GENERAL DESCRIPTION

The TDA10021HT is a single-chip DVB-C channel receiver for 4, 16, 32, 64, 128 and 256 QAM modulated signals. The device interfaces directly to the IF signal, which is sampled by a 10-bit ADC.

FEATURES

• 4, 16, 32, 64, 128 and 256 Quadrature Amplitude Modulation (QAM) demodulator (DVB-C compatible: ETS 300-429/ITU-T J83 annex A/C)

• High performance for 256 QAM, especially for direct IF applications

• On-chip 10-bit Analog-to-Digital Converter (ADC)

• On-chip Phase-Locked Loop (PLL) for crystal frequency multiplication (typically 4 MHz crystal)

• Digital downconversion

• Programmable half Nyquist filter (roll off = 0.15 or 0.13)

• Two Pulse Width Modulated (PWM) AGC outputs with programmable take over point (for tuner and downconverter control)

• Clock timing recovery, with programmable 2nd-order loop filter

• Variable symbol rate capability from SACLK/64 to SACLK/4 (SACLK = 36 MHz maximum)

• Programmable anti-aliasing filters

• Full digital carrier recovery loop

• Carrier acquisition range up to 18 of symbol rate

• Integrated adaptive equalizer (linear transversal equalizer or decision feedback equalizer)

• On-chip Forward Error Correction (FEC) decoder (de-interleaver and RS decoder) and fully DVB-C compliant

• DVB compatible differential decoding and mapping

• Parallel and serial transport stream interface simultaneously

• I2C-bus interface, for easy control

• CMOS 0.2 µm technology.

APPLICATIONS

• Cable set-top boxes

• Cable modems

• MMDS (ETS 300-749) set-top boxes.