110805 DECEMBER 2005 AFC In/Temp Out