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PDF AN8847 Data sheet ( Hoja de datos )
| Número de pieza | AN8847 | |
| Descripción | Head amplifier IC for CD-ROM drive for 32 times speed or more | |
| Fabricantes | Panasonic Semiconductor | |
| Logotipo |  |
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ICs for Compact Disc/CD-ROM Player
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 (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.
s Applications
• CD/CD-ROM drive
15.2±0.3
36 19
Unit: mm
0.2
+0.10
–0.05
1
18
1.30±0.25
1.30±0.25
0.3±0.11
0.8
Seating plane
SSOP036-P-0450A
1
1 page  
ICs for Compact Disc/CD-ROM Player
AN8847SB
s 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
Tracking error amp.
balance relative output 2−L
Tracking error amp.
frequency characteristics
BTRH
BTRL
GTRF
VCC1 = 5 V, VCC2 = 3.3 V
VTB = VREF2 +0.5 V
VCC1 = 5 V, VCC2 = 3.3 V
VTB = VREF2 − 0.5 V
VCC1 = 5 V, VCC2 = 3.3 V
f = 30 kHz, 500 kHz
−8.35 −6.35 −4.35 dB
4.35 6.35 8.35 dB
−4.5 0
dB
Tracking error amp.
GCTRL gain ratio × 4
RF addition amp.
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
RF addition amp.
addition relative gain 1
GRAD VCC1 = 5 V, VCC2 = 3.3 V
∆GRAD1 VCC1 = 5 V, VCC2 = 3.3 V
−1.5 0 1.5 dB
−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 GRADDF VCC1 = 5 V, VCC2 = 3.3 V
frequency characteristics *
f = 500 kHz, 40 MHz
−2.88 0.12 3.12 dB
Variable EQ characteristics
EQ characteristics × 1−1 *
EQ characteristics × 1−3 *
EQ characteristics × 32−1 *
EQ characteristics × 32−3 *
AGC
GEQ1−1 f = 10 kHz, 100 kHz
VEQCTL = VREF2 − 0.75 V
GEQ1−3 f = 1.4 MHz
VEQCTL = VREF2 − 0.75 V
GEQ32−1 f = 2 MHz
VEQCTL = VREF2 +0.75 V
GEQ32−3 f = 32 MHz
VEQCTL = VREF2 +0.75 V
−1.5 0 1.5 dB
2.5 4.0 5.5 dB
−1.5 0 1.5 dB
0.5 2.0 3.5 dB
AGC max. gain
AGC operating gain
AGC compression factor
GMAGC
GAGC
∆GAGC
f = 500 kHz, VIN = 20 mV[p-p]
f = 500 kHz, VIN = 500 mV[p-p]
f = 500 kHz, VIN = 100 mV[p-p]
20.0 23.0
3.0 6.0
−1.97 0.53
26.0
9.0
3.03
dB
dB
dB
Note) *: The values mentioned above are subject to change according to the state of a printed circuit board, a socket, etc.
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet AN8847.PDF ] | |
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