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KA8309B
SERVO SIGNAL PROCESSOR
INTRODUCTION
The KA8309B is BiCMOS integrated circuit designed for
the servo control of the compact disc player application.
48 - QFP - 1010D
FEATURES
• Servo control functions;
(focus, tracking, seld servo control)
• Loop filter and VCO for EFM clock reproduction
PLL
• Provide function
Preventing sled runaway
Anti-shock
Spindle servo
Auto-sequencer
• Provide adjustable peak of focus search,
track jump and sled kick with external resistor
ORDERING INFORMATION
• Low power consumption
(100mW typ; – 5V, 80mW ; 5V)
• Single power supply, 5V
• Split power supply, – 5V
Device
Package
Operating Temperature
KA8309B
48-QFP-1010D
-20 C~+75 C
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KA8309B
SERVO SIGNAL PROCESSOR
BLOCK DIAGRAM
36
35
34
33
32
31
30
29
28
27
26
25
DVCC
37
LPF
LOOP
-FILTER
24
SLOAD
SPDLI
38
VCO
VIC
- +
23
SDATA
TTL/
CMOS
3.5V
REGULATOR
SPDLO
39
22
REST
21
DRCT
WDCK
40
SERIAL TO
PARALLEL
DECODER
FOK
41
TTL
CMOS
SEQUENCER
CMOS/
TTL
20
CNO
MRR
42
OUTPUT DECODER
TRACKING
GAIN
CONTROL
FOCUS
GAIN
CONTROL
TRACK JUMP
PEAK VALUE
CONTROL
SLED JUMP
PEAK VALUE
CONTROL
19
AVEE
DVEE
43
18
SENS
DFT
44
17
FSET
TKE
45
TRACKING
GAIN
CONTROL
TRACKING
PHASE
COMPEN
SATION
SLED JUMP
PEAK VALUE
CONTROL
16
STOP
TRACK JUMP
PEAK VALUE
CONTROL
15
SLEI
TZC
46
-
+ -
BPF
WINDOWS
COMPARATOR
ATS
47
14
SLEO
-
13
SLEN
FCE
48
FOCUS
GAIN
CONTROL
FOCUS
PHASE CO
MPENSATION
-
-
1
2
3
4
5
6
7
8
9
10
11
12
Fig. 1
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KA8309B
SERVO SIGNAL PROCESSOR
PIN DESCRIPTION
Pin No
Symbol
Description
1
CV
Center voltage.
2
HFGD
Reduce high frequency gain with capacitor connected between pin
2 and pin 3.
3
FS
High frequency gain of focus servo can be changed by switching
FS3 on or off.
4
LFR
Rising low frequency bandwidth of focus loop.
5
FSEO
Focus servo error output.
6
FSEI
Inverting input pin for focus amplifier.
7
FSCH
Time constant external pin to generate focus search waveform.
8
RTG
Time constant external pin to switch the tracking gain of high frequency.
9
TG
Provide time constant to change the high frequency tracking gain.
10
AV CC
Analog positive power supply.
11
TKEO
Tracking error output.
12
TKEI
Inverting input pin for tracking amplifier.
13
SLEN
Non-inverting input pin for tracking amplifier.
14
SLEO
Sled output.
15
SLEI
Inventing input pin for sled amplifier.
16
STOP
Pin for detecting a signal for the on/off limit switch of the
innermost part of the disc.
17
FSET
Setting the peak frequency of the focus, tracking phase
compensation and of the CLV LPF.
18
SENS
Output pin for FZC, AS, TZC, STOP and BUSY by command from
CPU.
19
AV EE
Analog negative power supply.
20
CNO
Track number count output.
21
DRCT
Control pin for one track jump.
22
REST
Reset input pin, reset at "L".
23
SDATA
Serial data input.
24
SLOAD
Latch input.
25
SCLK
Serial data transfer clock.
26
DGND
Digital ground.
27
BPF
Provide time constant for the loop filter.
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KA8309B
SERVO SIGNAL PROCESSOR
PIN DESCRIPTION (Continued)
Pin No
Symbol
Description
28
DPI
Input pin for detected phase.
29
ISET
Current is input, determining the peaks of focus search,
track jump, and sled kick.
30
FVC
External resistor to adjust free running frequency of VCO.
31
3.5V
Regulated output voltage.
32
864M
Output pin of 8.64MHZ VCO.
33
LOCK
Pin for the operation of the sled runaway prevention circuit at "L".
34
MDP
Pin for connecting the DSP.
35
MON
Pin for connecting the DSP.
36
FSW
Providing an external LPF time constant of the CLV servo.
37
DV CC
Digital positive power supply.
38
SPDLI
Inverting input for spindle servo amplifier.
39
SPDLO
Spindle servo error output.
40
WDCK
Clock input for auto-sequence.
41
FOK
Focus OK signal input pin.
42
MRR
Mirror signal input pin.
43
DV EE
Digital negative power supply.
44
DFT
Defect signal input pin.
45
TKE
Tracking error signal input pin.
46
TZC
Input pin for the zero cross tracking comparator.
47
ATS
Input pin for detect ATSC.
48
FCE
Input pin for focus error signal.
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Value
Unit
Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature
V CC -V EE
P D
T OPR
T STG
12
600
-20 ~ + 75
-55 ~ + 150
V
mW
C
C
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KA8309B
SERVO SIGNAL PROCESSOR
ELECTRICAL CHARACTERISTICS
(Ta =25 C, V CC =2.5V, V DD =2.5V, V EE = -2.5V, GND = 0V, unless otherwise specified)
Characteristic
No. Symbol
Test Conditions
Min
Typ
Max
Unit
Circuit Current 1
1
ICC 1
2
6
10
mA
Circuit Current 2
2
ICC 2
7
10
20
mA
Circuit Current 3
3
ICC 3
-2
-7
-13
mA
Circuit Current 4
4
ICC 4
-6
-9
-19
mA
DC Voltage Gain
5
G V (DC) 1
SG 48 = 10Hz, 200mV P-P
18.3
21
23.6
dB
Feed Through
6
G V (FF)
SG 48 = 10KHz, 40mV P-P
Gain difference between 08 and
00 of SD
-30
dB
Output Voltage 1
7
V O (FCS) 1
V 2 = 0.5V
1.96
V
Output Voltage 2
8
V O (FCS) 2
V 2 = 0.5V
-1.96
V
Output Voltage 3
9
V O (FCS) 3
V 2 = 0.5V
1.16
V
Output Voltage 4
10 V O (FCS) 4
V 2 = 0.5V
-1.16
V
Search Output Voltage 1 11 V O(SEARCH)1
-0.63
-0.55
-0.37
V
Search Output Voltage 2 12 V O(SEARCH)2
0.39
0.55
0.65
V
DC Voltage Gain
13 G V (DC) 2
SG 45 = 10HZ, 500mV P-P
12.9
14.6
17.8
dB
Feed Through
14
G V (TF)
SG =10KHz, 500mV P-P
Gain difference between 25 and
20 of SD
-37
dB
Output Voltage 1
15 V O (TCK) 1
V 8 = -1.5V
1.96
V
Output Voltage 2
16 V O (TCK) 2
V 8 =+1.5V
-1.96
V
Output Voltage 3
17 V O (TCK) 3
V 8 =-1.5V
1.15
V
Output Voltage 4
18 V O (TCK) 4
V 8 =+1.5V
-1.16
V
Jump Output Voltage 1
19 V O (JUMP) 1
-0.62
-0.55
-0.40
V
Jump Output Voltage 2
20 V O (JUMP) 2
0.41
0.55
0.62
V
DC Voltage Gain
21 G V (DC) 3
SG 3 =10Hz, 100mV P-P
20.6
22.5
24.4
dB
Output Voltage 1
22 V O (SLD) 1
V 7 = 0.4V
1.96
V
Output Voltage 2
23 V O (SLD) 2
V 7 = -0.4V
-1.96
V
Output Voltage 3
24 V O (SLD) 3
V 7 = 0.4V
1.16
V
Output Voltage 4
25 V O (SLD) 4
V 7 = -0.4V
-1.16
V
Feed Through
26
G V (SF)
SG = 10KHz, 200mV
Gain difference between 25 and
20 of SD
-32
dB
Kick Output Voltage 1
27 V O (KICK) 1
0.44
0.6
0.7
V
Kick Output Voltage 2
28 V O (KICK) 2
-0.7
-0.6
-0.43
V
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