ICs for Compact Disc/CD-ROM Player
AN8882SB
Head amplifier IC for CD-ROM drive (for 32 times speed or more)
■ Overview
The AN8882SB is a head amplifier IC for digital servo. It can configure an efficient CD-ROM system in combination with the MN662754, and allows a full-automatic adjustment of tracking bal- ance-gain-offset and focus balance-gain-offset with fewer external parts.
Built-in functions are a variable equalizer, wide band RF amp. and AGC which meet CAV playback with 32 times speed or more.
■ Features
•Variable equalizer which meets CAV playback with 32 times speed or more.
(6-step changeover)
•Wide band RF amp. and AGC (fC = 30 MHz or more (−3 dB))
•Balance adjustment function built-in Focus error amp./tracking error amp.
•CD-RW playback compatible. Variable gain
Focus error amp./tracking error amp. (to +12 dB)
•OFTR/BDO detection
•APC amp. (LD reference voltage changeover for CD-RW playback)
■ Applications
• CD/CD-ROM drive
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Unit: mm |
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15.2±0.3 |
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0.2 –0.05+0.10 |
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36 |
19 |
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8.4±0.3 |
11.93±0.3 |
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0.5 |
1 |
18 |
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1.30±0.25 |
1.30±0.25 |
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2.85±0.2 |
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0.3±0.11 |
0.8 |
0.1±0.1 |
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Seating plane |
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SSOP036-P-0450A |
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AN8882SB |
ICs for Compact Disc/CD-ROM Player |
■ Block Diagram
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CBDO |
BDO |
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COFTR |
OFTR |
FEN |
FEOUT |
REF2 |
REF1 |
LD |
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PD |
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V |
V |
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13 |
14 |
15 |
16 |
26 |
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27 |
22 |
20 |
2 |
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1 |
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BDO |
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REF2 |
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3TOUT |
12 |
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OFTR |
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V |
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5 |
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LDON |
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Standby |
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19 |
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ENV detection |
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TVREF2 |
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FLTCTL |
4 |
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CEA |
11 |
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TFLT |
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28 |
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GCTRL |
NRFDET |
17 |
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29 |
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FBAL |
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ARF |
10 |
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REF2 |
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25 |
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9 |
RF AGC |
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RFDET AC |
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FTEO |
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CAGC |
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V |
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24 |
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TEOUT |
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23 |
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8 |
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TEN |
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RFC |
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EQCTL |
7 |
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GCA BCA |
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GCA BCA |
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30 |
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EQCTL |
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TBAL |
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RFOUT |
6 |
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BCA |
BCA |
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21 |
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VCC2 |
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GCA |
GCA |
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3 |
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VCC1 |
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ADD amp. |
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ADD amp. |
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18 |
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ADD amp. |
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ADD amp. |
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GND |
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Amp. |
Amp. |
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36 |
35 |
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34 |
33 |
32 |
31 |
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A |
C |
B |
D |
F |
E |
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2
ICs for Compact Disc/CD-ROM Player |
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AN8882SB |
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■ Pin Descriptions |
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Pin No. |
Description |
Pin No. |
Description |
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1 |
APC amp. input pin |
18 |
GND pin |
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2 |
APC amp. output pin |
19 |
VREF2 buffer output pin |
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3 |
Power supply pin 1 |
20 |
VREF1 output pin |
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4 |
TE amp. analog SW & VREF2 buffer |
21 |
Power supply pin 2 |
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control pin |
22 |
VREF2 output pin |
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5 |
APC & standby control pin |
23 |
TE amp. inverted input pin |
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6 |
RF addition amp. output pin |
24 |
TE amp. output pin |
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7 |
EQ characteristics control pin |
25 |
TE amp. analog SW output pin |
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8 |
Capacitor connection pin for HPF of AGC input |
26 |
FE amp. inverted input pin |
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9 |
AGC loop filter connection pin |
27 |
FE amp. output pin |
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10 |
AGC output pin |
28 |
GCTL pin |
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11 |
Capacitor connection pin for HPF amp. |
29 |
FBAL control pin |
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12 |
3TENV output pin |
30 |
TBAL control pin |
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13 |
Capacitor connection pin for RF dark-side |
31 |
Tracking signal input pin 1 |
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envelope detection |
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32 |
Tracking signal input pin 2 |
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14 |
BDO output pin |
33 |
Focus signal input pin 4 |
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15 |
Capacitor connection pin for RF right-side |
34 |
Focus signal input pin 2 |
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envelope detection |
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35 |
Focus signal input pin 3 |
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16 |
OFTR output pin |
36 |
Focus signal input pin 1 |
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17NRFDET output pin
■Absolute Maximum Ratings
Parameter |
Symbol |
Rating |
Unit |
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Supply voltage 1 |
VCC1 |
5.8 |
V |
Supply voltage 2 |
VCC2 |
5.8 |
V |
Supply current 1 |
ICC1 |
55.3 |
mA |
Supply current 2 |
ICC2 |
3.4 |
mA |
Power dissipation |
PD |
340.46 |
mW |
Operating ambient temperature |
Topr |
−20 to +75 |
°C |
Storage temperature |
Tstg |
−55 to +125 |
°C |
Note) Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.
■ Recommended Operating Range
Parameter |
Symbol |
Range |
Unit |
Supply voltage 1 |
VCC1 |
4.5 to 5.5 |
V |
Supply voltage 2 |
VCC2 |
3.0 to 5.5 |
V |
3
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