Dual Digital Demodulators Copyright © 2015 by Silicon Laboratories 10.29.2015
I2C Block_A
DEMODULATOR_A CORE
DiSEqC_A
ADC_A
ADC_A
ADC_A
HDTV MPEG S.o.C.
Si21672B
SCL_HOST
SDA_HOST
RESETB1.2, 3.3V
GPIO1/TS_ERR_A
TS_SYNC_A
TS_VAL_A
8
TS_CLK_A
TS_DATA_A
DiSEqC_IN_A_B
SDA_MAST
SCL_MAST
XO
XTAL_I/CLK_IN
CLK_IN/OUT
I2C Block_B
DEMODULATOR_B CORE
DiSEqC_B
ADC_B
ADC_B
ADC_B
DiSEqC_OUT_A
DiSEqC_CMD
TC_ADC_P_A
TC_ADC_N_A
S_ADC_IN_A
S_ADC_IP_A
S_ADC_QN_A
S_ADC_QP_A
Dual Satellite
Tuner
TC_ADC_N_B
TC_ADC_P_B
S_ADC_QP_B
S_ADC_QN_B
S_ADC_IP_B
S_ADC_IN_B
DiSEqC_OUT_B
MP_C_A
MP_A_A
MP_B_B
MP_D_B
GPIO0/TS_ERR_B
TS_SYNC_B
TS_VAL_B
8
TS_CLK_B
TS_DATA_B
ADDR_A
ADDR_B
TV Tuner
TV Tuner
Si21672-B22
Dual DVB-T/C/S/S2 Digital TV Demodulator
Description
The Si21672-B integrates two separate high-performance
DVB-T, DVB-C, DVB-S, and DVB-S2 digital demodulators into
a single compact package for terrestrial, cable, and satellite
TV standards. Leveraging Silicon Labs' proven digital
demodulation architecture, each embedded demodulator
achieves excellent reception performance for each media
while significantly minimizing front-end design complexity and
cost. Connecting the Si21672-B to both a dual terrestrial/
cable TV tuner, and a dual satellite tuner, results in a
high-performance and cost optimized TV front-end solution.
The DVB-T and DVB-C demodulators are enhanced versions
of p
rov
en and broadly used Si2167/68/69 Silicon Labs
devices. Furthermore, ITU J.83 Annex B is also supported for
US and South American cable networks. The IF input
supports standard IF (36 MHz) or low-IF.
The satellite demodulation functionality allows demodulating
wi
del
y deployed DVB-S, DIRECTV™ (DSS) legacy
standards, and DVB-S2 (AMC compliant)) satellite
broadcasts. A zero-IF interface allows for a seamless
connection to market proven satellite silicon tuners.
The Si21672-B offers an on-chip blind scanning algorithm for
DV
B-
S/S2 and DVB-C standards (as well as blind lock). It
also integrates two DiSEqC™ 2.0 LNB interfaces for satellite
dish control and, for each satellite demodulator, an equalizer
to compensate for echoes in long cable feeds from the LNB to
the satellite tuner RF input.
The Si21672-B embeds two independent programmable
tra
n
sport stream interfaces which provide a flexible range of
output modes and are fully compatible with all MPEG
decoders or conditional access modules to support any
customer application.
Features
- DVB-T (ETSI EN 300 744)
- COFDM demodulator and enhanced FEC decoder
- NorDig Test Spec 2.2.2, D-Book 7 V3 compliant
- 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
- DVB-S2 (ETSI EN 302 307 and TR102-376)
-
QPSK/8PSK demodulator and FEC decoder
-
Broadcast profile: CCM, 64800 bits frame, single TS
-
1 to 45 MSymbol/s
-
DIRECTV™ AMC compatible
- DVB-S (ETSI EN 300 421) and DSS supported
- QPSK demodulator and enhanced FEC decoder
- 1 to 45 MSymbol/s
- Dual DiSEqC™ 2.x interface, Unicable support
- I
2
C serial bus interfaces (master and host)
- Dual independent differential IF input for T/C tuners and
differential ZIF I/Q inputs for satellite tuners
- GPIOs and multi-purpose ports (two per demodulator)
- Firmware control for upgradeability
- Separate flexible TS interfaces with serial or parallel
outputs
- Fast lock times for all standards
- Only two power supplies: 1.2 and 3.3 V
- 8x8 mm, QFN-68 pin package, Pb-free/RoHS compliant
- Pin-to-pin compatible with all dual demodulator family:
Si216x2
- API compatible with all single and dual demodulator
families
Applications
- Multi-receiver iDTV: on-board or in a NIM
- Advanced multimedia PVR STBs
- PC-TV accessories
- PVR, DVD, and Blu-Ray disc recorders
