DESCRIPTION

The STV0299 Satellite Receiver with FEC is a CMOS single-chip multistandard demodulator for digital satellite broadcasting. It consists of two A/D converters for I-input and Q-input, a multistandard QPSK and BPSK demodulator, and a forward error correction (FEC) unit having both an inner (Viterbi) and outer (Reed-Solomon) decoder.

The FEC unit is compliant with the DVB-S and DSSTM specifications. Processing is fully digital.

It integrates a derotator before the Nyquist root filter, allowing a wide range of offset tracking.

The high sampling rate facilitates the implementation of low-cost, direct conversion tuners.

■ MULTISTANDARD QPSK AND BPSK DEMODULATION

■ EASY IMPLEMENTATION WITH LOW COST DIRECT CONVERSION TUNERS

■ EXTREMELY LOW BER WHEN CO-CHANNEL INTERFERENCE

■ WIDE CARRIER LOOP TRACKING RANGE TO COMPENSATE FOR DISH FREQUENCY DRIFT

■ COMMON INTERFACE COMPLIANT

■ VERY LOW POWER CONSUMPTION

■ INTEGRATED DUAL 6-BIT ANALOG TO DIGITAL CONVERTERS

■ DUAL DIGITAL AGC

■ DIGITAL NYQUIST ROOT FILTER WITH ROLL-OFF OF 0.35 OR 0.20

■ DIGITAL CARRIER LOOP WITH LOCK DETECTOR, ON-CHIP WIDE RANGE DEROTATOR AND TRACKING LOOP (TYP ± 45 MHz)

■ DIGITAL TIMING RECOVERY WITH LOCK DETECTOR

■ CHANNEL BIT RATE UP TO 90 Mbps AND SYMBOL FREQUENCY RATE FROM 1 TO 50 MSYMBOLS

■ INNER DECODER:

   - VITERBI SOFT DECODER FOR CONVOLUTIONAL CODES, M=7, RATE 1/2

   - PUNCTURED CODES 1/2, 2/3, 3/4, 5/6, 6/7 AND 7/8

■ SYNCHROWORD EXTRACTION

■ CONVOLUTIVE DEINTERLEAVER

■ OUTER DECODER:

   - REED-SOLOMON DECODER FOR 16 PARITY BYTES; CORRECTION OF UP TO 8 BYTE ERRORS

   - ENERGY DISPERSAL DESCRAMBLER

■ ON-CHIP FLEXIBLE CLOCK SYSTEMS TO ALLOW USE OF EXTERNAL CLOCK SIGNALS IN 4 MHz TO 30 MHz RANGE

■ EASY-TO-USE C/N ESTIMATOR WITH 2 TO 18 dB RANGE

■ I2C SERIAL BUS AND REPEATER

■ DVB COMMON INTERFACE COMPLIANT PARALLEL OUTPUT FORMAT

■ PARALLEL AND SERIAL DATA OUTPUT

■ LNB SUPPLY CONTROL WITH STANDARD I/O, 22 KHz TONE AND DISEQCTM MODULATOR WITH TTL OUTPUT

■ CMOS TECHNOLOGY: 2.5 V OPERATION; JEDEC (EIA/JESD8-5)

APPLICATIONS

■ DIGITAL SATELLITE RECEIVER AND SET-TOP BOXES