ICs for Compact Disc/CD-ROM Player
1
AN8839NSB
CD-DA head amplifier IC for 3-beam system optical pick-up
s
Overview
The AN8839NSB is a head amplifier IC for digital
servo. It can configure an efficient CD system in combi-
nation with the MN6627XX series, and allows a full-
automatic adjustment of tracking balance-gain-offset and
focus balance-gain-offset with fewer external parts.
s
Features
Operating supply voltage V
CC
=
2.4 V to 5.5 V
Balance adjustment function built-in
Focus error amp./tracking error amp.
OFTR/BDO detection
Standby function built in
APC amp.
s
Applications
CD player
SSOP028-P-0375
Unit: mm
(0.45)
0.30.1
11.60.3
2.00.2
0.9
0.10.1
0.15
0.8
9.30.3
7.20.3
0.3
1
14
15
28
AN8839NSB
ICs for Compact Disc/CD-ROM Player
2
s
Block Diagram
27
TBAL
22
TEN
28
FBAL
F-ch.
VCB
A
E-ch.
Sub-
traction
B-ch.
Band
gap
23
TEOUT
16
PDOWN
21
N.C.
18
N.C.
A-ch.
VCB
A
9
RFIN
15
RFDET
Sub-
traction
RF
detection
12
BDO
BDO
detection
17
OFTR
10
CSBRT
19
ENV
11
CEA
OFTR
detection
3TENV
6
LPD
7
LD
13
LDON
14
GND
26
V
REF
V
CC
3
FEOUT
24
FEN
25
N.C.
20
F
2
PDF
E
1
PDE
B
5
PDB
8
RF
A
4
PD
A
ICs for Compact Disc/CD-ROM Player
AN8839NSB
3
Pin No.
Description
15
NRFDET output pin
16
Power-down input pin
17
OFTR output pin
18
N.C.
19
3TENV output pin
20
N.C
21
N.C
22
TE amp. input pin
23
TE amp. output pin
24
FE amp. output pin
25
FE amp. input pin
26
V
REF
output pin
27
TBAL control pin
28
FBAL control pin
s
Pin Descriptions
Pin No.
Description
1
Tracking signal input pin 1
2
Tracking signal input pin 2
3
Power supply pin
4
Focus signal input pin 1
5
Focus signal input pin 2
6
APC amp. input pin
7
APC amp. output pin
8
RF adding output pin
9
Input pin for the detection circuits
10
Capacitor connection pin for OFTR
11
Capacitor connection pin for HPF amp.
12
BDO output pin
13
APC control pin
14
GND pin
Parameter
Symbol
Range
Unit
Supply voltage
V
CC
2.4 to 5.5
V
s
Recommended Operating Range
Parameter
Symbol
Rating
Unit
Supply voltage
V
CC
5.8
V
Supply current
I
CC
20
mA
Power dissipation
P
D
116
mW
Operating ambient temperature
*
T
opr
-
20 to
+
75
C
Storage temperature
*
T
stg
-
55 to
+
125
C
s
Absolute Maximum Ratings
Note) *: Except for the operating ambient temperature and storage temperature, all ratings are for T
a
=
25
C.
AN8839NSB
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
I
TOT
V
CC
=
3 V
4.0
6.0
8.0
mA
No load current at power down
PDI
TOT
V
CC
=
3 V
300
A
V
REF
output pin
V
REF
V
CC
=
3 V
1.37
1.50
1.63
V
Focus error amplification
Focus error amp.
V
FO-OF
V
CC
=
3 V
-
100
0
100
mV
output offset voltage
Focus error offset balance
V
FO-OFB
V
CC
=
3 V
-
120
0
120
mV
crosstalk amount
V
FB
=
V
REF
0.375 V
Focus error amp.
G
FO1
V
CC
=
3 V
10.7
13.2
15.7
dB
V-V conversion gain
V
FB
=
V
REF
Focus error amp.
G
FO2
V
CC
=
3 V
-
1.5
0
1.5
dB
V-V conversion relative gain
V
FB
=
V
REF
Focus balance
B
FO1-H
V
CC
=
3 V
1.29
1.49
1.69
variable range 1
-
H
V
FB
=
V
REF
+
0.375 V
Focus balance
B
FO1-L
V
CC
=
3 V
0.25
0.5
0.75
variable range 1
-
L
V
FB
=
V
REF
-
0.375 V
Focus balance
B
FO2-H
V
CC
=
3 V
0.25
0.5
0.75
variable range 2
-
H
V
FB
=
V
REF
+
0.375 V
Focus balance
B
FO2-L
V
CC
=
3 V
1.29
1.49
1.69
variable range 2
-
L
V
FB
=
V
REF
-
0.375 V
Tracking error amplification
Tracking error amp.
V
TR-OF
V
CC
=
3 V
-
97
0
97
mV
output offset voltage
Tracking error offset balance
V
TR-OFB
V
CC
=
3 V
-
120
0
120
mV
crosstalk amount
V
TB
=
V
REF
0.375V
Tracking error amp.
R
TR1
V
CC
=
3 V
580
750
920
k
I
-
V conversion gain
V
TB
=
V
REF
Tracking error amp.
R
TR2
V
CC
=
3 V
-
18
0
18
%
I
-
V conversion relative gain
V
TB
=
V
REF
Tracking balance
B
TR1-H
V
CC
=
3 V
0.77
0.83
0.9
variable range 1
-
H
V
TB
=
V
REF
+
0.375 V
Tracking balance
B
TR1-L
V
CC
=
3 V
1.07
1.17
1.27
variable range 1
-
L
V
TB
=
V
REF
-
0.375 V
Tracking balance
B
TR2-H
V
CC
=
3 V
1.07
1.17
1.27
variable range 2
-
H
V
TB
=
V
REF
+
0.375 V
Tracking balance
B
TR2-L
V
CC
=
3 V
0.77
0.83
0.9
variable range 2
-
L
V
TB
=
V
REF
-
0.375 V
TEMUTE operation 1
V
TEM
V
CC
=
3 V
-
125
0
125
mV
ICs for Compact Disc/CD-ROM Player
AN8839NSB
5
s
Electrical Characteristics at T
a
=
25
C (continude)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
RF amplification
RF amp. offset voltage
V
RF-OF
V
CC
=
3 V
-
910
-
710
-
510
mV
RF amp. transfer gain
G
RF
V
CC
=
3 V
7.7
9.3
10.9
dB
RF-amp.
G
RFF
V
CC
=
3 V
-
2.8
-
0.6
1.6
dB
frequency characteristics
*
f
=
500 kHz, 3 MHz
RF-amp.
G
EQ1
V
CC
=
3 V
-
0.8
1.0
2.9
dB
EQ characteristics
*
f
=
500 kHz, 1.5 MHz
RF-amp. capable drive current
I
RFO
V
CC
=
3 V
220
A
RF detection
RFDET det. operation
V
NRF
V
CC
=
3 V, f
=
500 kHz
88
132
176
mV[p-p]
RFDET high-level
V
NRF-H
V
CC
=
3 V, f
=
500 kHz
2.6
V
RFDET low-level
V
NRF-L
V
CC
=
3 V, f
=
500 kHz
0.4
V
BDO
BDO detection level
V
BDO
V
CC
=
3 V
-
63
-
37
-
11
mV
BDO high-level
V
BDO-H
f
=
5 kHz, 170 mV[p-p],
V
CC
=
3 V
2.6
V
BDO low-level
V
BDO-L
f
=
5 kHz, 170 mV[p-p],
V
CC
=
3 V
0.4
V
OFTR
OFTR detection current
I
CSOFTR
V
CC
=
3 V
1.03
1.45
1.87
A
OFTR high-level
V
OFT-H
V
CC
=
3 V,
f
=
5 kHz, 700 mV[p-p]
2.6
V
OFTR low-level
V
OFT-L
V
CC
=
3 V,
f
=
5 kHz, 700 mV[p-p]
0.4
V
LD APC
APC operating voltage
V
APC
V
CC
=
3 V
147
170
193
mV
3TENV
ENV-amp. offset voltage
V
ENV-OF
V
CC
=
3 V
-
125
0
125
mV
CEA-ENV
G
CENV
V
CC
=
3 V
6
7.6
9.2
times
transfer characteristics
CEA input impedance
Z
CEA
V
CC
=
3 V
8.1
10.5
12.9
k
ENV output impedance
Z
ENV
V
CC
=
3 V
8.1
10.5
12.9
k
ENV amp. operation
V
OP-ENV
V
CC
=
3 V, f
=
800 kHz, AM modulation
70
100
130
mV[p-p]
Focus error amp.
Focus error amp.
X
FEDZ1
V
CC
=
3 V
-
10
0
10
mV
dead zone width 1
V
FB
=
V
REF
Focus error amp.
X
FEDZ2
V
CC
=
3 V
-
10
0
10
mV
dead zone width 2
V
FB
=
V
REF
Focus error amp.
X
FEDZ1
V
CC
=
3 V
-
8
0
8
mV
relative dead zone width
V
FB
=
V
REF
Note) *: The values mentioned above are subject to change according to the state of a printed circuit board, a socket, etc.
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