參數資料
型號： SAA7384
廠商： NXP Semiconductors N.V.
英文描述： Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems
中文描述： 地面數字音頻解碼器為傳統(tǒng)載波鎖相環(huán)中頻系統(tǒng)
文件頁數： 2/40頁
文件大?。?/td> 182K
代理商： SAA7384
1996 Oct 24
2
Philips Semiconductors
Preliminary specification
Terrestrial digital sound decoder for
conventional intercarrier PLL-IF systems
SAA7284
FEATURES
Single-chip solution including FM and vision filters,
analog demodulator and audio switching
Dual standard with automatic selection between PAL
system I and BGH
Suitable for conventional intercarrier PLL-IF
(single SAW) TV/VCR systems
Single low-radiation crystal oscillator for improved EMC
Stereo bitstream audio DACs
Programmable attenuator for matching levels of NICAM
and FM audio sources at the output of the device
Full EBU specification NICAM 728 demodulation and
decoding
Digital Audio Interface conforming with EBU/IEC 958
Automatic mute function which switches from NICAM to
FM sound when NICAM fails
Compatible with either single-ended or differential
DQPSK input signals
Microcomputer controlled via I
2
C-bus (up to 400 kHz
specification).
APPLICATIONS
Television receivers
Video cassette recorders.
GENERAL DESCRIPTION
Philips Semiconductors have pushed the boundaries of
Stereo Sound further with this addition to the successful
Terrestrial Digital Sound Decoder family. The SAA7284
device is an application specific version of the existing
SAA7283, with guaranteed improved specification on
selected parameters, enabling comparable RF
performance in conventional intercarrier PLL-IF systems,
to that of the SAA7283 in QSS systems.
The SAA7284 takes, as input, a second IF (intercarrier)
Terrestrial TV PAL signal, and performs all the Differential
Quadrature Phase Shift Keying (DQPSK) demodulation,
digital decoding and digital-to-analog conversion
necessary to produce a complete NICAM receiver on a
single integrated circuit.
The demodulator function includes integrated baseband
filters for pulse shaping and unwanted signal rejection,
automatic gain control, a low jitter integrated VCO, digital
monostables for precise data sampling points and a
multi-standard controller to enable automatic locking to
either a PAL system I or PAL system BGH input signal.
The decoder function performs the descrambling,
de-interleaving and reformatting operations required to
recover the original data words.
The data words are processed through a stereo digital
filter, digital de-emphasis network, second order noise
shaper and 256 times oversampling Bitstream audio DAC.
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
SAA7284ZP
SAA7284GP
SDIP52
QFP64
plastic shrink dual in-line package; 52 leads (600 mil)
plastic quad flat package; 64 leads (lead length 1.95 mm);
body 14
×
20
×
2.8 mm
SOT247-1
SOT319-2
相關PDF資料
PDF描述
SAA7284 Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems
SAA7284ZP Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems
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