Multimedia Digital Demodulator Copyright © 2012 by Silicon Laboratories 6.8.2012
HDTV MPEG S.o.C.
Si2169
HOST_SCL
HOST_SDA
FRONT
END
OSC
& PLL
nPSK
QAM
DEMOD
S_ADC_IN
S_ADC_IP
S_ADC_QN
S_ADC_QP
ADC (I)
ADC (Q)
EQUAL-
IZER
I
2
C
SWITCH
TUN_SDA
TUN_SCL
GPIOCTRL
MPEG TS
INTERFACE
I
2
C
I/F
MP_C/_D (Sat.)
GPIO_0
RESETB1.2, 3.3V
DSP &
SYNCHRO
DVB-T2/T/C/S/S2
FEC MODULE
OFDM
DEMOD
EQUAL-
IZER
DiSEqC
TM
2.0
DISEQC_IN
DISEQC_OUT
TC_ADC_P
TC_ADC_N
AGCs
ADC
MP_A/_B (T & C)
Ext. Clk or Xtal
Satellite
ZIF Tuner
Silicon Labs
TV Tuner
(Si217x/5x/4x)
CLK_IN_OUT
LDPC BCH
VITERBI RS
TS_ERR/
GPIO_1
TS_SYNC
TS_VAL
8
TS_CLK
TS_DATA
Si2169-A20
Combo DVB-T2/T/C/S/S2 Digital TV Demodulator
Description
The Si2169 integrates DVB-T2, DVB-T, DVB-C, DVB-S, and
DVB-S2 digital demodulators into a single advanced CMOS
technology mixed-signal die for next generation terrestrial,
cable, and satellite TV standards. Leveraging Silicon Labs'
proven digital demodulation architecture, the Si2169
achieves excellent reception performance for each media
while significantly minimizing front-end design complexity,
cost, and power dissipation. Connecting the Si2169 to a
terrestrial and cable hybrid TV tuner or digital only tuner,
such as Silicon Labs’ Si2176/56/46 devices, results in a
high-performance and cost optimized TV front-end solution.
Silicon Labs internally developed DVB-T2 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
signalling parsing, 600
kHz acquisition range, support for all
pilot patterns, and DVB-T2/T auto-detection. The DVB-T and
DVB-C demodulators are enhanced versions of proven and
broadly used Si2161/63/65/67 Silicon Labs devices.
The satellite demodulation functionality allows demodulating
widely deployed DVB-S, DIRECTV™ (DSS) legacy
standards, and next generation DVB-S2 and DIRECTV™
(AMC) satellite broadcasts. A zero-IF interface allows for a
seamless connection to market proven satellite silicon
tuners. Constant coding modulation (CCM), 64800 bits
frame, and single TS (broadcast profile) are the main
specifications of the DVB-S2 demodulator.
The Si2169 offers an on-chip blind scanning algorithm for
DVB-S/S2 and DVB-C standards (as well as blind lock). It
also integrates DiSEqC™ 2.0 LNB interface for satellite dish
control and an equalizer to compensate for echoes in long
cable feeds from the LNB to the satellite tuner RF input.
The Si2169 programmable transport stream interface
provides 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 (ETSI EN 302 755)
-
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)
- NorDig Unified 2.2.1, D-Book 7.0 compliant
- Firmware control (loaded in ROM)
- DVB-T (ETSI EN 300 744)
- COFDM demodulator and FEC decoder
- NorDig Unified 2.2.1, D-Book 7.0 compliant
- DVB-C (ETSI EN 300 429) / ITU J.83 Annex A/C
- QAM demodulator and FEC decoder
- 1 to 7.2 MSymbol/s
- C-Book compliant
- DVB-S2 (ETSI EN 302 307 and TR102-376)
- QPSK/8PSK demodulator and FEC (LDPC) decoder
-
1 to 45 MSymbol/s
- DVB-S (ETSI EN 300 421)
- QPSK demodulator and FEC decoder
- 1 to 45 MSymbol/s
- DiSEqC™ 2.0 interface
- I
2
C serial bus interfaces (master and host)
- Independent differential IF input for T/C tuner and differ-
ential ZIF I/Q inputs for satellite tuner
- GPIOs and multi-purpose ports for independent AGCs
(up to 4) to control satellite and T/C tuners
- 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
- 7x7 mm, QFN-48 pin package, Pb-free/RoHS compliant
Applications
- iDTV: on-board or in a NIM
- Advanced multimedia STB
- PC-TV accessories
- PVR, DVD, and Blu-Ray disc recorders
