Description
The Si21672D integrates two separate high-performance digital
demodulators for the DVB-T/C, DVB-S2/S and DVB-S2X
standards into a single compact package. Leveraging Skyworks'
proven digital demodulation architecture, the Si21672D achieves
excellent reception performance for each media while significantly
minimizing front-end design complexity, cost, and power
dissipation. Connecting the Si21672D 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, including ITU-T J.83 annex B,
demodulators are enhanced versions of proven and broadly used
Si2164/67/68/69 Skyworks devices.
The satellite reception allows demodulating widespread DVB-S,
DIRECTV™ (DSS), DVB-S2, DIRECTV™ (AMC) legacy
standards, and new Part II of DVB-S2 (S2X) satellite broadcast
standard. A zero-IF interface (differential) allows for a seamless
connection to market proven satellite silicon tuners. 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 Si21672D offers an on-chip blind scanning algorithm for DVBS/
S2/S2X and DVB-C standards, as well as blind lock function.
The Si21672D embeds two independent programmable transport
stream interfaces which provide a flexible range of output modes,
including a cross-bar functionality, and are fully compatible with all
MPEG decoders or conditional access modules to support any
customer application.

Features
- Pin-to-pin compatible with all dual demodulator family: Si216x2
and Si218x2
- API compatible with all single and all dual demodulators
- DVB-T (ETSI EN 300 744)
- NorDig Unified 2.5, D-Book 8 compliant
- DVB-C (ETSI EN 300 429) / ITU-T J.83 Annex A/B/C
- 1 to 7.2 MSymbol/s, C-Book compliant
- DVB-S2 (ETSI EN 302 307-1 V1.4.1)
- QPSK/8PSK demodulator
- DVB-S2X (ETSI EN302 307-2 V1.1.1)
- QPSK/8PSK, 8/16/32APSK demodulator
- Roll-off factors from 0.05 to 0.35
- Channel bonding for TS transmission supported
- DVB-S (ETSI EN 300 421) and DSS supported
- Dual DiSEqC™ 2.x interface, Unicable support
- 1 to 45 MSps for all satellite standards
(<40 MSps in 32APSK)
- I2C serial bus interfaces (master and host)
- Upgradeable with firmware patch download via fast SPI or I2C
(broadcast mode supported)
- 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)
- Separate flexible TS interfaces with serial or parallel
outputs and cross-bar feature
- 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