Si2158
Worldwide Digital and Analog TV Tuner
Description
The Si2158 is a universal hybrid TV tuner supporting all
worldwide terrestrial and cable TV standards for digital and
analog TV reception. The Si2158 requires no external
balun and offers the lowest-cost BOM for a hybrid TV tuner.
By combining Silicon Labs' proven digital low-IF
architecture with a 4th-generation RF front-end, the Si2158
maintains the highest performance that exceeds
MOPLL-based tuners, including industry-leading 2nd-order
distortion performance.
Compared with competing silicon TV tuners, the Si2158
delivers an unprecedented level of front-end integration,
resulting in the lowest number of external BOM
components. No external tracking filters, wire-wound
inductors, LNAs, SAW filters or inductive power supply
filtering components are needed. The Si2158 offers low
power consumption as well as an option for single or dual
power supply operation. Also included is an internal
power-on reset circuit, eliminating the need for external
brownout protection components or additional pins in
module applications.
For next-generation digital TV broadcast standards, such
as DVB-T2 and DVB-C2, that are sensitive to integrated
phase noise, the Si2158 offers industry-leading phase
noise performance. A software-selectable cable mode is
also included which offers high return-loss performance.
As with prior-generation Silicon Labs TV tuners, the Si2158
delivers superior picture quality and a higher number of
received stations when compared to other silicon tuners
and discrete MOPLL-based tuners. Incorporating
worldwide field testing experience from three previous
tuner generations in high-volume production, the Si2158
delivers the highest tolerance to real-world field reception
conditions.
The
Si2158
also
incorporates
a
harmonic-rejection mixer that delivers excellent immunity
to Wi-Fi and LTE interference across the full RF input
frequency range, with no need for external filtering
components.
Features
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Worldwide hybrid TV tuner
-
Analog TV: NTSC, PAL/SECAM
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Digital TV: ATSC/QAM, DVB-T2/T/C2/C, ISDB-T/C,
DTMB
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42–1002 MHz frequency range
Industry-leading margin to A/74, NorDig, D-Book,
C-Book, ARIB, EN55020, OpenCable™ specifications
Lowest BOM for a silicon hybrid TV tuner
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No balun at RF input
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No external SAW filters or wire-wound inductors
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Integrated LNAs and complete tracking filters
Best-in-class real-world reception
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Exceeds discrete MOPLL-based tuners
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Industry-leading phase noise performance
-
High immunity to Wi-Fi and LTE interference
Low power consumption
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3.3 V and 1.8 V power supplies
-
Single-supply option for 3.3 V-only operation
Integrated power-on reset circuit
Flexible output interface
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Combined ALIF/DLIF output to SoC
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Optional DLIF output to external demodulator
Standard CMOS process technology
4x4 mm, 28-pin QFN package
RoHS compliant
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Applications
Hybrid ½-NIM tuner module
iDTV (Integrated Digital TV)
Hybrid terrestrial and cable STB
Hybrid PVR, DVD and Blu-Ray disc recorder
PC-TV accessories
OUTPUT
INTERFACE
ANTENNA
INPUT
Si2158
PGA
I
ADC
Q
ADC
DSP
DSP
FILTER
ATV
FILTER
DEMOD
AGC
DLIF
AGC
ALIF
RSTB
CONTROL
INTERFACE
SDA
SCL
ADDR
DTV
DEMOD
ATV
DEMOD
PGA
RF
AGC
3.3 V
1.8 V
LDO
0 / 90
IF
AGC
LOW-IF
FREQ
SYNTH
AV
SoC
XOSC
XTAL_O
XTAL_I
XOUT
GPIO
Hybrid TV Tuner
Copyright © 2012 by Silicon Laboratories
6.25.2012
TI Technology Forum
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