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LC78637E PDF预览

LC78637E

更新时间: 2024-11-21 20:10:11
品牌 Logo 应用领域
安森美 - ONSEMI 商用集成电路
页数 文件大小 规格书
20页 189K
描述
IC,CD-PLAYER PROCESSOR/CONTROLLER,CMOS,QFP,80PIN,PLASTIC

LC78637E 技术参数

生命周期:Obsolete包装说明:QFP, QFP80,.68SQ
Reach Compliance Code:compliant风险等级:5.69
商用集成电路类型:CONSUMER CIRCUITJESD-30 代码:S-PQFP-G80
端子数量:80最高工作温度:70 °C
最低工作温度:-20 °C封装主体材料:PLASTIC/EPOXY
封装代码:QFP封装等效代码:QFP80,.68SQ
封装形状:SQUARE封装形式:FLATPACK
电源:3.3 V认证状态:Not Qualified
子类别:Other Consumer ICs表面贴装:YES
技术:CMOS温度等级:COMMERCIAL
端子形式:GULL WING端子节距:0.635 mm
端子位置:QUADBase Number Matches:1

LC78637E 数据手册

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CMOS IC  
LC78637E  
for Compact Disc Player Applications  
„ Overview  
The LC78637E combines audio CD RF signal processing, servo control, EFM signal processing, audio  
signal processing, and a CDTEXT decoder in a single chip, enabling a system to be configured with very  
few peripheral components. The RF signal processing block performs such functions as EFM signal  
generation, error signal generation, and laser power control. The servo control block carries out A/D  
conversion of focus error and tracking error signals from the RF signal processing block, and digitally  
performs focus, tracking, sled, and spindle servo processing necessary for CD servo operation. The  
functions of the EFM signal processing block cover EFM signal demodulation and synchronization  
detection, protection, and interpolation, de-interleaving, and error detection and correction. The audio signal  
processing block handles data interpolation/mute processing based on the error correction situation, and  
incorporates an 8X over sampling filter, 1-bit DAC, and secondary LPF (differential amplifier). The status  
and characteristics of each function block can be set, or ascertained by data reads, via the microcomputer  
interface.  
„ Playback functions  
— Playback speed: 1X speed, 2X speed  
— Jitter-free playback (VCEC)  
— CD-R/W: 1X speed, 2X speed  
— Simple CLV playback  
„ RF processing block  
— RF system: AGC, CD-R, R/W playback supported, peak hold, bottom hold  
— Error system: Variable-balance TE signal generation, FE signal generation  
— Detection: Track counting signal, jitter, flaws (black, mirror)  
— Laser power control  
— DC offset voltage cancellation  
„ Servo control block  
— Digital processing of tracking, focus, sled, and spindle servos  
— Automatic adjustment functions: Focus gain, focus bias, focus offset, tracking gain, tracking offset,  
tracking balance  
— Use of Sanyo’s original high-performance servo control technology* to improve playability, covering  
external vibration and playback of warped or eccentric discs  
— Shock detection  
— Interruption detection  
* Robust control technology developed by Sanyo, offering remarkable ability to suppress vibration  
and shocks, and to achieve tracking of warped or eccentric discs  
„ EFM processing block  
— Error detection and correction  
— Built-in text decoder  
(C1 = twofold, C2 = fourfold/twofold)  
— EFM signal synchronization detection,  
— Jitter margin: ± 13 frames  
— DOUT output  
protection, interpolation  
„ Audio processing block  
— Interpolation (4 interpolations)  
— Digital attenuator  
— Fadeout function  
— Bilingual function  
— Built-in de-emphasis filter  
— Built-in secondary LPF for audio output  
— DF and DAC clocks can be supplied externally  
— 1-bit DAC (tertiary ∆ Σ noise shaper system)  
— Built-in 8X oversampling digital filter  

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