Panasonic AN8849SB Datasheet
ICs for Compact Disc/CD-ROM Player
AN8849SB
Head amplifier IC for CD-ROM drive (for 24 times speed or more)
■ Overview
The AN8849SB is a head amplifier IC for
digital servo. It can configure an efficient CD-ROM
system in combination with the MN662752, and
allows a full-automatic adjustment of tracking balance-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 24 times speed or more.
■ Features
• Variable equalizer which meets CAV playback
with 24 times speed or more CAV playback.
• Wide band RF amp. and AGC (f
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 +16.9 dB)
• OFTR/BDO detection
• APC amp.
= 20 MHz or
C
Unit: mm
+0.10
36 19
15.2±0.3
118
0.3±0.11 0.8
Seating plane
SSOP036-P-0450A
0.2
–0.05
8.4±0.3
11.93±0.3
1.30±0.25 1.30±0.25
2.85±0.2
0.1±0.1
0.5
■ Applications
• CD/CD-ROM drive
1
AN8849SB ICs for Compact Disc/CD-ROM Player
■ Block Diagram
3TOUT
CEA
NRFDET
ARF
CAGC
RFC
EQSW
RFOUT
RFN
12
11
17
10
9
8
6
5
3
13
ENV
detection
RF AGC
EQ
amp.
ADD
BDO
CBDO
14
BDO
COFTR
15
AC
RFDET
OFTR
16
OFTR
BCA
GCA
ADD
26
amp.
FEN
Amp.
FEOUT
27
BCA
GCA
ADD
22
amp.
REF2
V
20
BCA
GCA
Amp.
REF1
V
LD
2
Amp.
BCA
GCA
Amp.
1
19
28
29
21
23
Comp.
24
25
30
18
PD
7
4
LDON
GCTRL
FBAL
CROSS
CCRS
TEN
TEOUT
TBAL
V
CC2
V
CC1
GND
36
35
34
33
32
31
2
ICs for Compact Disc/CD-ROM Player AN8849SB
■ Pin Descriptions
Pin No. Description
1 APC amp. input pin
2 APC amp. output pin
3 RF addition amp. inverted input pin
4 Power supply pin 1
5 RF addition amp. output pin
6 EQ characteristics control pin
7 Power supply pin 2
8
Capacitor connection pin for HPF of AGC input
9 AGC loop filter connection pin
10 AGC output pin
11 Capacitor connection pin for HPF amp.
12 3TENV output pin
13 Capacitor connection pin for RF dark-side
envelope detection
14 BDO output pin
15 Capacitor connection pin for RF right-side
envelope detection
16 OFTR output pin
17 NRFDET output pin
Pin No. Description
18 GND pin
19 APC & masking control pin
20 V
output pin
REF1
21 CROSS output pin
22 V
output pin
REF2
23 Capacitor connection pin for CROSS
24 TE amp. inverted input pin
25 TE amp. output pin
26 FE amp. inverted input pin
27 FE amp. output pin
28 GCTRL pin
29 FBAL control pin
30 TBAL control pin
31 Tracking signal input pin 1
32 Tracking signal input pin 2
33 Focus signal input pin 4
34 Focus signal input pin 2
35 Focus signal input pin 3
36 Focus signal input pin 1
■ Absolute Maximum Ratings
Parameter Symbol Rating Unit
1
CC1
· I
*
*
*
*
CC1
1
1
1
*1, *
2
1
*
+ V
CC2
· I
CC2
V
CC1
V
CC2
I
CC1
I
CC2
P
D
1
*
T
opr
T
stg
5.8 V
5.8 V
55 mA
2.5 mA
333.5 mW
−20 to +75 °C
−55 to +125 °C
Supply voltage 1
Supply voltage 2
Supply current 1
Supply current 2
Power dissipation
Operating ambient temperature
Storage temperature
Note)*1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.
2: PD = V
*
■ Recommended Operating Range
Parameter Symbol Range Unit
Supply voltage 1 V
Supply voltage 2 V
Note) Apply voltage to satisfy V
CC2
− V
< 0.3 V.
CC1
CC1
CC2
4.5 to 5.5 V
3.0 to 5.5 V
3
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