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Description

The Si21822 integrates two separate high-performance digital

demodulators for the Japanese and South American terrestrial

ISDB-T standard and for the DVB-T2/T, DVB-C, DVB-S2/S and

DVB-S2X standards into a single compact package. Leveraging

Skyworks' proven digital demodulation architecture, the Si21822

achieves excellent reception performance for each media while

significantly minimizing front-end design complexity, cost, and

power dissipation. Connecting the Si21822 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.

Leveraging significant field experience in DVB terrestrial

demodulation (DVB-T2/T), the Si21822 dual demodulator can

accept standard or low-IF inputs (differential) and complies with

the Brazilian SBTVD-T terrestrial specifications (ABNT NBR

16.601 and 15.604). Main features include fast channel scan, very

short lock times, state of the art CCI performance, partial

reception, and auxiliary channels decoding.

Skyworks’ internally-developed DVB-T2 (including T2-Lite)

demodulators support all modes specified by the DVB-T2 standard

(V1.4.1). 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,

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 Si21822 offers an on-chip blind scanning algorithm for DVBS/

S2/S2X and DVB-C standards, as well as blind lock function.

The Si21822 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

- ISDB-T (ABNT NBR 16.601 and 15.604)

- 6, 7, and 8 MHz bandwidth

- Partial reception supported

- AC1 and AC2 decoding

- DVB-T2 and T2-Lite (ETSI EN 302 755-V1.4.1)

- Bandwidth: 1.7, 5, 6, 7 or 8 MHz (and extended BW)

- NorDig Unified 2.5 and D-Book 8 compliant

- 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