​Si21692/682-D Dual Digital TV Demodulators 

Each of the Si21692/682-D dual demodulators integrate two separate high-performance single demodulators in a compact 8 x 8 mm QFN package. The Si21692/682-D support DVB-T2/S2X/S2/T/C/S and DVB-T2/T/C, respectively. 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 Si21692/682-D to both a dual terrestrial/cable TV tuner, and a dual satellite tuner, results in a high-performance and cost optimized dual-channel TV or STB front-end solution.

Silicon Labs’ internally-developed DVB-T2 (including T2-Lite) demodulators support all modes specified by the DVB-T2 standard (V1.3.1). Main features of the DVB-T2 mode are, SISO and MISO support, FEF management, fully autonomous signal acquisition including automatic L1 signaling parsing 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 Si2167/68/69 Silicon Labs devices. The satellite demodulation functionality allows demodulating widespread DVB-S, DIRECTV™ (DSS), DVB-S2 and DIRECTV™ (AMC) legacy standards, as well as new Part II of DVB-S2 (S2X) satellite broadcast standard. A zero-IF interface allows for a seamless connection to market proven satellite silicon tuners.

The Si216x2 offers an on-chip blind scanning algorithm for DVB-S2X/S2/S 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 Si216x2 embeds two independent programmable transport stream interfaces which provide a flexible range of output modes, including a TS cross-bar functionality, and are fully compatible with all MPEG decoders or conditional access modules to support any customer application.

 

Features

  • DVB-T2 (ETSI EN 302 755-V1.3.1) and T2-Lite (Annex 1)
  • Bandwidth: 1.7, 5, 6, 7 or 8 MHz (and extended BW)
    • Scrambling of L1 post signaling supported
    • FEF management
    • NorDig Unified 2.4, D-Book 7 V3 compliant
  • DVB-S2 (ETSI EN 302 307-1)
    • QPSK/8PSK demodulator
  • DVB-S2X (ETSI EN 302 307-2)
    • QPSK/8PSK, 8/16/32APSK demodulator
    • Roll-off factors from 0.05 to 0.35
  • DVB-C (ETSI EN 300 429) and ITU-T J.83 Annex A/B/C
    • QAM demodulator and FEC decoder
    • 1 to 7.2 M Symbol(s)
  • DVB-T (ETSI EN 300 744)
    • OFDM demodulator and enhanced FEC decoder
    • NorDig Unified 2.4, D-Book 7 V3 compliant
  • DVB-S (ETSI EN 300 421) and DSS
  • LDPC and BCH decoding for T2 and S2X/S2 standards
  • 1 to 45 MSymbol/s for all satellite standards (<40 MSps in 32APSK)
  • Dual DiSEqC™ 2.x interface, Unicable support
  • Enhanced immunity to co-channel interferers
  • I2C 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, and cross-bar feature
  • Fast lock times for all media
  • Only two power supplies: 1.2 and 3.3 V
  • 8 mm x 8 mm, QFN68 package, Pb-free/RoHS compliant
  • Pin-to-pin compatible with Si216x2/8x2 dual demods family
  • API compatible with all single and dual demods families

Si21692/682 Product Matrix

Devices
Part Number Data Sheet Description
Si21682
Dual Digital Demodulator
Si21692
Dual Digital Demodulator
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