آر اف (فرکانس رادیویی) و بی‌سیم سایر آی سی‌ و ماژول‌های آر اف

Product Attributes

Introduction

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 Silicon Labs' 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.

Silicon Labs’ 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 Silicon Labs 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 DVB-S/ 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
• 8×8 mm, QFN-68 pin package, Pb-free/RoHS compliant

Applications

• Multi-receiver iDTV: on-board or in a NIM
• Advanced multimedia PVR STBs
• PC-TV accessories
• PVR, DVD, and Blu-Ray disc recorders