Product Summary

The TDA10021HT/B3 is a single-chip DVB-C channel receiver for 4, 16, 32, 64, 128 and 256 QAM modulated signals. The TDA10021HT/B3 interfaces directly to the IF signal, which is sampled by a 10-bit ADC. The TDA10021HT/B3 performs the clock and the carrier recovery functions. The digital loop filters for both clock and carrier recovery are programmable in order to optimize their characteristics according to the current application. Applications are (1)Cable set-top boxes; (2)Cable modems; (3)MMDS (ETS 300-749)set-top boxes.

Parametrics

TDA10021HT/B3 absolute maximum ratings: (1)VDDD33 digital supply voltage for the pads VDDD = 3.3 V ±10%: 2.97 to 3.63 V; (2)VDDD18 digital supply voltage for the core VDDD = 1.8 V ±5%: 1.7 to 1.9 V; (3)VDDD50 digital supply voltage only for 5 V requirements: 4.75 to 5.25 V; (4)IDDD33 digital supply current for the pads fs = 28.92 MHz; symbol rate = 7 Mbaud: 46 mA; (5)IDDD18 digital supply current for the core fs = 28.92 MHz; symbol rate = 7 Mbaud: 120mA; (6)Ptot total power dissipation fs = 28.92 MHz; symbol rate = 7 Mbaud: 540mW; (7)Ci input capacitance: 5 pF; (8)Tamb ambient temperature: 0 to 70 °C.

Features

TDA10021HT/B3 features: (1)High performance for 256 QAM, especially for direct IF applications; (2)On-chip 10-bit Analog-to-Digital Converter (ADC); (3)On-chip Phase-Locked Loop (PLL)for crystal frequency multiplication (typically 4 MHz crystal); (4)Digital downconversion; (5)Programmable half Nyquist filter (roll off = 0.15 or 0.13); (6)Two Pulse Width Modulated (PWM)AGC outputs with programmable take over point (for tuner and downconverter control); (7)Clock timing recovery, with programmable 2nd-order loop filter; (8)Variable symbol rate capability from SACLK/64 to SACLK/4 (SACLK = 36 MHz maximum); (9)Programmable anti-aliasing filters; (10)Full digital carrier recovery loop; (11)Carrier acquisition range up to 18% of symbol rate; (12)Integrated adaptive equalizer (linear transversal equalizer or decision feedback equalizer).

Diagrams

TDA10021HT/B3 pin connection