SAA7705H中文資料飛利浦數(shù)據(jù)手冊PDF規(guī)格書

GENERAL DESCRIPTION

The SAA7705H performs all the signal functions in front of the power amplifiers and behind the AM and FM multiplex demodulation of a car radio or the tape input. These functions are:

? Interference absorption

? Stereo decoding

? RDS decoding

? FM and AM weak signal processing (soft mute, sliding stereo, etc.)

? Dolby-B tape noise reduction

? Audio controls (volume, balance, fader and tone).

FEATURES

Hardware

? Three 3rd-order Switched Capacitor Analog-to-Digital converters (SCADs)

? Digital-to-Analog Converters (DACs) with four times oversampling and noise shaping

? Digital stereo decoder for the FM multiplex signal

? Improved digital Interference Absorption Circuit (IAC) for FM

? Radio Data System (RDS) processing with an optional 16-bit buffer via a separate channel (two tuners possible)

? Auxiliary high Common-Mode Rejection Ratio (CMRR) analog CD input (CD-walkman, speech, economic CD-changer, etc.)

? I2C-bus controlled

? Four channel 5-band I2C-bus controlled parametric equalizer

? Two separate full I2S-bus and LSB-justified formats high performance input interfaces

? Audio output short-circuit protected

? Separate AM left and right inputs

? Phase-Locked Loop (PLL) to generate the high frequency DSP clock from a common fundamental oscillator crystal

? Analog single-ended tape inputs

? I2S-bus subwoofer output (mono or stereo)

? Expandable with additional DSPs for sophisticated features through an I2S-bus gateway

? Operating ambient temperature from ?40 to +85 °C.

Software

? Improved FM weak signal processing

? Integrated 19 kHz MPX filter and de-emphasis

? Electronic adjustments: FM/AM level, FM channel separation and Dolby level

? Baseband audio processing (treble, bass, balance, fader and volume)

? Dynamic loudness or bass boost

? Audio level meter

? Tape equalisation (tape analog playback)

? Music Search System (MSS) detection for tape

? Dolby-B tape noise reduction

? Adjustable dynamics compressor

? CD de-emphasis processing

? Improved AM reception

? Soft audio mute

? AM IAC

? Pause detection for RDS updates

? Signal level, noise and multipath detection for AM/FM signal quality information.

APPLICATIONS

? Car radio systems