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Microtune
Microtune

MT2050 Datasheet Preview

MT2050 Datasheet

CABLE MODEM TUNER AND DIGITAL SET-TOP BOX APPLICATIONS

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MT2050 pdf
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M I C R O T U N E™
MT2050 SINGLE-CHIP BROADBAND TUNER
CABLE MODEM TUNER AND DIGITAL
SET-TOP BOX APPLICATIONS
APPLICATIONS
Cable modems / voice-
enabled 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
MT2050 Tuner
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 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.
Product Brief



Microtune
Microtune

MT2050 Datasheet Preview

MT2050 Datasheet

CABLE MODEM TUNER AND DIGITAL SET-TOP BOX APPLICATIONS

No Preview Available !

MT2050 pdf
MT2050 SINGLE-CHIP BROADBAND TUNER
PRODUCT BRIEF
CABLE MODEM TUNER AND
DIGITAL SET-TOP BOX APPLICATIONS
PIN DIAGRAM
VLNAin 1
VCClna 2
DAGCin 3
AVCClo1 4
LO1tk1 5
LO1tk2 6
LO1reg 7
DVCClo1 8
LO1lpf 9
GPO0 10
DNC 11
SERca 12
VLNA
MIX1
MIX2
VCO1
Charge
Pump
LO1 PLL
LO2 PLL
SER
Temp
SRO
A/D
FGA
PKDET
VCO2
Charge
Pump
IF VGA
36 FGAop
35 FGAon
34 AVCClo2
33 LO2tk
32 LO2reg
31 LO2lpf
30 DNC
29 DVCClo2
28 GPO1
27 DNC
26 VGAip
25 VGAin
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
MIN
48
30
4.75
300
TYP
1220
5
MAX
860
60
5.25
15
100
400
UNIT
MHz
MHz
MHz
V
mV
°C
kHz
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply voltage
Storage temperature range
Lead temperature (soldering, 4
seconds)
Input voltage
MIN
-40
-0.3
MAX
6
+150
+245
VCC +0.3
UNIT
V
°C
°C
V
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
48
30
-3
68
28
77
1268
1160
30
12.5
76
2.3
TYP
325
40
9.5
1220
7
18
72
1220
10
29
33
79
1
-86
-109
50
-94
-114
1.0
12.5
MAX UNIT
mA
mA
860 MHz
dB
MHz
dB
dB
dB
+3 dB
dBmV
MHz
dB
dB
dBc
dBmV
2080
-60
MHz
kHz
dBc/Hz
dBc/Hz
dBc
1190
-60
MHz
kHz
dBc/Hz
dBc/Hz
dBc
60
51.5
MHz
Vp-p
dB
dB
dBmV
400 kHz
V
1.5 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 © 2002 Microtune, Inc.
PB-00038
Rev 1.0 — April 2002
Page 2 of 2


Part Number MT2050
Description CABLE MODEM TUNER AND DIGITAL SET-TOP BOX APPLICATIONS
Maker Microtune
Total Page 2 Pages
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