Digital Terrestrial Set Top Box Tuner Copyright © 2015 by Silicon Laboratories 4.3.15
I
ADC
Q
ADC
0 / 90 LOW-IF
FREQ
SYNTH
LDO
OUTPUT
INTERFACE
XOSC
XTAL_I
PGA
CONTROL
INTERFACE
XTAL_O
XOUT
Si2124
ANTENNA
INPUT
GPIO
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
- Digital terrestrial STB tuner
- ATSC, DVB-T2/T, ISDB-T
- 1.7 MHz, 6 MHz, 7 MHz, 8 MHz, and 10 MHz chan-
nel bandwidths
- Conforms to Nordig, DTG, and ARIB
- Lowest BOM for a digital terrestrial STB tuner
- No balun, SAW filters, or wire-wound inductors
- Integrated loop-through with zero-power mode
- Integrated LNAs and complete tracking filters
- Best-in-class real-world reception
- Industry-leading phase noise performance
- High immunity to Wi-Fi and LTE interference
- Low power consumption
- 3.3 V and 1.8 V power supplies
- Integrated 1.8 V LDO for 3.3 V single-supply
operation
- Single Low-IF (LIF) output to SoC and/or demodulator
- Standard CMOS process technology
- Smallest footprint for a silicon digital TV tuner
- 3x3 mm, RoHS-compliant 24-pin QFN
Applications
- Digital tuner modules
- Digital terrestrial STB
- Digital PVR, DVD and Blu-Ray disc recorder
