ICs for Compact Disc/CD-ROM Player
1
AN8847SB
Head amplifier IC for CD-ROM drive (for 32 times speed or more)
s
Overview
The AN8847SB is a head amplifier IC for
digital servo. It can configure an efficient CD-ROM
system in combination with the MN662753, 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, high
band RF amp. and AGC which meet CAV playback
with 32 times speed or more.
s
Features
Variable equalizer which meets CAV playback
with 32 times speed or more.
Wide band RF amp. and AGC (f
C
=
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
+
16.9 dB)
OFTR/BDO detection
APC amp.
s
Applications
CD/CD-ROM drive
SSOP036-P-0450A
Unit: mm
8.40.3
0.5
0.10.1
11.930.3
2.850.2
15.20.3
36
19
1
18
0.30.11
0.8
1.300.25
1.300.25
Seating plane
0.2
+0.10
0.05
AN8847SB
ICs for Compact Disc/CD-ROM Player
2
s
Block Diagram
12
3TOUT
11
CEA
17
NRFDET
10
ARF
9
CAGC
8
RFC
7
EQCTL
6
RFOUT
4
RFN
LDON
19
GCTRL
28
FBAL
29
TEN
24
TEOUT
25
TBAL
30
V
CC2
23
V
CC1
21
GND
18
RV
CC
3
RGND
5
V
REF1
20
BDO
ENV
detection
RF A
G
C
BCA
RFDET
AC
EQ
ADD amp.
Amp.
32
35
36
V
REF2
22
PD
1
LD
2
FEOUT
27
FEN
26
OFTR
16
COFTR
15
BDO
14
CBDO
13
OFTR
Standby
Amp.
BCA
GCA
ADD
amp.
Amp.
GCA
33
34
ADD
amp.
31
Amp.
BCA
BCA
GCA
GCA
ICs for Compact Disc/CD-ROM Player
AN8847SB
3
Pin No.
Description
18
GND pin
19
APC & standby control pin
20
V
REF1
output pin
21
Power supply pin 1
22
V
REF2
output pin
23
Power supply pin 2
24
TE amp. inverted input pin
25
TE amp. output pin
26
FE amp. inverted input pin
27
FE amp. output pin
28
GCTL 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
s
Pin Descriptions
Pin No.
Description
1
APC amp. input pin
2
APC amp. output pin
3
Power supply pin (R)
4
RF addition amp. inverted input pin
5
GND pin (R)
6
RF addition amp. output pin
7
EQ characteristics control pin
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
Parameter
Symbol
Rating
Unit
Supply voltage R
*1
V
CCR
5.8
V
Supply voltage 1
*1
V
CC1
5.8
V
Supply voltage 2
*1
V
CC2
5.8
V
Supply current R
*1
I
CCR
97.1
mA
Supply current 1
*1
I
CC1
7.4
mA
Supply current 2
*1
I
CC2
2.43
mA
Power dissipation
*1, *2
P
D
403
mW
Operating ambient temperature
*1
T
opr
-
20 to
+
75
C
Storage temperature
*1
T
stg
-
55 to
+
125
C
s
Absolute Maximum Ratings
Note) *1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for T
a
=
25
C.
*2: The value for the independent package (without a heat sink) at T
a
=
75
C.
Parameter
Symbol
Range
Unit
Supply voltage R
V
CCR
4.5 to 5.5
V
Supply voltage 1
V
CC1
4.5 to 5.5
V
Supply voltage 2
V
CC2
3.0 to 5.5
V
s
Recommended Operating Range
AN8847SB
ICs for Compact Disc/CD-ROM Player
4
s
Electrical Characteristics at T
a
=
25
C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Current consumption with no load R
I
TOTALR
V
CC1
=
5 V, V
CC2
=
3.3 V
49.4
70.6
91.8
mA
V
EQCTL
=
V
REF2
+
0.75 V
Current consumption with no load 1
I
TOTAL1
V
CC1
=
5 V, V
CC2
=
3.3 V
3.8
5.4
7.0
mA
V
EQCTL
=
V
REF2
+
0.75 V
Current consumption with no load 2
I
TOTAL2
V
CC1
=
5 V, V
CC2
=
3.3 V
1.24
1.77
2.30
mA
V
REF1
output voltage
V
REF1
V
CC1
=
5 V, V
CC2
=
3.3 V
2.27
2.50
2.73
V
V
REF2
output voltage
V
REF2
V
CC1
=
5 V, V
CC2
=
3.3 V
1.50
1.65
1.80
V
Focus error amp.
Focus error amp.
V
FO
-
OF
V
CC1
=
5 V, V
CC2
=
3.3 V
-
90
0
90
mV
output offset voltage
Focus error offset balance
V
FO
-
OFB
V
CC1
=
5 V, V
CC2
=
3.3 V
-
150
0
150
mV
crosstalk amount
V
FB
=
V
REF2
0.5 V
Focus error amp.
G
FO
V
CC1
=
5 V, V
CC2
=
3.3 V
12.3
14.4
16.5
dB
V-V conversion gain
V
GC
=
V
REF2
-
0.75 V
Focus error amp.
G
FO
V
CC1
=
5 V, V
CC2
=
3.3 V
-
1.5
0
1.5
dB
V-V conversion relative gain
V
GC
=
V
REF2
-
0.75 V
Focus error amp.
B
FO1
-
H
V
CC1
=
5 V, V
CC2
=
3.3 V
1.08
1.35
1.62
balance output 1
-
H
V
FB
=
V
REF2
+
0.5 V
Focus error amp.
B
FO1
-
L
V
CC1
=
5 V, V
CC2
=
3.3 V
0.45
0.65
0.85
balance output 1
-
L
V
FB
=
V
REF2
-
0.5 V
Focus error amp.
B
FOH
V
CC1
=
5 V, V
CC2
=
3.3 V
4.35
6.35
8.35
dB
balance relative output 2
-
H
V
FB
=
V
REF2
+
0.5 V
Focus error amp.
B
FOL
V
CC1
=
5 V, V
CC2
=
3.3 V
-
8.35
-
6.35
-
4.35
dB
balance relative output 2
-
L
V
FB
=
V
REF2
-
0.5 V
Focus error amp.
G
FOF
V
CC1
=
5 V, V
CC2
=
3.3 V
-
4.5
-
3.0
-
1.5
dB
frequency characteristics
f
=
3 kHz, 60 kHz
Focus error amp.
B
FO4
V
CC1
=
5 V, V
CC2
=
3.3 V
3.3
4.3
5.3
GCTRL gain ratio
4
V
GC
=
V
REF2
Tracking error amp.
Tracking error amp.
V
TR
-
OF
V
CC1
=
5 V, V
CC2
=
3.3 V
-
60
0
60
mV
output offset voltage
Tracking error offset balance
V
TR
-
OFB
V
CC1
=
5 V, V
CC2
=
3.3 V
-
200
0
200
mV
crosstalk amount
V
TB
=
V
REF2
0.5 V
Tracking error amp.
G
TR
V
CC1
=
5 V, V
CC2
=
3.3 V
12.2
14.3
16.4
dB
V
-
V conversion gain
V
GC
=
V
REF2
-
0.75 V
Tracking error amp.
G
TR
V
CC1
=
5 V, V
CC2
=
3.3 V
-
1.5
0
1.5
dB
V
-
V conversion relative gain
V
GC
=
V
REF2
-
0.75 V
Tracking error amp.
B
TR1
-
H
V
CC1
=
5 V, V
CC2
=
3.3 V
0.45
0.65
0.85
balance output 1
-
H
V
TB
=
V
REF2
+
0.5 V
Tracking error amp.
B
TR1
-
L
V
CC1
=
5 V, V
CC2
=
3.3 V
1.08
1.35
1.62
balance output 1
-
L
V
TB
=
V
REF2
-
0.5 V
ICs for Compact Disc/CD-ROM Player
AN8847SB
5
s
Electrical Characteristics at T
a
=
25
C (continude)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Tracking error amp. (continued)
Tracking error amp.
B
TRH
V
CC1
=
5 V, V
CC2
=
3.3 V
-
8.35
-
6.35
-
4.35
dB
balance relative output 2
-
H
V
TB
=
V
REF2
+
0.5 V
Tracking error amp.
B
TRL
V
CC1
=
5 V, V
CC2
=
3.3 V
4.35
6.35
8.35
dB
balance relative output 2
-
L
V
TB
=
V
REF2
-
0.5 V
Tracking error amp.
G
TRF
V
CC1
=
5 V, V
CC2
=
3.3 V
-
4.5
0
dB
frequency characteristics
f
=
30 kHz, 500 kHz
Tracking error amp.
B
TR4
V
CC1
=
5 V, V
CC2
=
3.3 V
3.3
4.3
5.3
GCTRL gain ratio
4
V
GC
=
V
REF2
RF addition amp.
RF addition amp.
V
RAOF
V
CC1
=
5 V, V
CC2
=
3.3 V
-
200
0
200
mV
output offset voltage
RF addition amp. addition gain
G
RAD
V
CC1
=
5 V, V
CC2
=
3.3 V
-
1.5
0
1.5
dB
RF addition amp.
G
RAD1
V
CC1
=
5 V, V
CC2
=
3.3 V
-
1.0
0
1.0
dB
addition relative gain 1
RF addition amp.
G
RAD2
V
CC1
=
5 V, V
CC2
=
3.3 V
-
1.0
0
1.0
dB
addition relative gain 2
RF addition amp.
G
RAD3
V
CC1
=
5 V, V
CC2
=
3.3 V
-
1.0
0
1.0
dB
addition relative gain 3
RF addition amp.
G
RADA
V
CC1
=
5 V, V
CC2
=
3.3 V
10.5
12.0
13.5
dB
full-addition gain
RF addition amp. full-addition
G
RADDF
V
CC1
=
5 V, V
CC2
=
3.3 V
-
2.88
0.12
3.12
dB
frequency characteristics
*
f
=
500 kHz, 40 MHz
Variable EQ characteristics
EQ characteristics
1
-
1
*
G
EQ1
-
1
f
=
10 kHz, 100 kHz
-
1.5
0
1.5
dB
V
EQCTL
=
V
REF2
-
0.75 V
EQ characteristics
1
-
3
*
G
EQ1
-
3
f
=
1.4 MHz
2.5
4.0
5.5
dB
V
EQCTL
=
V
REF2
-
0.75 V
EQ characteristics
32
-
1
*
G
EQ32
-
1
f
=
2 MHz
-
1.5
0
1.5
dB
V
EQCTL
=
V
REF2
+
0.75 V
EQ characteristics
32
-
3
*
G
EQ32
-
3
f
=
32 MHz
0.5
2.0
3.5
dB
V
EQCTL
=
V
REF2
+
0.75 V
AGC
AGC max. gain
G
MAGC
f
=
500 kHz, V
IN
=
20 mV[p-p]
20.0
23.0
26.0
dB
AGC operating gain
G
AGC
f
=
500 kHz, V
IN
=
500 mV[p-p]
3.0
6.0
9.0
dB
AGC compression factor
G
AGC
f
=
500 kHz, V
IN
=
100 mV[p-p]
-
1.97
0.53
3.03
dB
Note) *: The values mentioned above are subject to change according to the state of a printed circuit board, a socket, etc.
PDF 
ZIP