Description

The CXD1961AQ is a single chip DVB compliant Satellite Broadcasting Frontend IC, including dual A/D converter for analog baseband I/Q input, QPSK demodulator, Viterbi decoder Reed-Solomon decoder and Energy Dispersal descrambler. It is suitable for use in a DVB Integrated Receiver Decoder.

Features

• Dual 6 bit A/D converter

• QPSK demodulator

Multi-symbol rate operation

Nyquist Roll off filter (α = 0.35)

Clock recovery circuit

Carrier recovery circuit

AGC control (PWM output)

• Viterbi decoder

Constraint length 7

Truncation length 144

BER monitor of QPSK demodulator output

• Frame synchronization circuit

• Convolutional de-interleaver

• Reed-Solomon decoder (204,188) BER monitor of Viterbi decoder output

• Energy dispersal descrambler

• CPU interface circuit I2C bus interface (5V input capability)

• Package QFP 100pin

• Operating frequency 20 to 30MSPS

• Power consumption 750mW (@3.3V 30MSPS typical)

• Process 0.4µm CMOS Technology

Application

DVB-S Set Top Box (Satellite)