M I C R O T U N E ®

RF SILICON AND SUBSYSTEMS SOLUTIONS

FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS

MT2131 SINGLE-CHIP

TERRESTRIAL TUNER

PRODUCT BRIEF

The MT2131 is a high-performance

single-chip tuner for ATSC and

Digital Cable-Ready ATSC television

receivers and set-top boxes.

The MicroTuner™ MT2131 is an

advanced single-chip terrestrial

tuner, optimized for integrated

digital televisions and ATSC set-top

boxes.

The MT2131 receives

frequencies in the 48 MHz to

1 GHz range and converts a

selected channel to a standard

intermediate frequency (IF)

between 30 MHz and 57 MHz.

The MT2131’s dual-conversion

architecture yields consistent ATSC

A/74 and FCC Digital Cable-Ready

(DCR) compliant performance

without any manual adjustments.

This is achieved via the

combination of Microtune’s

ClearTune technology and an

autonomous automatic gain control

(AGC).

The integrated LNA delivers

excellent sensitivity. The

innovative gain control and power

detector circuits provide superb

terrestrial performance.

The MT2131 has an on-chip

amplifier for Forward Data Channel

(FDC) applications to reduce the

total Bill of Materials (BOM) cost for

a DCR television receiver. It

supports multiple standards

including ATSC, QAM, and NTSC.

In addition, the MT2131 provides

excellent in-band flatness, as well

as consistent gain characteristics

across the complete reception

band for use in digital/analog

televisions, terrestrial set-top boxes

and high-performance PC-TV

applications.

APPLICATIONS

•

NTSC/ATSC front-ends

•

ATSC-only front-ends and

set-top boxes

•

Digital Cable-Ready (DCR)

ATSC integrated digital

televisions

•

ATSC PVRs

•

PC-TVs

•

DVD recorders

FEATURES

•

48 MHz to 1 GHz input

frequency range

•

Integrated front-end bandpass

filtering

•

Integrated RF power

detectors and closed-loop

AGC

•

Programmable RF AGC

•

Single-ended RF input

•

On-chip low-noise amplifier

provides excellent terrestrial

sensitivity

•

Integrated IF variable gain

amplifier for direct connection

to digital demodulators

•

Fully compatible with ATSC,

QAM, and NTSC performance

requirements.

•

Integrated FDC low-pass filter

and buffer amplifier

•

Capable of driving multiple

IF filters

•

Compatible with 3.3 V and

5 V serial bus

•

48 pin, 7 mm X 7 mm QFN

package

MT2131 Single-Chip Tuner