參數資料
型號： SAA7826HL
廠商： NXP Semiconductors N.V.
元件分類： DRAM
英文描述： CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control
封裝： SAA7826HL/M1AS/S5<SOT315-1 (LQFP80)|<<http://www.nxp.com/packages/SOT315-1.html<1<Always Pb-free,;
文件頁數： 30/89頁
文件大?。?/td> 379K
代理商： SAA7826HL
2003 Oct 01
30
Philips Semiconductors
Product specification
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
SAA7826
01
(bank 1)
C
signal magnitude
control for diodes
R1 and R2
(LF only)
1100
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
20
25
30
40
60
75
100
120
150
200
270
350
450
600
720
960
reset
SHADEN BITS
SHADOW
REGISTER
ADDRESS
DATA
VOLTAGEMODE
(mV)
INITIAL
7.16.2
S
IGNAL CONDITIONING
The digital codes retrieved from the ADCs are applied to
logic circuitry to obtain the various control signals. The
signals from the central aperture diodes are processed to
obtain a normalised focus error signal:
Where the detector set-up is assumed to be as shown in
Fig 21.
In the event of single Foucault focusing method, the signal
conditioning can be switched under software control such
that the signal processing is as follows:
The error signal, FE
n
, is further processed by a
Proportional Integral and Differential (PID) filter section.
A Focus OK (FOK) flag is generated by the central
aperture signal and an adjustable reference level. This
signal is used to provide extra protection for the
Track-Loss (TL) generation, the focus start-up procedure
and the dropout detection.
The radial or tracking error signal is generated by the
satellite detector signals R1 and R2. The radial error
signal can be formulated as follows:
RE
s
= (R1
R2)
×
re_gain + (R1 + R2)
×
re_offset.
Where the index ‘s’ indicates the automatic scaling
operation which is performed on the radial error signal.
This scaling is necessary to avoid non-optimum dynamic
range usage in the digital representation and reduces the
radial bandwidth spread. Furthermore, the radial error
signal will be made free from offset during start-up of the
disc.
The four signals from the central aperture detectors,
together with the satellite detector signals generate a
Track Position signal (TPI) which can be formulated as
follows:
TPI = sign [(D1 + D2 + D3 + D4)
(R1 + R2)
×
sum_gain]
Where the weighting factor sum_gain is generated
internally by the SAA7826 during initialization.
FE
n
D1
D2
D2
–
+
D1
D3
D4
D4
–
+
D3
–
=
FE
n
2
D2
D2
–
+
D1
×
=
相關PDF資料
PDF描述
SAA7826HL CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control
SAA7893 Super audio media player
SAA7893HL Super audio media player
SAA8112HL Digital Camera Signal Processor and Microcontroller(數字照相信號處理器和微控制器)
SAA8113HL Digital PC-camera signal processor(數字PC照相信號處理器)
相關代理商/技術參數
參數描述
SAA7826HL/E/M1A 功能描述:音頻數/模轉換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
SAA7826HL/E/M1A,55 功能描述:音頻數/模轉換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
SAA7826HL/M1A 功能描述:音頻數/模轉換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
SAA7826HL/M1A,557 功能描述:音頻數/模轉換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
SAA7826HL/M1AS/S5, 制造商:NXP Semiconductors 功能描述:- Tape and Reel 制造商:NXP Semiconductors 功能描述:DSP
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數量 廠商 批號 封裝
添加更多采購

我的聯系方式

*
*
*