Digital Terrestrial Set Top Box Tuner Copyright © 2015 by Silicon Laboratories

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LOW-IF

FREQ

SYNTH

LDO

XOSC

PGA

Si2124

ANTENNA

INPUT

DSP

FILTER

AGC

DTV

DEMOD

AV

SoC

ADDR

SCL

SDA

LIF

IF

AGC

RF

AGC

PGA

RF OUT

ZPS

LOOP THROUGH

3.3 V

1.8 V

1.8 V

Si2124

Digital Terrestrial Set-Top Box Tuner

Description

Built upon six generations of field-proven TV tuner

technology, the Si2124 is Silicon Labs’ first digital set-top

box (STB) tuner designed specifically for digital terrestrial

STB applications. Like the previous generations of Silicon

Labs' digital TV tuners, the Si2124 maintains very high

linearity and low phase noise to deliver superior picture

quality compared to competing silicon tuners.

Available in an industry-leading 3x3 mm QFN package, the

Si2124 delivers the lowest-cost, most design-friendly and

area-efficient digital terrestrial STB solution available today.

A fully-integrated RF front-end eliminates the need for an

external balun, LNAs, SAW filters, and inductive power

supply

filtering.

Also

included

is

a

fully-integrated

loop-through function with a zero-power mode switch

(ZPS) for additional board area and BOM savings. An

on-chip 1.8 V LDO enables single-supply operation, while

a dual-supply option offers additional system flexibility. The

Si2124’s excellent immunity to LTE interference and

harmonic rejection mixer with outstanding immunity to

Wi-Fi interference eliminate the need for external filtering.

For advanced digital broadcast standards with high-order

constellations, such as DVB-T2, the Si2124's superior

integrated phase noise delivers industry-leading reception

performance.

The Si2124 delivers a higher number of received stations

compared to other silicon tuners. Incorporating worldwide

field experience from prior generations of digital tuners in

mass production, the Si2124 delivers the highest tolerance

to real-world reception conditions.

Features

nel bandwidths

operation

Applications