SP3721A Datasheet | Acer Laboratories

6X DVD analog Front End Chip Confidential Opto-Electronics & Systems Laboratories Version 1.00 (June 2000) SP3721A : 6X DVD Analog Front End Chip --Preliminary, Confidential, Proprietary-- SP3721A : 6x DVD Analog Front End Chip Section 1 : INTRODUCTION 1.1 Features ?? Supports AGC and an equalizer/filter for CD 3x to 32x and DVD 1x to 6x (with RX=8.2kohm) ?? Low Power operation (350m W typical @5V) ?? Bi-directional serial port register access ?? Register programmed power management (Sleep mode <5m W) ?? Power supply range (4.4 to 5.5 V) ?? Small footprint 64-lead TQFP Package ?? Programmable boost/equalization of 0 to 12d B ?? Single-ended normal outputs for pulse qualification ?? Differential normal signal outputs ?? ? 20% Fc accuracy (Fc = 2 to 4 MHz) ?? ? 15% Fc accuracy (Fc = 4 to 10 MHz, 8 to 24 MHz) ?? Less than 2 % total harmonic distortion ?? No external filter ponents required Servo System ?? Programmable equalizer for the Differential Phase tracking error Detection Circuit (DPD) ?? 70 KHz bandwidth for the focus and PI circuits ?? Input programmable gain control amplifier ?? Servo algebra signals used for optical alignment, seeking, focusing and track following : - Pull-in Signal output - Mirror Signal output - Defect signal output/BCA (Burst Cutting Area) code output - Tracking Error Signal output Top Hold Push-Pull/3-beam tracking error detection - Differential Phase tracking error Detection Focusing Error Signal Output Center Error Signal Output Auto LASER Power Control ??Supports power mode selection ??Provides dual APC circuits for twin laser VC Reference Voltage ??Provides a reference voltage output (VC) for external circuits ??Provides reference voltage input (VCI) for internal servo output reference voltage ??Provides reference voltage input (VCI2) for internal servo input reference voltage Channel ?? 40 MHz bandwidth ?? Supports individual RF inputs for DVD (differential or single-ended) and CD (Single-ended) ?? Supports internal...