Si2178
Worldwide Digital and Analog TV Tuner
with Analog Demodulator
Description
The Si2178 integrates a PAL/SECAM/NTSC analog TV
demodulator with a universal hybrid TV tuner supporting all
worldwide digital and analog TV standards. The Si2178
requires no external balun and offers the lowest-cost BOM
for a hybrid TV tuner with analog demodulator. By
combining Silicon Labs' proven digital low-IF architecture
with a 4th-generation RF front-end, the Si2178 maintains
the highest performance that exceeds MOPLL-based
tuners, including industry-leading 2nd-order distortion
performance.
Compared with competing silicon TV tuners, the Si2178
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 Si2178 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 Si2178 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 Si2178
delivers superior picture quality and a higher number of
received stations when compared to other silicon tuners
and discrete MOPLL-based tuners. Both the tuner and
analog demodulator incorporate worldwide field testing
experience from three previous generations in high-volume
production, to deliver the highest tolerance to real-world
field reception conditions. The Si2178 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.
ANTENNA
INPUT
Features
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Worldwide hybrid TV tuner
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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
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Analog TV demodulator
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Superior video SNR performance
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Overmodulation and ICPM tolerant
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Industry-leading margin to A/74, NorDig, D-Book,
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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
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High immunity to Wi-Fi and LTE interference
Low power consumption
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3.3 V and 1.8 V power supplies
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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
1/2-NIM, 3/4-NIM, and full-NIM tuner module
iDTV (Integrated Digital TV)
Hybrid terrestrial and cable STB
Hybrid PVR, DVD and Blu-Ray disc recorder
PC-TV accessories
AGC
OUTPUT
INTERFACE
DLIF
CVBS
SIF
RSTB
CONTROL
INTERFACE
LOW-IF
SDA
SCL
ADDR
AV
SoC
Si2178
PGA
I
ADC
Q
ADC
DSP
DSP
FILTER
FILTER
ATV
DEMOD
DTV
DEMOD
PGA
RF
AGC
3.3 V
1.8 V
LDO
0 / 90
IF
AGC
FREQ
SYNTH
XOSC
XTAL_O
XTAL_I
XOUT
GPIO
Hybrid TV Tuner
Copyright © 2012 by Silicon Laboratories
6.25.2012
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