參數(shù)資料
型號(hào)： 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(yè)數(shù)： 27/89頁(yè)
文件大小： 379K
代理商： SAA7826HL
2003 Oct 01
27
Philips Semiconductors
Product specification
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
SAA7826
MGA364 - 2
VSS
+
M
MOTO1
V4
MOTO2
V5
100 nF
10
Fig.19 Motor 4-line PWM mode application diagram.
7.15.1.4
CDV/CAV output mode
In the CDV motor mode, the FIFO position will be put in
pulse-width modulated form on the MOTO1 pin [carrier
frequency = 300
×
d Hz; where ‘d’ is the disc speed
factor]. The PLL frequency signal will be put in
pulse-density modulated form (carrier
frequency = 4.23
×
n MHz) on the MOTO2 pin. The
integrated motor servo is disabled in this mode.
The PWM signal on MOTO1 corresponds to a total
memory space of 20 frames, therefore the nominal FIFO
position (half full) will result in a PWM output of 60%.
In the lock-to-disc (CAV) mode the CDV motor mode is the
only mode that can be used to control the motor.
7.15.2
S
PINDLE MOTOR OPERATING MODES
The operating modes of the motor servo are controlled by
decoder register 1; see Table 12.
In the SAA7826 decoder there is an anti-windup mode for
themotorservo,selectedviadecoderregister 1.Whenthe
anti-windup mode is activated the motor servo integrator
will hold if the motor output saturates.
7.15.2.1
Motor OV flag
The SAA7826 contains a servo loop that is used to
regulate the spindle speed. The motor OV flag is provided
to indicate when the motor output has overloaded. During
alargechangeindiscspeed,i.e.byalongjumporX factor
change, the motor OV flag will be asserted due to the full
and longer duration required to attain the new desired
sped.
The OC flag indicates when the internal processes of the
modulator have overflowed and not necessarily when the
output power has reached 100%. Similarly, the flag does
not fall at a specific output power level but at a specific
speed error level. The error level at which the flag falls is
determined by the selected servo gain and will be
internally equivalent to +3
×
gain or
3
×
gain.
7.15.2.2
Power limit
In start mode 1, start mode 2, stop mode 1 and stop
mode 2, a fixed positive or negative voltage is applied to
the motor.
This voltage can be programmed as a percentage of the
maximum possible voltage, via register 6, to limit current
drain during start and stop.
The following power limits are possible:
100% (no power limit), 75%, 50% or 37% of maximum.
相關(guān)PDF資料
PDF描述
SAA7893 Super audio media player
SAA7893HL Super audio media player
SAA8112HL Digital Camera Signal Processor and Microcontroller(數(shù)字照相信號(hào)處理器和微控制器)
SAA8113HL Digital PC-camera signal processor(數(shù)字PC照相信號(hào)處理器)
SAA8115HL Digital Camera USB Interface(數(shù)字照相USB接口)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
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(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*