CXD2027Q中文資料索尼數(shù)據(jù)手冊PDF規(guī)格書

Description

The CXD2027Q/R are audio signal processors designed for DBS applications. These LSIs perform all digital processing from QPSK demodulation to analog audio output on a single chip.

Features

QPSK and PCM demodulators and DAC output are configured on a single chip.

Descrambler interface according to the COATEC system and SkyPort system .

Functions

QPSK demodulator

? Carrier, clock and data regeneration

? ALC and VCXO adjustment-free

PCM demodulator

? Frame sync protection by correlation detection

? De-interleaving and descrambling

? BCH error correction, range bit error correction

? Audio data range control

Expansion from 10 to 14 bits in A mode

Upper bit majority correction in B mode

? Control sign integration correction, chargeable flag integration correction by master frame synchronization

? Interface output for external DAC

? Digital interface output

1-bit DAC output

? Quadruple oversampling filter

? Digital de-emphasis circuit

? 1-bit stereo DAC with 2nd-order ?∑ format noise shaper

S/N ratio : 90dB (Typ.)

Distortion : 0.011 (Typ.)

CPU interface

? I2C bus

Descrambler interface

? COATEC system, SkyPort system

Mute functions

? Error occurrence frequency detection mute

? Audio chargeable flag detection mute

? Control sign (B7) detection mute