參數(shù)資料
型號(hào)： SAA7327
廠商： NXP Semiconductors N.V.
英文描述： Digital servo processor and Compact Disc decoder with integrated DAC for video CD (CD7 II)(應(yīng)用于視頻CD的帶綜合數(shù)模轉(zhuǎn)換器（DAC）的數(shù)字伺服處理器和光盤譯碼器)
中文描述： 數(shù)字伺服處理器和光盤解碼器集成了用于視頻光盤（CD7抗原二）（應(yīng)用于視頻光碟的帶綜合數(shù)模轉(zhuǎn)換器（DAC）的的數(shù)字伺服處理器和光盤譯碼器援會(huì)）
文件頁(yè)數(shù)： 10/68頁(yè)
文件大?。?/td> 284K
代理商： SAA7327
2000 Jun 26
10
Philips Semiconductors
Product specification
Digital servo processor and Compact Disc
decoder with integrated DAC for video CD (CD7 II)
SAA7327
7.2
Crystal oscillator
The crystal oscillator is a conventional 2-pin design
operating between 8 and 35 MHz. This oscillator is
capable of operating with ceramic resonators and with
both fundamental and third overtone crystals. External
components should be used to suppress the fundamental
output of the third overtone crystals as shown in
Figs 3 and 4. Typical oscillation frequencies required are
8.4672, 16.9344 or 33.8688 MHz depending on the
internal clock settings used and whether or not the clock
multiplier is enabled.
7.3
Data slicer and clock regenerator
The SAA7327 has an integrated slice level comparator
which can be clocked by the crystal frequency clock, or
4 times the crystal frequency clock (if SELPLL is set HIGH
while using a 16.9344 MHz crystal and register 4 is set to
0XXX), or 8 times the crystal frequency clock (if SELPLL is
set HIGH while using an 8.4672 MHz crystal, and
register 4 is set to 0XXX). The slice level is controlled by
an internal current source applied to an external capacitor
under the control of the Digital Phase-Locked
Loop (DPLL).
Regeneration of the bit clock is achieved with an internal
fully digital PLL. No external components are required and
the bit clock is not output. The PLL has two registers
(8 and 9) for selecting bandwidth and equalization.
The PLL response is shown in Fig.5.
For certain applications an off-track input is necessary.
This is internally connected from the servo part (its polarity
can be changed by the foc_parm1 parameter), but may be
input via the V1 pin if selected by register C. If this flag is
HIGH, the SAA7327 will assume that its servo part is
following on the wrong track, and will flag all incoming
HF data as incorrect.
handbook, halfpage
OSCILLATOR
8.4672 MHz
CRIN
CROUT
SAA7327
33 pF
33 pF
MGS246
Fig.3 8.4672 MHz fundamental configuration.
handbook, halfpage
OSCILLATOR
33.8688 MHz
CRIN
CROUT
SAA7327
3.3
μ
H
1 nF
10 pF
10 pF
MGS247
Fig.4 33.8688 MHz overtone configuration.
MGS178
handbook, halfpage
f
3
. PLL, LPF
2
. PLL bandwidth
1
. PLL integrator
PLL
loop
response
Fig.5 Digital PLL loop response.
1, 2 and 3 are programmable via decoder register 8.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA7327H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder with integrated DAC for video CD CD7 II
SAA7327H/T/M2B,557 功能描述:視頻 IC COMPACT DISC SYSTEMS RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAA7327HBG 功能描述:視頻 IC COMPACT DISC SYSTEMS RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAA7335 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:DSP for CD and DVD-ROM systems
SAA7335GP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:DSP for CD and DVD-ROM systems
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