參數(shù)資料
型號(hào)： SAA7826
廠商： NXP Semiconductors N.V.
英文描述： CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control
中文描述： CD音頻解碼器，數(shù)字伺服和濾波器DAC，具有集成前置放大器和激光控制
文件頁(yè)數(shù)： 29/89頁(yè)
文件大?。?/td> 379K
代理商： SAA7826
2003 Oct 01
29
Philips Semiconductors
Product specification
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
SAA7826
7.16
Servo part
7.16.1
D
IODE SIGNAL PROCESSING
The photo detector in conventional two-stage three-beam
Compact Disc systems normally contains six discrete
diodes. Four of these diodes (three for single foucault
systems) carry the Central Aperture signal (CA) while the
other two diodes (satellite diodes) carry the radial tracking
information.TheCA signalsaresummedintoanHF signal
for the decoder function and are also differentiated (after
analog-to-digital conversion) to produce the low frequency
focus control signals.
The low frequency content of the six (five if single
Foucault) photo diode inputs are converted to digital Pulse
Density Modulated (PDM) bitstreams by six Sigma-delta
ADCs. These support a range of OPUs by interfacing to
Voltage mode mechanisms and by having 16 selectable
gain ranges in two sets, one set for D1-to-D4 and the other
for R1 and R2.
Table 13
Shadow register settings to control diode input current and voltage ranges
SHADEN BITS
SHADOW
REGISTER
ADDRESS
DATA
VOLTAGEMODE
(mV)
INITIAL
01
(bank 1)
A
signal magnitude
control for diodes
D1 to D4
(LF only)
1010
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
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參數(shù)描述
SAA7826HL 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control
SAA7826HL/E/M1A 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
SAA7826HL/E/M1A,55 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
SAA7826HL/M1A 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
SAA7826HL/M1A,557 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC PHONIC AUTO RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
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