​Si21832/822/812/802 Dual ISDB-T Digital Demodulators 

Each of the Si218x2 dual demodulators integrates two separate high-performance single demodulators in a compact 8 x 8 mm QFN package. The Si21832/822/812/802 supports ISDB-T and DVB-T2/C2/S2X/S2/T/C/S, DVB-T2/S2X/S2/T/C/S, DVB-S2X/S2/T/C/S and DVB-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 Si218x2 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’ multi-standard demodulator can accept a standard IF (36 MHz) or low-IF input for terrestrial and cable standards. The ISDB-T demodulator supports all modes specified by current ABNT NBR 16.601 and ABNT NBR 15.604 specifications. The main features of the ISDB-T mode are three layers decoding, TMCC decoding, support for differential demodulation, partial reception decoding, and AC1, AC2 decoding. The DVB-T2 demodulator supports all modes specified by current DVB-T2-V1.3.1 standard. The main features of the DVB-T2 and T2-Lite modes are 256 QAM with rotated constellations, SISO and MISO support, FEF management, fully autonomous signal acquisition including automatic L1 signaling parsing, scrambling of L1 post-signaling, 600 kHz acquisition range, support for all pilot patterns, and DVB-T2/T auto-detection.

The Si218x2 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 Si218x2 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-C2 (ETSI EN 302 769)
    • 16-QAM to 4096-QAM OFDM demodulation
    • 6 MHz and 8 MHz bandwidth, Notch management
  • DVB-T2 (ETSI EN 302 755-V1.3.1) and T2-Lite (Annex I)
    • 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)
  • ISDB-T (ABNT NBR 16.601 and 15.604)
    • 6, 7, and 8 MHz bandwidth
    • Partial reception supported
    • AC1 and AC2 decoding
  • 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/C2 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, including 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

Si21832/822/812/802 Product Matrix

Devices
Part Number Data Sheet Description
Si21802
Dual ISDB-T and DVB-T/C Digital Demodulator
Si21812
Dual ISDB-T and DVB-S2X/S2/T/C/S Digital Demodulator
Si21822
Dual ISDB-T and DVB-T2/S2X/S2/T/C/S Digital Demodulator
Si21832
Dual ISDB-T and DVB-T2/C2/S2X/S2/T/C/S Digital Demodulator
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