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RF SILICON AND SYSTEMS SOLUTIONS FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS
MT2050 SINGLE-CHIP BROADBAND TUNER
PRODUCT BRIEF
The MT2050 is a 5.0V single-chip broadband tuner with an integrated IF variable gain amplifier.
MT2050 Single-Chip Broadband Tuner
The MT2050 is an advanced single-chip broadband tuner that has been optimized for high performance cable modems and digital cable set-top boxes 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 dual-conversion 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.
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.
* * * * *
MICROTUNE
*
M T2 0 5 0 SIN G L E- C HIP B R O ADB A ND T UN E R
PRODUCT BRIEF
RECOMMENDED OPERATING CONDITIONS
VCCmx1 VCCmx2 MIX1on VLNAip MIX1op DNC VCCfga 38 VCClna MIX2ip MIX2in GPO2
Input frequency range First intermediate center frequency Second intermediate center frequency (programmable) Supply voltage Supply voltage ripple Operating junction temperature VGA output load impedance Serial control clock
48 1220 30 4.75 5
860
MHz MHz
46
43
41
40
39
47
45
44
42
60 5.25 15 100
MHz V mV C kHz
VLNAin VCClna DAGCin AVCClo1 LO1tk1 LO1tk2 LO1reg DVCClo1
1 2 3 4 5 6 7 8 9 10 11 12
37
48
DNC
PARAMETER
MIN
TYP
MAX
UNIT
36 35 34 33 32
FGAop FGAon AVCClo2 LO2tk LO2reg LO2lpf DNC DVCClo2 GPO1 DNC VGAip VGAin
300 400
Exposed Die Attach Paddle on Package Bottom
31 30 29 28 27 26 25
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply voltage Storage temperature range Lead temperature (soldering, 4 seconds) Lead-free temperature (soldering, 5 seconds) Input voltage -0.3 -40
LO1lpf
MIN
MAX
6 +150 +245 +260 VCC +0.3
UNIT
V C C C V
GPO0 DNC SERca
20
13
14
15
18
19
21
22
SERscl
SERen
SERsda
16
DNC
VCC
17
23 VCCvga
GPADin
MT2050 Pin Diagram
ELECTRICAL CHARACTERISTICS
PARAMETER
Power Supply Active current Shut-down current Return loss Noise figure, max gain RF AGC range VGA AGC range LO1 Phase noise (10 kHz) Phase noise (100 kHz) L02 Phase noise (10 kHz) Phase noise (100 kHz)
MIN
TYP
325 35 10 7.3
MAX
UNIT
mA mA dB dB dB dB dBc/Hz dBc/Hz dBc/Hz dBc/Hz
RF INPUT
VGActrl
SROn
SROp
VGAop
VGAon
24
MIX 1
MIX 2
IF OUTPUT FGA VGA L02
30 30 -86 -109 -94 -114
L01
PLL
PLL
SRO
SERIAL CONTROL INTERFACE
SERIAL DATA CLOCK
MT2050 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; 6,144,402; 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; D469,742; 6,535,068; 6,580,313; 6,608,522; 6,631,257; 6,674,409; 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; 6,920,182; 6,963,478; 6,973,288; D,469,742; DE10,011,662 and additional patents pending or filed. Entire contents Copyright (c) 1996 - 2006 Microtune, Inc. 121505
MT2050 PB-00038 -- Rev 1.2
March 2006

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