RF SILICON AND SUBSYSTEMS SOLUTIONS
FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS
MT2022 SINGLE-CHIP
MoCA™-COMPATIBLE
BROADBAND TUNER
PRODUCT BRIEF
The MT2022 is a single-chip broadband
tuner designed for superior
performance with MoCA systems.
MT2022 Single-Chip Broadband Tuner
The MicroTuner MT2022 is an
advanced single-chip broadband
tuner that has been optimized for
high-performance analog and digital
cable set-top boxes that require low
composite distortion and noise under
fully loaded (174 channels) cable
environments. It is capable of
receiving frequencies in the 48 MHz
to 1.1 GHz range and of converting
a selected channel to an
intermediate frequency (IF).
The MT2022’s low close-in phase
noise allows it to be used for both
digital and analog video signals. Its
dual-conversion architecture, with no
requirement for tracking filters, yields
the desirable characteristics of
traditional cable television tuners:
controlled input impedance across
the input band, low in-band
emissions, and good selectivity.
The device is highly integrated,
with on-chip components including a
low noise amplifier (LNA), a first
mixer that up-converts the input
spectrum to a first IF of 1690 MHz,
an image-reject mixer that
downconverts the filtered first IF
spectrum to a standard second IF, a
buffer amplifier for the IF output, an
IF variable gain amplifier, and a
serial interface to program the
device as well as read back its
status.
On-chip phase-locked loops
(PLLs) and voltage-controlled
oscillators (VCOs) create a fully
integrated frequency synthesis
system, which runs off a single
external crystal. The use of high First
Intermediate Frequency (FIF) allows
unhindered transmission of
Multimedia over Coax Alliance
(MoCA) band signals. The image-
reject mixer provides excellent
image rejection and eases the
requirements of the first IF filter.
APPLICATIONS
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DSG in cable STBs
All-digital cable STBs
FEATURES
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The MT2022 features many
advantages including:
On-chip amplifier for Forward
Data Channel (FDC), which
reduces bill of materials
(BOM) cost while improving
performance vs. solutions
using a directional coupler.
1.1 GHz bandwidth
Ease of multi-tuner front-end
implementations
Proven performance in dual-
function digital STB designs
Eliminates the need for the
28V to 33V supplies typically
required by traditional tuners
3.3V and 5V serial bus
compatible
Minimal external components
No manually tuned parts
required
Simple interface to external
filters
Software shutdown mode
Intermediate frequency (IF)
output fully compatible with
demodulators for DSG,
DAVIC, DVB-C, DOCSIS™,
EuroDOCSIS™, and other
standards
Can be used in conjunction
with Microtune’s upstream
amplifiers to create a
complete RF front end for bi-
directional STB applications
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PRELIMINARY
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MICROTUNE [ MICROTUNE,INC ]
