HA12188AF PDF даташит
Спецификация HA12188AF изготовлена «Hitachi Semiconductor» и имеет функцию, называемую «Pre-Amplifier and Servo IC for Quadruple-Speed CD-ROM». |
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Детали детали
Номер произв | HA12188AF |
Описание | Pre-Amplifier and Servo IC for Quadruple-Speed CD-ROM |
Производители | Hitachi Semiconductor |
логотип |
30 Pages
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HA12188AF
Pre-Amplifier and Servo IC for Quadruple-Speed CD-ROM
ADE-207-183(Z)
1st. Edition
October 1995
Description
The typical values of built-in capacitances in this IC are reduced 10% compared with those in IC
HA12188F. The values of Electrical Characteristics of this IC are same as those of IC HA12188F.
Functions
• RF amplifier
• Focus error amplifier
• Tracking error amplifier
• FOK detector
• Mirror detector
• Defect detector
• APC amplifier
• Focus, tracking, and sled servo control
• Inner/outer direction detector
Features
• Built-in variable resistors for adjusting tracking error EF balance, tracking gain, and focus gain
• Single power supply
• Supports double and quadruple speeds
• Few external components
• FP-56 package
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HA12188AF
Block Diagram
VCC
42 41
40
RS2
39 38 37
RS1 RFS
–+
36 35
Bias
+ RF1
43 –
RF2
+
44 –
45
APC
46
+
47 –
+
–
+ TR1
48 –
TR2 BAL
+
49 –
VR
–
+
FE
VR
50
VR
51
–+
TE
52
53 +
–
54
FA
55
56
TZC
–
+
FS4
– FZC
+
Focus
bias
adj.
DS1
DS2
FS2
FLS
Phase
compen.
FS1
FSA
FPS – +
×2.7
1 2 34 5 6 7 8
9 10
34 33
32 31 30 29
Mirror
FOK
–
+
Defect
Logic
Input
I/F
Output
I/F
28 LDS
27 CLK
26 DATA
25 XLT
24 DC
23 XRST
22 SENS
21 COUT
20 DEFECT
or DRT
SLM
DRIV.
TM5 TM6
19
SSA
+–
18
Phase
THS compen.
TM2
TM3 TM4
17
TM7 TSA
TM1
TPS
TLS
–+
16
TAC
DRIV.
11 12
×2.7
13 14
15 VCC
FAC
DRIV.
• The states of the IC’s internal switches at XRST = “L” are shown at block diagram.
• The black dot symbol of transfer switch shows on state.
• The symbols “ ” mean connecting to VCC.
• The symbols “ ” mean connecting to pin 45.
Rev.1, Oct. 1995, page 2 of 35
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Pin Descriptions and Equivalent Circuits
Pin No. Symbol Equivalent Circuit
1 FH
470 k
3 TH
2 TSI
56 FSI
4 FLS
5 FLS
6 SGND —
7 FPS
90 k
30 k
8 FPS
9 FSA
10 FS1
20 k
11 TLS
20 k
33 k
HA12188AF
Function
Focus error hold signal output
Tracking error hold signal output
Tracking servo input
Focus servo input
Focus-servo low-frequency filter
resistor & capacitor connection
(FLS on)
Focus-servo low-frequency filter
capacitor connection (FLS off)
Servo ground
Resistor connection for programming
focus-servo phase compensation
(FPS off)
Resistor connection for programming
focus-servo phase compensation
(FPS on)
Focus servo output
FS1 voltage output
Tracking servo low-frequency filter
capacitor connection (TLS off)
Rev.1, Oct. 1995, page 3 of 35
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Номер в каталоге | Описание | Производители |
HA12188AF | Pre-Amplifier and Servo IC for Quadruple-Speed CD-ROM | Hitachi Semiconductor |
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