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Número de pieza | LA9230M | |
Descripción | Analog Signal Processor ASP for CD players | |
Fabricantes | Sanyo | |
Logotipo | ||
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No Preview Available ! Ordering number: EN 5189
Monolithic Linear IC
LA9230M/9231M
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.
Package Dimensions
unit : mm
3159-QIP64E
[LA9230M/9231M]
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.
SANYO : QIP64E
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
Specifications
Maximum Ratings at Ta = 25 °C, Pins 22, 45 = GND
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
Vsup max
Pd max
Topr
Tstg
Conditions
Pin 56, 64
Ratings
7
350
–25 to +75
–40 to +150
Unit
V
mW
°C
°C
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
1 page LA9230M/9231M
Continued from preceding page.
Pin
No.
Symbol
52 DAT
53 CE
54 DRF
55 NC
56 VCC2
57 REF1
58 VR
59 LF2
60 PH1
61 BH1
62 LDD
63 LDS
64 VCC1
Contents
Microprocessor command data input pin.
Microprocessor command chip enable input pin.
RF level detection output (Detect RF).
No connection
Servo system and digital system VCC pin.
By-pass capacitor connection pin for reference voltage.
Reference voltage output pin.
Disc defect detection time constant setting pin.
RF signal peak hold capacitor connection pin.
RF signal bottom hold capacitor connection pin.
APC circuit output pin.
APC circuit input pin.
RF system VCC pin.
No.5189 - 5/20
5 Page LA9230M/9231M
Microprocessor Command List
MSB LSB Command
0 0 0 0 0 0 0 0 RESET
0 0 0 0 1 0 0 0 FOCUS START
1 1 1 1 0 0 0 0 2BYTE-COMMAND DETECT
1 1 1 1 1 0 0 0 2BYTE-COMMAND DETECT
1 1 1 1 1 1 1 1 2BYTE-COMMAND RESET
1 0 0 1 0 0 0 0 FOCUS-OFFSET ADJUST START
1 0 0 1 0 0 0 1 FOCUS-OFFSET ADJUST OFF
1 0 0 1 0 0 1 0 TRACK-OFFSET ADJUST START
1 0 0 1 0 0 1 1 TRACK-OFFSET ADJUST OFF
1 0 0 1 0 1 0 0 LASER ON
1 0 0 1 0 1 0 1 LASER OFF : F-SERVO ON
1 0 0 1 0 1 1 0 LASER OFF : F-SERVO OFF
1 0 0 1 0 1 1 1 SPINDLE 8CM
1 0 0 1 1 0 0 0 SPINDLE 12 CM
1 0 0 1 1 0 0 1 SPINDLE OFF
1 0 0 1 1 0 1 0 SLED ON
1 0 0 1 1 0 1 1 SLED OFF
1 0 0 1 1 1 0 0 E/F BALANCE START
1 0 0 1 1 1 0 1 TRACK-SERVO OFF
1 0 0 1 1 1 1 0 TRACK-SERVO ON
Reset mode
Power on mode
V
V
V
V
V
Nonadjusted
V
DSP
RESET(NOTHING)
FOCUS START #1
2BYTE-COMMAND DETECT
2BYTE-COMMAND DETECT
2BYTE-COMMAND RESET
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Notes Concerning Microprocessor Program Creation
1. Commands
After sending the FOCUS START command and the E/F BALANCE START command, send 11111110 (FEH) in order to
clear the internal registers of the IC.
Reason: Although the above commands are executed at point 1 in the timing chart below, the same commands will be
executed again at point 2 if there is subsequent input to CE as shown below.
Timing
2 µs or more
2 µs or more
10 µs or more
1 µs or more
1 µs or more
‘‘FOCUS START’’ command
‘‘E/F BALANCE START’’ command
When sending a TRACK-OFFSET ADJUST START command or a FOCUS-OFFSET ADJUST START command after either
VCC ON (POWER ON RESET), RESET command, or a corresponding OFFSET ADJUST OFF command, waiting time is
necessary as listed below. (Only when a 4.2 MHz clock is input.)
TRACK-OFFSET ADJUST START: 4 ms or more
FOCUS-OFFSET ADJUST START: 30 ms or more
2. E/F balance adjustment
E/F balance adjustments should be made in a bit region of the disc, not a mirrored region. (This is because the E/F balance
adjustment entails about 100 to 200 track kicks.)
Since there is no track-kick for LA9231M, measures must be taken during EF balance adjustment to obtain a stable TE
signal. (By a sled movement signal from a microprocessor, for example.)
No.5189 - 11/20
11 Page |
Páginas | Total 20 Páginas | |
PDF Descargar | [ Datasheet LA9230M.PDF ] |
Número de pieza | Descripción | Fabricantes |
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