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Ordering number : ENN6125
Monolithic Linear IC
LA9251M
CD Player Analog Signal Processor (ASP)
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.
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
• Built-in EF balance adjustment
• Built-in RF level AGC function
• RF level follower function for the tracking servo gain
(with turn-off function)
Package Dimensions
unit: mm
3159-QIP64E
1.0
48
49
[LA9251M]
17.2
14.0 1.6
0.8 0.35 1.0
33
32
0.15
64
1
17
16
0.1
2.7
Features
• Low-voltage operation: 2.4 V (minimum)
• Low current drain: 15 mA (at VCC = 3.0 V, typical)
15.6 0.8
SANYO: QIP64E
Specifications
Maximum Ratings at Ta = 25°C, with pin 46 tied to ground
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Pin 56
Ta 75°C
Conditions
Ratings
7
200
–15 to +75
–40 to +150
Unit
V
mW
°C
°C
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
42800RM (OT) No. 6125-1/17

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LA9251M
Operating Conditions at Ta = 25°C, with pin 46 tied to ground
Parameter
Recommended supply voltage
Allowable operating supply voltage range
Symbol
VCC
VCC op
Conditions
Ratings
3
2.4 to 5.5
Unit
V
V
Electrical Characteristics at Ta = 25°C, with pin 46 tied to ground, pin 56 = 3 V
Parameter
Current drain
Reference voltage
[Interface]
SLOFvth
SP8vth
EFBALvth
FSTAvth
LASERvth
CLK
[RF Amplifier]
RF no-signal voltage
Minimum gain
[Focus Amplifier]
FDO gain
FDO offset
F search voltage (high) 1
F search voltage (low) 1
F search voltage (high) 2
F search voltage (low) 2
[Tracking Amplifier]
TE gain max
TE gain min
TE-3dB
TO gain
TGL offset
TGH offset
THLD offset
Off 1 offset
Balance range (high)
Balance range (low)
TGLvth
PH no-signal voltage
BH no-signal voltage
DRF detection voltage
DRF output voltage (high)
DRF output voltage (low)
FZD detection voltage 1
FZD detection voltage 2
HFL detection voltage
HFL output voltage (high)
HFL output voltage (low)
TES output voltage (low-high)
TES output voltage (high-low)
TES output voltage (high)
TES output voltage (low)
JP output voltage (high)
Symbol
ICCO
VREF
No input
VR
Conditions
SLOFvth SLOF
SP8vth SP8: 8 cm mode
EFBALvth EFBAL
FSTAvth ESTA
LASERvth LASER
CLK R = 390 k, C = 0.1 µF
RFo
RFGmin FIN1, FIN2: 1 M-input, PH1 = 2 V, f = 200 kHz, RF
FDG
FDost
FIN1, FIN2: 1 M-input, FDO
The difference from the reference voltage, servo on.
FS max1 FDO, FSS = GND
FS min1 FDO, FSS = GND
FS max2 FDO, FSS = VCC
FS min2 FDO, FSS = VCC
TEG max
TEG min
TEfc
f = 10 kHz, E: 1 M-input, PH1 = 0.5 V, TGRF = open
f = 10 kHz, E: 1 M-input, PH1 = 2 V, TGRF = open
E: 1 M-input
TOG TH TO gain, THLD mode
TGLost Servo on, TGL = high, TO
TGHost TGL = low, the difference from the TGL offset, TO
THDost THLD mode, the difference from the TGL offset, TO
OFF1ost TOFF = High
BAL-H GainE/F input, TB = 3 V, TBC = open
BAL-L GainE/F input, TB = 0 V, TBC = open
TGLvth
PHo The difference from RFSM
BHo10 The difference from RFSM
DRFvth At RFSM, the difference from VR
DRF-H
DRF-L
FZD1 FE, the difference from VR
FZD2 FE, the difference from VR
HFLvth At RF, the difference from VR
HFL-H
HFL-L
TES-LH TESI, the difference from VR
TES-HL TESI, the difference from VR
TES-H
TES-L
JP-H TJP = 3 V, at TO, the difference from TJP = 1.5 V
min
8
1.2
25
0.75
3.5
–340
–3.6
–11.0
10.0
–260
–35
–35
–25
0.8
–0.90
0.40
–0.50
2.5
0
–0.25
2.5
–0.15
0.05
2.5
0.05
Ratings
typ
14
1.5
max
21
1.8
Unit
mA
V
0.8 V
0.8 V
2.3 V
2.3 V
0.8 V
35 45 Hz
1.00
–15
1.25
V
dB
5.0
0
0.8
–0.8
0.8
0
6.5
+340
dB
mV
V
V
V
V
–3.0
–2.4
dB
–9.0
–7.0
dB
70 kHz
12.0
14.0
dB
0 +260 mV
0 +35 mV
0 +35 mV
0 +25 mV
+35 dB
–35 dB
1.5 1.8 V
–0.65
–0.40
V
0.65
0.90
V
–0.25
–0.10
V
2.9 V
0 0.5 V
0.2 V
0V
–0.10
–0.05
V
2.9 V
0 0.5 V
–0.10
–0.05
V
0.10
0.15
V
2.9 V
0 0.5 V
0.25
0.45
V
Continued on next page.
No. 6125-2/17

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Continued from preceding page.
LA9251M
Parameter
[Spindle Amplifier]
Offset 12
Offset 8
Offset off
Output voltage H12
Output voltage H8
[Sled Amplifier]
Offset SLD
Offset off
SLC no-signal voltage
Shock no-signal voltage
Shock detection voltage (high)
Shock detection voltage (low)
DEF detection voltage
DEF output voltage (high)
DEF output voltage (low)
APC reference voltage
APC off voltage
Symbol
Conditions
SPD12ost At SPD, the difference from VR, SP8 = 0 V: 12 cm mode
SPD8ost At SPD, the difference from VR, SP8 = 3 V: 8 cm mode
SPDof At SPD, the difference from VR, SP8 = 3 V: 8 cm mode
The difference from offset 12,
SPD-H12 SP8 = 0 V, 12 cm mode, CLV = 3 V
The difference from offset 8,
SPD-H8 SP8 = 3 V, 8 cm mode, CLV = 3 V
SLDost SLEQ = VR, the difference from VR
SLDof SLOF = High
SLCo SLC
SCIo SCI, the difference from VR
SCIvthH SCI, the difference from VR
SCIvthL SCI, the difference from VR
DEFvth
The difference between the LF2 voltage when DEF is
detected with RF = 1.9 V and the LF2 voltage when
RF = 1.9 V.
DEF-H
DEF-L
LDS The LDS voltage such that LDD = 1.5 V
LDDof LDD
Ratings
Unit
min typ max
–40
–40
–40
0.35
0.10
0
0
0
0.50
0.20
+40
+40
+40
0.65
0.30
mV
mV
mV
V
V
–80
–40
1.0
–40
90
–190
0.20
2.5
120
2.7
0
0
1.5
0
140
–140
0.35
2.9
0
170
2.9
+80
+40
2.0
+40
190
–90
0.50
0.5
220
mV
mV
V
mV
mV
mV
V
V
V
mV
V
Pin Functions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Pin
FIN2
FIN1
E
F
TB
TE
TE
TESI
SCI
TH
TA
TD
TD
JP
TO
(NC)
FD
FD
FA
FA
FE
FE
SP
SPG
Function
Pickup photodiode (focus, RF) connection
Pickup photodiode (focus, RF) connection
Pickup photodiode (tracking) connection
Pickup photodiode (tracking) connection
TE signal DC component input. Pickup photodiode (tracking) connection
TE signal gain setting resistor connection. A resistor is connected between this pin and TE.
TE signal output
TES comparator input. Takes the bandpass filtered TE signal as its input.
Shock detection input
Tracking gain time constant setting
TA amplifier output
In conjunction with the TD and VR pins, used to form the tracking phase compensation circuit constant
Tracking phase compensation setting
Track jump signal amplitude setting
Tracking control signal output
No connection
Focusing control signal output
In conjunction with the FD and FA pins, used to form the focusing phase compensation circuit constant
In conjunction with the FD- and FA- pins, used to form the focusing phase compensation circuit constant
In conjunction with the FA and FE pins, used to form the focusing phase compensation circuit constant
FE signal output
FE signal gain setting resistor connection. A resistor is connected between this pin and FE.
CLV pin input signal inverted output
Gain setting resistor connection (12 cm spindle mode)
Continued on next page.
No. 6125-3/17