Analog Signal Processor (ASP)

for CD players

Overview

The LA9230M and LA9231M are analog signal processing and

servo control bipolar ICs designed for use in compact disc

players; a compact disc player can be configured by combining

these ICs, a CD-DSP such as the LC78620E, and a small

number of additional components. The differences between the

LA9230M and the LA9231M are that the LA9231M: (1) has a

focus search time that is four times faster; (2) has an additional

capacitor pin for focus search smoothing; (3) and can disable

output of the track-kick signal during EF balance adjustment.

Functions

I/V amplifier, RF amplifier (with AGC), SLC, APC, FE, TE

(with VCA and auto-balance function), focus servo amplifier

(with offset cancellation function), tracking servo amplifier

(with offset cancellation function), spindle servo amplifier

(with gain switching function), sled servo amplifier (with off

function), focus detection (DRF, FZD), track detection (HFL,

TES), defect detection, and shock detection.

Features

The following automatic adjustment functions are built in.

.

Focus offset auto cancel

.

Tracking offset auto cancel

.

EF balance auto adjustment

.

RF level AGC function

.

Tracking servo gain RF level following function

Package Dimensions

unit : mm

3159-QIP64E

[LA9230M/9231M]

SANYO : QIP64E

Specifications

Maximum Ratings at Ta=25 °C, Pins 22, 45 = GND

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

Vsup max

Pin 56, 64

7

V

Allowable power dissipation

Pd max

350

mW

Operating temperature

Topr

–25 to +75

°C

Storage temperature

Tstg

–40 to +150

°C

Ordering number: EN 5189

Monolithic Linear IC

LA9230M/9231M

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

92595HA(II) No.5189-1/20