Digital Demodulator Copyright © 2013 by Silicon Laboratories 8.12.2013
HDTV MPEG S.o.C.
Si2168
HOST_SCL
HOST_SDA
I
2
C
SWITCH
TUN_SDA
TUN_SCL
GPIOCTRL
I
2
C
I/F
GPIO_0
RESETB1.2, 3.3V
DSP &
SYNCHRO
FRONT
END
OSC
& PLL
DVB-C
DEMOD
EQUAL-
IZER
VITERBI
RS
MPEG TS
INTERFACE
TS_SYNC
TS_VAL
TS_CLK
LDPC BCH
DVB-T2/T/C
FEC MODULE
DVB-T2/T
DEMOD
EQUAL-
IZER
TC_ADC_P
TC_ADC_N
ADC
Silicon Labs
TV Tuner
(Si217x/5x/4x)
AGCs
MP_A/_B/_C/_D
Ext. Clk or Xtal
CLK_IN_OUT
TS_ERR/
GPIO_1
8
TS_DATA
Si2168-B40
DVB-T2/T/C Digital TV Demodulator
Description
The Si2168B integrates DVB-T2, DVB-T, and DVB-C digital
demodulators into a single advanced CMOS technology
mixed-signal die for next generation terrestrial and legacy
cable TV standards. Leveraging Silicon Labs' proven digital
demodulation architecture, the Si2168B achieves excellent
reception performance while significantly minimizing
front-end design complexity, cost, and power dissipation.
Connecting the Si2168 to a terrestrial and cable hybrid TV
tuner or digital only tuner, such as Silicon Labs’ Si2178/58/
48 devices, results in a high performance and cost
optimized TV front-end solution.
Silicon Labs internally developed DVB-T2, including
T2
-L
ite, demodulator can accept a standard IF (36 MHz) or
low-IF
input and support all modes specified by the
DVB-T2 standard. Main features of the DVB-T2 mode are
256 QAM with rotated constellations, SISO and MISO
support, FEF management, fully autonomous signal
acquisition including automatic L1 signaling parsing,
600 kHz acquisition range, support for all pilot patterns,
and
DVB-T/T2
auto-detection. The DVB-T and DVB-C
demodulators are enhanced versions of proven and
broadly used Si2167B/68/69 Silicon Labs devices.
The Si2168B offers an on-chip blind scanning algorithm for
the DVB-C st
andards as well as blind lock. The Si2168B
can use a crystal, as a reference clock, or be driven by an
external clock signal from the tuner.
The Si2168B programmable transport stream interface
provid
es a
flexible range of output modes and is fully
compatible with all MPEG decoders or conditional access
modules to support any customer application.
Features
- DVB-T2 and T2-Lite (ETSI EN 302 755-V1.3.1)
- COFDM demodulator and FEC (LDPC + BCH)
decoder
- Bandwidth: 1.7, 5, 6, 7 or 8 MHz (and extended BW)
- Supports up to 255 PLP(s) and outputs the data PLP
plus the common PLP on a single TS
- Scrambling of L1 post-signaling supported
- NorDig Unified v2.4 and D-Book 7 V2 compliant
- Firmware control (loaded in ROM)
- DVB-T (ETSI EN 300 744)
- COFDM demodulator and enhanced FEC decoder
- NorDig Unified 2.4, D-Book 7 V2compliant
- DVB-C (ETSI EN 300 429) / ITU J.83 Annex A/B/C
- QAM demodulator and FEC decoder
- 1 to 7.2 MSymbol/s
- C-Book compliant
- I
2
C serial bus interfaces (master and host)
- GPIOs and multi-purpose ports for independent AGCs
- Firmware control for upgradeability
- Flexible TS interface with serial or parallel single output
- Fast lock times for all standards including DVB-T2
- Only two power supplies: 1.2 and 3.3 V
- Pin-to-pin and software compatibility with the Si2168
and Si2164/62/60/66B/67B/69B
- 7x7 mm, QFN-48 pin package, Pb-free/RoHS compliant
Applications
- iDTV: on-board or in a NIM
- Advanced STB
- PC-TV accessories
- PVR, DVD, and Blu-Ray disc recorders
