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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.
MT2068 Single-Chip Broadband Tuner
The MicroTunerTM 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 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. 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 loopthrough
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 dualconversion 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
PRELIMINARY
*
MT2068 SINGL E-C HIP BRO ADB AND TU N ER
PRODUCT BRIEF
RECOMMENDED OPERATING CONDITIONS
PARAMETER Supply voltage Supply voltage ripple Operating junction temperature VGA load impedance Serial control clock 200 400 MIN 3.15 TYP 3.3 MAX 3.45 25 100 UNIT V mVp-p C kHz
TUNER ELECTRICAL CHARACTERISTICS
PARAMETER Power supply Active current RF signal path Input frequency range Return loss Noise figure at max gain Voltage gain RS = 75 48 8 9.5 42 29 60 -84 -106 50 30 37 60 2.0 1000 MHz dB dB dB dB dBc dBc/Hz dBc/Hz kHz MHz Vp-p dB 257 mA MIN TYP MAX UNIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER Supply voltage Storage temperature range Lead-free temperature (soldering 5 seconds) Input voltage -0.3 -40 MIN MAX 3.6 150 245 VCC +0.3 UNIT V C C V
RF AGC range Image rejection LO phase noise (10 kHz) LO phase noise (100 kHz) LO step size IF VGA Frequency Range Output voltage AGC range
DNCVCC
UPCVCC
UPCVCC
40
39
38
37
36
35
34
33
32
RFIN
1 2 3 4 5 6 7 8 9 10
31
VGAINP
RFCAP
DNCN
DNCP
GND
NC
GND
30 29 28 27
VGAINN VGAVCC VGAOUTP VGAOUTN IFAGC LO2AVCC LO2REG LO2TN
PRELIMINARY
NC UPCVCC NC LO1AVCC LO1REG LO1T1 LO1T2P LO1T2N LO1LPF
SIF RFin ATN UPC FIFF DNC
36 - 57 MHz SAW VGA SIF IFAGC
Exposed paddle on package bottom
26 25 24 23 22 21
RFPM LO1 GCU
FCU LO2
IFPM
LO2TP LO2LPF
SER
SRO
SRO Buf
11
12
13
14
15
16
17
18
19
20
SRON
SERADDR
LO1DVCC
SERCLK
GPIO
LO2DVCC
VCC
SERDATA
SROout
SROP
CLK Data
GPIO
4.8 or 16 MHz 16 MHz
MT2068 Pin Diagram
MT2068 Block Diagram
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 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, ClearTune, 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; 5,737,035C1; 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; 6,919,774; 6,920,182; 6,922,556; 6,963,478; 6,973,288; 6,993,310; 7,035,614; 7,039,062; 7,078,960; 7,079,195; 7,119,834; 7,164,899; 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 filed. Entire contents Copyright (c) 1996 - 2008 Microtune, Inc. 011108
MT2068 PB-00152 -- Rev 1.1
May 2008

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