Analog Signal Processor (ASP)
for CD players
Overview
The LA9241M is an analog signal processing and servo control
bipolar IC designed for use in compact disc players; a compact
disc player can be configured by combining this IC with a
CD-DSP such as the LC78622E and LC78620E, with a small
number of additional components required.
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: FE (pin 20)
.
Tracking offset auto cancel: TE (pin 7)
.
EF balance auto adjustment
.
RF level AGC function
.
Tracking servo gain RF level following function
.
Focus search smoothing setting pin: FSC (pin 46)
.
EF balance adjustment variable range setting pin: (pin 47)
.
Focus search mode switching pin: (pin 55)
Package Dimensions
unit : mm
3159-QFP64E
[LA9241M]
SANYO : QFP64E
Specifications
Maximum Ratings
at Ta = 25C, Pins 22, 45 = GND
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
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 5564
Monolithic Linear IC
LA9241M
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
13097HA(II)/83096HA(II) No.5564 - 1/21
Operating Conditions
at Pins 22, 45 = GND
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
5
V
Allowable operating supply voltage
V
CC
op
3.2 to 5.5
V
*
Operating Supply Voltage at Limit of Operating Temperature
at Pins 22, 45 = GND
Parameter
Symbol
Conditions
Ratings
Unit
Operating temperature
Topr2
10 to +75
C
Allowable operating supply voltage
V
CC
op2
3.0 to 5.5
V
Operating Characteristics
at Ta = 25C, Pins 22, 45 = GND, V
CC
(pins 56, 64) = 5 V
Parameter
Symbol
Conditions
min
typ
max
Unit
Current drain
I
CCO
V
CC
1 (pin 64) + V
CC
2 (pin 56)
22
32
42
mA
Reference voltage
V
REF
VR
2.3
2.5
2.7
V
[Interface]
CE-Vth
CEvth
CE
0.8
V
CL-Vth
CLvth
CL
0.8
V
DAT-Vth
DATvth
DAT
0.8
V
Maximum CL frequency
CLmax
500
kHz
[RF amplifier]
RFSM no signal voltage
RFSMo
1.35
1.60
1.85
V
Minimum gain
RFSM
G
min
FIN1, FIN2 : 1 M
-input, PH1 = 4 V
freq = 200 kHz, RFSM
14.0
12.5
11.0
dB
[Focus amplifier]
FDO gain
FD
G
FIN2 : 1 M
-input, FDO
3.5
5.0
6.5
dB
FDO offset
FDost
Difference from reference voltage, servo on
170
0
+170
mV
Off time offset
FDofost
Difference from reference voltage, servo off
40
0
+40
mV
Offset adjustment step
FEstep
FE
3
mV
F search voltage H1
FSmax1
FDO, FSS = GND
0.8
V
F search voltage L1
FSmin1
FDO, FSS = GND
0.8
V
F search voltage H2
FSmax2
FDO, FSS = V
CC
0.8
V
F search voltage L2
FSmin2
FDO, FSS = V
CC
0
V
[Tracking amplifier]
TE gain MAX
TE
G
max
f = 10 kHz, E: 1 M
-input, PH1 = 4 V
6.0
7.5
9.0
dB
TE gain MIN
TE
G
min
f = 10 kHz, E: 1 M
-input, PH1 = 1 V
0.5
+1.8
+4.0
dB
TE-3 dB
TEfc
E: 1 M
-input
60
kHz
TO gain
TO
G
TH
TO gain, THLD mode
4.0
6.0
8.0
dB
TGL offset
TGLost
Servo on, TGL = H, TO
250
0
+250
mV
TGH offset
TGHost
TGL = L, difference from TGL offset, TO
50
0
+50
mV
THLD offset
THLDost
THLD mode, difference from TGL offset, TO
50
0
+50
mV
Off 1 offset
OFF1ost
TOFF = H
50
0
+50
mV
Off 2 offset
OFF2ost
TOFF2 off (IF)
50
0
+50
mV
Offset adjustment step
TEstep
TE
30
mV
Balance range H
BAL-H
Gain E/F input, TB = 5 V, TBC = open
3.5
dB
Balance range L
BAL-L
Gain E/F input, TB = 0 V, TBC = open
3.5
dB
TOFF-VTH
TOFFvth
1.0
2.5
3.0
V
TGL-VTH
TGLvth
1.0
2.5
3.0
V
[PH]
No signal voltage
PHo
Difference from RFSM
0.85
0.65
0.45
V
[BH]
No signal voltage
BHo
Difference from RFSM
0.45
0.65
0.85
V
[DRF]
Detection voltage
DRFvth
Difference from VR at RFSM
0.60
0.35
0.20
V
Output voltage H
DRF-H
4.5
4.9
V
Output voltage L
DRF-L
0
+0.5
V
Continued on next page.
LA9241M
No.5564 - 2/21
Continued from preceding page.
Parameter
Symbol
Conditions
min
typ
max
Unit
[FZD]
Detection voltage 1
FZD1
FE, difference from VR
0
+0.2
V
Detection voltage 2
FZD2
FE, difference from VR
0
V
[HFL]
Detection voltage
HFLvth
Difference from VR at RFSM
0.55
0.4
0.25
V
Output voltage H
HFL-H
4.5
4.9
V
Output voltage L
HFL-L
0
+0.5
V
[TES]
Detection voltage LH
TES-LH
TESI, difference from VR
0.15
0.10
0.05
V
Detection voltage HL
TES-HL
TESI, difference from VR
0.05
0.10
0.15
V
Output voltage H
TES-H
4.5
4.9
V
Output voltage L
TES-L
0
+0.5
V
[JP]
Output voltage H
JP-H
Difference from JP
+
= 0 V, JP
= 0 V at JP
+
= 0 V,
JP
= 5 V, TO
0.35
0.5
0.65
V
Output voltage L
JP-L
Difference from JP
+
= 0 V, JP
= 0 V at JP
+
= 5 V,
JP
= 0 V, TO
0.65
0.5
0.35
V
[Spindle amplifier]
Offset 12
SPD12ost
Difference from VR at SPD, 12 cm mode
40
0
+40
mV
Offset 8
SPD8ost
Difference from VR at SPD, 8 cm mode
40
0
+40
mV
Offset off
SPDof
Difference from VR at SPD, OFF mode
30
0
+30
mV
Output voltage H12
SPD-H12
Difference from offset-12, 12 cm mode
CV
+
= 5 V, CV
= 0 V
0.75
1.0
1.25
V
Output voltage L12
SPD-L12
Difference from offset-12 , 12 cm mode
CV
+
= 0 V, CV
= 5 V
1.25
1.0
0.75
V
Output voltage H8
SPD-H8
Difference from offset-8, 8 cm mode
CV
+
= 5 V, CV
= 0 V
0.35
0.5
0.65
V
[Sled amplifier]
SLEQ offset
SLEQost
Difference from TO at SLEQ
30
0
+30
mV
Offset SLD
SLDost
SLEQ = VR, Difference from VR
100
0
+100
mV
Offset off
SLDof
Off mode
40
0
+40
mV
Off VTH
SLOFvth
SLOF
1.0
1.4
2.0
V
[SLC]
No signal voltage
SLCo
SLC
2.25
2.5
2.75
V
[Shock]
No signal voltage
SCIo
SCI, difference from VR
40
0
+40
mV
Detection voltage H
SCIvthH
SCI, difference from VR
60
100
140
mV
Detection voltage L
SCIvthL
SCI, difference from VR
140
100
60
mV
[DEF]
Detection voltage
DEFvth
Difference between LF2 voltage when RFSM =
3.5 V and DEF is detected and LF2 voltage when
RFSM = 3.5 V
0.20
0.35
0.50
V
Output voltage H
DEF-H
4.5
4.9
V
Output voltage L
DEF-L
0
+0.5
V
[APC]
Reference voltage
LDS
LDS voltage at which LDD = 3 V
160
190
220
mV
Off voltage
LDDof
LDD
3.9
4.3
4.6
V
LA9241M
No.5564 - 3/21
Pin Functions
Pin
No.
Symbol
Contents
1
FIN2
Pickup photodiode connection pin. Added to FIN1 pin to generate the RF signal, subtracted from FIN1 pin to generate
the FE signal.
2
FIN1
Pickup photodiode connection pin.
3
E
Pickup photodiode connection pin. Subtracted from F pin to generate the TE signal.
4
F
Pickup photodiode connection pin.
5
TB
TE signal DC component input pin.
6
TE
-
Pin which connects the TE signal gain setting resistor between this pin and TE pin.
7
TE
TE signal output pin.
8
TESI
TES (Track Error Sense) comparator input pin. The TE signal is input through a bandpass filter.
9
SCI
Shock detection input pin.
10
TH
Tracking gain time constant setting pin.
11
TA
TA amplifier output pin.
12
TD
-
Pin for configuring the tracking phase compensation constant between the TD and VR pins.
13
TD
Tracking phase compensation setting pin.
14
JP
Tracking jump signal (kick pulse) amplitude setting pin.
15
TO
Tracking control signal output pin.
16
FD
Focusing control signal output pin.
17
FD
-
Pin for configuring the focusing phase compensation constant between the FD and FA pins.
18
FA
Pin for configuring the focusing phase compensation constant between the FD
-
and FA
-
pins.
19
FA
-
Pin for configuring the focusing phase compensation constant between the FA and FE pins.
20
FE
FE signal output pin.
21
FE
-
Pin which connects the FE signal gain setting resistor between this pin and FE pin.
22
AGND
Analog signal GND.
23
NC
No connection
24
SP
CV
+
and CV
-
pins input signal single-end output.
25
SPG
12-cm spindle mode gain setting resistor connection pin.
26
SP
-
Spindle phase compensation constant connection pin, along with the SPD pin.
27
SPD
Spindle control signal output pin.
28
SLEQ
Sled phase compensation constant connection pin.
29
SLD
Sled control signal output pin.
30
SL
-
Input pin for sled movement signal from microprocessor.
31
SL
+
Input pin for sled movement signal from microprocessor.
32
JP
-
Input pin for tracking jump signal from DSP.
33
JP
+
Input pin for tracking jump signal from DSP.
34
TGL
Input pin for tracking gain control signal from DSP. Gain is low when TGL is high.
35
TOFF
Input pin for tracking off control signal from DSP. Tracking servo is off when TOFF is high.
36
TES
Output pin for TES signal to DSP.
37
HFL
The High Frequency Level is used to determine whether the main beam is positioned over a bit or over the mirrored
surface.
38
SLOF
Sled servo off control input pin
39
CV
-
Input pin for CLV error signal from DSP.
40
CV
+
Input pin for CLV error signal from DSP.
41
RFSM
RF output pin.
42
RFS
-
RF gain setting and EFM signal 3T compensation constant setting pin, along with the RFSM pin.
43
SLC
Slice Level Control is an output pin that controls the data slice level used by the DSP for the RF waveform.
44
SLI
Input pin used by DSP for controlling the data slice level.
45
DGND
Digital system GND pin.
46
FSC
Focus search smoothing capacitor output pin.
47
TBC
Tracking Balance Control; EF balance adjustment variable range setting pin
48
NC
No connection
49
DEF
Disc defect detection output pin.
50
CLK
Reference clock input pin. 4.23 MHz signal from the DSP is input.
51
CL
Microprocessor command clock input pin.
Continued on next page.
LA9241M
No.5564 - 4/21
Continued from preceding page.
Pin
No.
Symbol
Contents
52
DAT
Microprocessor command data input pin.
53
CE
Microprocessor command chip enable input pin.
54
DRF
RF level detection output (Detect RF).
55
FSS
Focus Search Select; focus search mode (
search/+search vs. the reference voltage) switching pin
56
V
CC
2
Servo system and digital system V
CC
pin.
57
REFI
By-pass capacitor connection pin for reference voltage.
58
VR
Reference voltage output pin.
59
LF2
Disc defect detection time constant setting pin.
60
PH1
RF signal peak hold capacitor connection pin.
61
BH1
RF signal bottom hold capacitor connection pin.
62
LDD
APC circuit output pin.
63
LDS
APC circuit input pin.
64
V
CC
1
RF system V
CC
pin.
LA9241M
No.5564 - 5/21
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