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M I C R O T U N ETM
MT2050 SINGLE-CHIP BROADBAND TUNER
CABLE MODEM TUNER AND DIGITAL SET-TOP BOX APPLICATIONS
APPLICATIONS
* * * Cable modems / voiceenabled cable modems Digital set-top boxes (STB) Home gateways
Preliminary and Confidential
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 The MT2050 is an advanced single-chip broadband tuner that has been optimized for high performance cable modems and digital cable STBs 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 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.
MT2050 Tuner
* * * * *
*
Product Brief
MT2050 SINGLE-CHIP BROADBAND TUNER PRODUCT BRIEF
PIN DIAGRAM
VCCmx1 VCCmx2 VCCfga MIX1on VCClna VLNAip MIX1op MIX2ip GPO2 DNC MIX2in DNC
CABLE MODEM TUNER AND DIGITAL SET-TOP BOX APPLICATIONS
ELECTRICAL CHARACTERISTICS
PARAMETER
Power Supply Active current Shut-down current Upconversion Input frequency range Return loss First IF center frequency Noise figure, max gain Terminal voltage gain AGC range Gain variation at any frequency OIP3 Downconversion Input frequency range Noise figure Terminal voltage gain Image rejection OIP3 LO1 LO frequency LO step size Phase noise (10 kHz) Phase noise (100 kHz) Spurious LO2 LO frequency LO step size Phase noise (10 kHz) Phase noise (100 kHz) Spurious IF VGA Frequency range Output voltage Terminal voltage gain Noise figure, max gain OIP3 Serial Interface Serial clock frequency VIH VIL
MIN
TYP
325 40
MAX
UNIT
mA mA
45
44
41
40
48
47
46
43
42
39
38
VLNA VLNAin VCClna DAGCin AVCClo1 LO1tk1 LO1tk2 LO1reg DVCClo1 LO1lpf GPO0 DNC SERca 1 2 3 4 5 VCO1 6 LO2 PLL 7 8 9 10 SER 11 12 SRO Temp IF VGA A/D 26 25 VGAip VGAin Charge Pump Charge Pump 31 30 29 28 27 LO2lpf DNC DVCClo2 GPO1 DNC FGA MIX1 MIX2 PKDET 36 35 34 33 32 FGAop FGAon AVCClo2 LO2tk LO2reg
37
48 9.5 1220 7 18 30 -3 68 72 1220 10 29 33 79
860
LO1 PLL
VCO2
+3
MHz dB MHz dB dB dB dB dBmV MHz dB dB dBc dBmV
Preliminary and Confidential
28 77 1268
21
18
19
22
15
20
23
13
14
16
17
24
SERen
SERsda
SERscl
DNC
VCC
VGAop
VGAon
SROn
SROp
VCCvga
GPADin
VGActrl
2080 1 -86 -109 -60
RECOMMENDED OPERATING CONDITIONS
PARAMETER
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 300 400
MHz kHz dBc/Hz dBc/Hz dBc MHz kHz dBc/Hz dBc/Hz dBc MHz Vp-p dB dB dBmV kHz V V
MIN
48
TYP
1220
MAX
860
UNIT
MHz MHz
1160 50 -94 -114
1190
30 4.75 5
60 5.25 15 100
MHz V mV C kHz
-60 30 1.0 12.5 12.5 76 400 2.3 1.5 51.5 60
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply voltage Storage temperature range Lead temperature (soldering, 4 seconds) Input voltage -0.3 -40
MIN
MAX
6 +150 +245 VCC +0.3
UNIT
V C C V
Worldwide Headquarters * 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, MicroTuner, MicroStreamer, VideoCaster, 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; 6,177,964; 6,218,899 and additional patents pending or filed. Entire contents Copyright (c) 2002 Microtune, Inc.
PB-00038 Rev 1.0 -- April 2002 Page 2 of 2

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