PANASONIC AN8847

ICs for Compact Disc/CD-ROM Player
AN8847SB
Head amplifier IC for CD-ROM drive (for 32 times speed or more)
■ Overview
Unit: mm
0.2 +0.10
–0.05
15.2±0.3
19
1
18
0.5
8.4±0.3
36
1.30±0.25
1.30±0.25
0.3±0.11
0.8
Seating plane
0.1±0.1
2.85±0.2
■ Features
• Variable equalizer which meets CAV playback
with 32 times speed or more.
• 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 +16.9 dB)
• OFTR/BDO detection
• APC amp.
11.93±0.3
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 balance-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.
SSOP036-P-0450A
■ Applications
• CD/CD-ROM drive
1
AN8847SB
ICs for Compact Disc/CD-ROM Player
PD
1
2
Amp.
20
LD
VREF1
15
COFTR
16
OFTR
26
FEN
27
FEOUT
22
VREF2
OFTR
Standby
ENV
detection
Amp.
25
4
GCA
6
Amp.
GCA
23
21
18
3
31
32
33
34
35
36
5
2
GCTRL
FBAL
TEN
TEOUT
TBAL
BCA
BCA
BCA
GCA
7
24
30
Amp.
RFN
8
ADD
amp.
RFOUT
9
BCA
EQCTL
LDON
10
GCA
RFC
29
ADD
amp.
CAGC
28
RFDET
AC
ARF
19
17
RF AGC
NRFDET
11
EQ
CEA
12
ADD
amp.
3TOUT
BDO
13
CBDO
14
BDO
■ Block Diagram
VCC2
VCC1
GND
RVCC
RGND
ICs for Compact Disc/CD-ROM Player
AN8847SB
■ Pin Descriptions
Pin No.
Description
Pin No.
Description
1
APC amp. input pin
18
GND pin
2
APC amp. output pin
19
APC & standby control pin
3
Power supply pin (R)
20
VREF1 output pin
4
RF addition amp. inverted input pin
21
Power supply pin 1
5
GND pin (R)
22
VREF2 output pin
6
RF addition amp. output pin
23
Power supply pin 2
7
EQ characteristics control pin
24
TE amp. inverted input pin
8
Capacitor connection pin for HPF of AGC input
25
TE amp. output pin
9
AGC loop filter connection pin
26
FE amp. inverted input pin
10
AGC output pin
27
FE amp. output pin
11
Capacitor connection pin for HPF amp.
28
GCTL pin
12
3TENV output pin
29
FBAL control pin
13
Capacitor connection pin for RF dark-side
30
TBAL control pin
envelope detection
31
Tracking signal input pin 1
14
BDO output pin
32
Tracking signal input pin 2
15
Capacitor connection pin for RF right-side
33
Focus signal input pin 4
envelope detection
34
Focus signal input pin 2
16
OFTR output pin
35
Focus signal input pin 3
17
NRFDET output pin
36
Focus signal input pin 1
■ Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Supply voltage R
*1
VCCR
5.8
V
Supply voltage 1
*1
VCC1
5.8
V
Supply voltage 2
*1
VCC2
5.8
V
Supply current R
*1
ICCR
97.1
mA
Supply current 1
*1
ICC1
7.4
mA
Supply current 2
*1
ICC2
2.43
mA
PD
403
mW
Topr
−20 to +75
°C
Tstg
−55 to +125
°C
Power dissipation
*1, *2
Operating ambient temperature
Storage temperature
*1
*1
Note) *1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.
*2: The value for the independent package (without a heat sink) at Ta = 75°C.
■ Recommended Operating Range
Parameter
Symbol
Range
Unit
Supply voltage R
VCCR
4.5 to 5.5
V
Supply voltage 1
VCC1
4.5 to 5.5
V
Supply voltage 2
VCC2
3.0 to 5.5
V
3
AN8847SB
ICs for Compact Disc/CD-ROM Player
■ Electrical Characteristics at Ta = 25°C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Current consumption with no load R ITOTALR VCC1 = 5 V, VCC2 = 3.3 V
VEQCTL = VREF2 +0.75 V
49.4
70.6
91.8
mA
Current consumption with no load 1
ITOTAL1 VCC1 = 5 V, VCC2 = 3.3 V
VEQCTL = VREF2 +0.75 V
3.8
5.4
7.0
mA
Current consumption with no load 2
ITOTAL2 VCC1 = 5 V, VCC2 = 3.3 V
1.24
1.77
2.30
mA
VREF1 output voltage
VREF1
VCC1 = 5 V, VCC2 = 3.3 V
2.27
2.50
2.73
V
VREF2 output voltage
VREF2
VCC1 = 5 V, VCC2 = 3.3 V
1.50
1.65
1.80
V
Focus error amp.
output offset voltage
VFO−OF VCC1 = 5 V, VCC2 = 3.3 V
−90
0
90
mV
Focus error offset balance
crosstalk amount
VFO−OFB VCC1 = 5 V, VCC2 = 3.3 V
VFB = VREF2 ±0.5 V
−150
0
150
mV
GFO
VCC1 = 5 V, VCC2 = 3.3 V
VGC = VREF2 − 0.75 V
12.3
14.4
16.5
dB
Focus error amp.
V-V conversion relative gain
∆GFO
VCC1 = 5 V, VCC2 = 3.3 V
VGC = VREF2 − 0.75 V
−1.5
0
1.5
dB
Focus error amp.
balance output 1−H
BFO1−H VCC1 = 5 V, VCC2 = 3.3 V
VFB = VREF2 +0.5 V
1.08
1.35
1.62

Focus error amp.
balance output 1−L
BFO1−L VCC1 = 5 V, VCC2 = 3.3 V
VFB = VREF2 − 0.5 V
0.45
0.65
0.85

6.35
Focus error amp.
Focus error amp.
V-V conversion gain
Focus error amp.
balance relative output 2−H
BFOH
VCC1 = 5 V, VCC2 = 3.3 V
VFB = VREF2 +0.5 V
4.35
8.35
dB
Focus error amp.
balance relative output 2−L
BFOL
VCC1 = 5 V, VCC2 = 3.3 V
VFB = VREF2 − 0.5 V
−8.35 −6.35 −4.35
dB
Focus error amp.
frequency characteristics
GFOF
VCC1 = 5 V, VCC2 = 3.3 V
f = 3 kHz, 60 kHz
−4.5
−3.0
−1.5
dB
Focus error amp.
GCTRL gain ratio × 4
BFO4
VCC1 = 5 V, VCC2 = 3.3 V
VGC = VREF2
3.3
4.3
5.3

Tracking error amp.
output offset voltage
VTR−OF VCC1 = 5 V, VCC2 = 3.3 V
−60
0
60
mV
Tracking error offset balance
crosstalk amount
VTR−OFB VCC1 = 5 V, VCC2 = 3.3 V
VTB = VREF2 ±0.5 V
−200
0
200
mV
GTR
VCC1 = 5 V, VCC2 = 3.3 V
VGC = VREF2 − 0.75 V
12.2
14.3
16.4
dB
Tracking error amp.
V−V conversion relative gain
∆GTR
VCC1 = 5 V, VCC2 = 3.3 V
VGC = VREF2 − 0.75 V
−1.5
0
1.5
dB
Tracking error amp.
balance output 1−H
BTR1−H VCC1 = 5 V, VCC2 = 3.3 V
VTB = VREF2 +0.5 V
0.45
0.65
0.85

Tracking error amp.
balance output 1−L
BTR1−L VCC1 = 5 V, VCC2 = 3.3 V
VTB = VREF2 − 0.5 V
1.08
1.35
1.62

Tracking error amp.
Tracking error amp.
V−V conversion gain
4
ICs for Compact Disc/CD-ROM Player
AN8847SB
■ Electrical Characteristics at Ta = 25°C (continude)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Tracking error amp. (continued)
Tracking error amp.
balance relative output 2−H
BTRH
VCC1 = 5 V, VCC2 = 3.3 V
VTB = VREF2 +0.5 V
−8.35 −6.35 −4.35
dB
Tracking error amp.
balance relative output 2−L
BTRL
VCC1 = 5 V, VCC2 = 3.3 V
VTB = VREF2 − 0.5 V
4.35
6.35
8.35
dB
Tracking error amp.
frequency characteristics
GTRF
VCC1 = 5 V, VCC2 = 3.3 V
f = 30 kHz, 500 kHz
−4.5

0
dB
Tracking error amp.
GCTRL gain ratio × 4
BTR4
VCC1 = 5 V, VCC2 = 3.3 V
VGC = VREF2
3.3
4.3
5.3

RF addition amp.
output offset voltage
VRAOF
VCC1 = 5 V, VCC2 = 3.3 V
−200
0
200
mV
RF addition amp. addition gain
GRAD
VCC1 = 5 V, VCC2 = 3.3 V
−1.5
0
1.5
dB
RF addition amp.
addition relative gain 1
∆GRAD1 VCC1 = 5 V, VCC2 = 3.3 V
−1.0
0
1.0
dB
RF addition amp.
addition relative gain 2
∆GRAD2 VCC1 = 5 V, VCC2 = 3.3 V
−1.0
0
1.0
dB
RF addition amp.
addition relative gain 3
∆GRAD3 VCC1 = 5 V, VCC2 = 3.3 V
−1.0
0
1.0
dB
RF addition amp.
full-addition gain
GRADA
VCC1 = 5 V, VCC2 = 3.3 V
10.5
12.0
13.5
dB
RF addition amp. full-addition
frequency characteristics *
GRADDF VCC1 = 5 V, VCC2 = 3.3 V
f = 500 kHz, 40 MHz
−2.88
0.12
3.12
dB
EQ characteristics × 1−1 *
GEQ1−1 f = 10 kHz, 100 kHz
VEQCTL = VREF2 − 0.75 V
−1.5
0
1.5
dB
EQ characteristics × 1−3 *
GEQ1−3 f = 1.4 MHz
VEQCTL = VREF2 − 0.75 V
2.5
4.0
5.5
dB
EQ characteristics × 32−1 *
GEQ32−1 f = 2 MHz
VEQCTL = VREF2 +0.75 V
−1.5
0
1.5
dB
EQ characteristics × 32−3 *
GEQ32−3 f = 32 MHz
VEQCTL = VREF2 +0.75 V
0.5
2.0
3.5
dB
GMAGC f = 500 kHz, VIN = 20 mV[p-p]
20.0
23.0
26.0
dB
3.0
6.0
9.0
dB
−1.97
0.53
3.03
dB
RF addition amp.
Variable EQ characteristics
AGC
AGC max. gain
AGC operating gain
AGC compression factor
GAGC
f = 500 kHz, VIN = 500 mV[p-p]
∆GAGC f = 500 kHz, VIN = 100 mV[p-p]
Note) *: The values mentioned above are subject to change according to the state of a printed circuit board, a socket, etc.
5
AN8847SB
ICs for Compact Disc/CD-ROM Player
■ Electrical Characteristics at Ta = 25°C (continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
NRF detection
NRF det. detection level
VRDA1
f = 500 kHz, VGC = VREF2 − 0.75 V
73
105
137 mV[p-p]
NRF det. high-level output
voltage
VRDAH
f = 500 kHz, VGC = VREF2 − 0.75 V
4.2


V
NRF det. low-level output
voltage
VRDAL
f = 500 kHz, VGC = VREF2 − 0.75 V


0.8
V
BDO
CBDO detection current
IBDO
VCC1 = 5 V, VCC2 = 3.3 V
VEQCTL = VREF2 − 0.5 V
1.07
1.49
1.91
µA
CBDO detection current ratio
BIBD4
VCC1 = 5 V, VCC2 = 3.3 V
VEQCTL = VREF2
4.4
5.4
6.4

BDO high-level output voltage
VBDOH
VCC1 = 5 V, VCC2 = 3.3 V
f = 5 kHz, rectangular wave
4.2


V
BDO low-level output voltage
VBDOL
VCC1 = 5 V, VCC2 = 3.3 V
f = 5 kHz, sine wave


0.8
V
IOFTR
VCC1 = 5 V, VCC2 = 3.3 V
VLDON = VREF2 − 0.5 V
1.07
1.49
1.91
µA
BIOFTR4 VCC1 = 5 V, VCC2 = 3.3 V
VLDON = VREF2
3.1
3.9
4.7

OFTR high-level output voltage VOFTRH VCC1 = 5 V, VCC2 = 3.3 V
f = 5 kHz, rectangular wave
4.2


V
OFTR low-level output voltage
VOFTRL VCC1 = 5 V, VCC2 = 3.3 V
f = 5 kHz, rectangular wave


0.8
V
OFTR sensitivity
VOFT_S f = 470 kHz, sine wave
VLDON = VREF2 +0.75 V
0

1.2
V
GCEA−ENV VCC1 = 5 V, VCC2 = 3.3 V
25.0
28.0
31.0
dB
OFTR
COFTR detection current
COFTR detection current ratio
3TENV
CEA to ENV
transfer characteristics
CEA input impedance
ZCEA
VCC1 = 5 V, VCC2 = 3.3 V
6.5
8.5
10.5
kΩ
ENV amp. output impedance
ZENV
VCC1 = 5 V, VCC2 = 3.3 V
6.0
8.0
10.0
kΩ
−120
0
120
mV
ENV amp. offset voltage
ENV amp. operation
VENVOF VCC1 = 5 V, VCC2 = 3.3 V
VENV
VCC1 = 5 V, VCC2 = 3.3 V
f = 800 kHz, AM modulation
210
420
630 mV[p-p]
VLD
VCC1 = 5 V, VCC2 = 3.3 V
139
170
201
mV
VLDON
VCC1 = 5 V, VCC2 = 3.3 V


− 0.35
V
ISTBY
VCC1 = 5 V, VCC2 = 3.3 V
VLDON = VREF2 − 0.75 V
3.61
5.16
6.71
mA
LD APC
LD operating reference voltage
LDON operating voltage
Standby
Current consumption at no load
in a standby mode
6
ICs for Compact Disc/CD-ROM Player
AN8847SB
12
1 PD
2 LD
20 VREF1
22 VREF2
27 FEOUT
Amp.
19 LDON
ENV
detection
Standby
3TOUT
CEA 11
26 FEN
OFTR
BDO
VREF2
15 COFTR
16 OFTR
13 CBDO
14 BDO
■ Application Circuit Example
VREF2
28
GCTRL
29 FBAL
NRFDET 17
VREF2
24 TEN
Amp.
25
BCA
30
BCA
BCA
7
GCA
EQCTL
EQ
VREF2
BCA
VREF1 RFC 8
GCA
CAGC 9
RFDET
AC
RF AGC
ARF 10
GCA
Amp.
ADD
amp.
VREF1
ADD
amp.
ADD
amp.
RFOUT 6
Amp.
GCA
23
4
18
3
E 31
VREF2
VCC2
VCC1
GND
RVCC
RGND
E
F 32
F
VREF1 D 33
B 34
B+D
A+C
VREF1
C 35
5
A 36
RFN
21
TEOUT
TBAL
7