Si2169-D DVB-T2/S2X/S2/T/C/S Digital Demodulator 

The Si2169-D integrates DVB-S, DVB-S2 and DVB-S2X 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-D achieves excellent reception performance for each media while significantly minimizing front-end design complexity, cost and power dissipation. Connecting the Si2169-D to a terrestrial and cable hybrid TV tuner or digital only tuner, such as Silicon Labs’ new Si2177, Si2151 and Si2141 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 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 signaling parsing, 600 kHz acquisition range, support for all pilot patterns and DVB-T/T2 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 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. Broadcast services, variable coding and modulation (VCM), 8, 16, 32 APSK modulations and code rates, new shorten roll-off factors, are the main specifications of the new DVB-S2 demodulator. A zero-IF interface allows for a seamless connection to market proven satellite silicon tuners. 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-D offers an on-chip blind scanning algorithm for DVB-S2X/S2/S and DVB-C standards, as well as a blind lock subset mode. The DVB-T and DVB-C, including ITU-T J.83 AnnexB, demodulators leverage field-proven technology of Silicon Labs' Si2164/67/69 family of digital television demodulators.



  • DVB-T2 and T2-Lite (ETSI EN 302 755-V1.3.1)
    • COFDM demodulator and FEC (LDPC + BCH)decoder
    • Bandwidth: 1.7, 5, 6, 7 or 8 MHz (and extended BW)
    • Supports up to 255 PLPs and outputs the data PLP plus the common PLP (on a single TS)
    • Scrambling of L1 post-signaling supported
    • NorDig Unified 2.4, D-Book 7 V3 compliant
  • DVB-T (ETSI EN 300 744)
    • COFDM demodulator and enhanced FEC decoder
    • NorDig Unified 2.4, 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 M Symbol(s)
    • C-Book compliant
  • DVB-S2 (ETSI EN 302 307-1)
    • QPSK/8PSK demodulator and FEC (LDPC) decoder
  • DVB-S2X (ETSI EN 302 307-2)
    • QPSK/8PSK, 8/16/32APSK demodulator
    • Roll-off factors from 0.05 to 0.35
  • DVB-S (ETSI EN 300 421) and DSS
    • QPSK demodulator and enhanced FEC decoder
  • 1 to 45 MSymbols/s for all satellite standards (<40 MSps in 32APSK)
  • DiSEqC™ 2.0 interface, Unicable support
  • Enhanced immunity to co-channel interferers
  • I2C serial bus interfaces (Master and Host)
  • Independent differential IF input for T/C tuner and differential 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 media
  • Only two power supplies: 1.2 and 3.3 V
  • Pin-to-pin conpatible with all Si216x/8x single demods family
  • API compatible with all single and dual demods families
  • 7 mm x 7 mm, QFN-48 pin package, Pb-free/RoHS compliant

Si2169 Product Matrix

Part Number Data Sheet Description
Digital Demodulator
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