Overview

The LA9251M is a servo signal-processing IC for CD players. In combination with a CD DSP such as the LC78626KE, it can implement a CD player with a minimal number of external components.

Features

• Low-voltage operation: 2.4 V (minimum)

• Low current drain: 15 mA (at VCC= 3.0 V, typical)

• Built-in EF balance adjustment

• Built-in RF level AGC function

• RF level follower function for the tracking servo gain (with turn-off function)

Functions

• I/V amplifier

• SLC

• FE

• Focus servo amplifier

• Spindle servo amplifier (with gain switching function)

• Focus detection (DRF and FZD)

• Defect detection

• RF amplifier with AGC

• APC

• TE (with variable gain and auto balance function)

• Tracking servo amplifier

• Sled servo amplifier (with turn-off function)

• Track detection (HFL, TES)

• Shock detection