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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 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.
15.20.3 36 19 0.2 +0.10 -0.05
Unit: mm
11.930.3
8.40.3
1
18
1.300.25
2.850.2
1.300.25
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.
0.30.11 0.8 Seating plane
0.10.1
SSOP036-P-0450A
s Applications
* CD/CD-ROM drive
0.5
1
AN8847SB
s Block Diagram
ICs for Compact Disc/CD-ROM Player
15 COFTR 16 OFTR 26 FEN 27 FEOUT 22 VREF2
13 CBDO 14 BDO
VREF1
LD
20
2
BDO
3TOUT
12
OFTR
Amp.
1
PD
19
Standby
LDON
CEA
11
ENV detection
28 29
GCTRL FBAL
NRFDET ARF CAGC RFC
17 10
RF AGC RFDET AC
9 8
Amp.
24 25
TEN TEOUT
BCA
BCA
30
BCA BCA
TBAL
GCA
EQCTL RFOUT RFN
7 6
GCA
EQ
23
GCA GCA
VCC2 VCC1 GND RVCC RGND
21 18 3 5
ADD amp.
Amp.
36
35
34
33
32
2
31
Amp.
4
ADD amp.
ADD amp.
ICs for Compact Disc/CD-ROM Player
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 Description APC amp. input pin APC amp. output pin Power supply pin (R) RF addition amp. inverted input pin GND pin (R) RF addition amp. output pin EQ characteristics control pin Capacitor connection pin for HPF of AGC input AGC loop filter connection pin AGC output pin Capacitor connection pin for HPF amp. 3TENV output pin Capacitor connection pin for RF dark-side envelope detection 14 15 BDO output pin Capacitor connection pin for RF right-side envelope detection 16 17 OFTR output pin NRFDET output pin Pin No. 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 GND pin APC & standby control pin VREF1 output pin Power supply pin 1 VREF2 output pin Power supply pin 2 TE amp. inverted input pin TE amp. output pin FE amp. inverted input pin FE amp. output pin GCTL pin FBAL control pin TBAL control pin Tracking signal input pin 1 Tracking signal input pin 2 Focus signal input pin 4 Focus signal input pin 2 Focus signal input pin 3 Focus signal input pin 1 Description
AN8847SB
s Absolute Maximum Ratings
Parameter Supply voltage R Supply voltage 1 Supply voltage 2 Supply current R Supply current 1 Supply current 2
*1 *1 *1 *1 *1 *1 *1, *2 *1
Symbol VCCR VCC1 VCC2 ICCR ICC1 ICC2 PD Topr Tstg
Rating 5.8 5.8 5.8 97.1 7.4 2.43 403 -20 to +75 -55 to +125
Unit V V V mA mA mA mW C C
Power dissipation
Operating ambient temperature Storage temperature
*1
Note) *1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: The value for the independent package (without a heat sink) at Ta = 75C.
s Recommended Operating Range
Parameter Supply voltage R Supply voltage 1 Supply voltage 2 Symbol VCCR VCC1 VCC2 Range 4.5 to 5.5 4.5 to 5.5 3.0 to 5.5 Unit V V V 3
AN8847SB
s Electrical Characteristics at Ta = 25C
Parameter Symbol
ICs for Compact Disc/CD-ROM Player
Conditions
Min 49.4 3.8 1.24 2.27 1.50 -90 -150 12.3 -1.5 1.08 0.45 4.35
Typ 70.6 5.4 1.77 2.50 1.65
Max 91.8 7.0 2.30 2.73 1.80
Unit mA mA mA V V
Current consumption with no load R ITOTALR VCC1 = 5 V, VCC2 = 3.3 V VEQCTL = VREF2 +0.75 V Current consumption with no load 1 Current consumption with no load 2 VREF1 output voltage VREF2 output voltage Focus error amp. Focus error amp. output offset voltage Focus error offset balance crosstalk amount Focus error amp. V-V conversion gain Focus error amp. V-V conversion relative gain Focus error amp. balance output 1-H Focus error amp. balance output 1-L Focus error amp. balance relative output 2-H Focus error amp. balance relative output 2-L Focus error amp. frequency characteristics Focus error amp. GCTRL gain ratio x 4 Tracking error amp. Tracking error amp. output offset voltage Tracking error offset balance crosstalk amount Tracking error amp. V-V conversion gain Tracking error amp. V-V conversion relative gain Tracking error amp. balance output 1-H Tracking error amp. balance output 1-L VTR-OF VCC1 = 5 V, VCC2 = 3.3 V VTR-OFB VCC1 = 5 V, VCC2 = 3.3 V VTB = VREF2 0.5 V GTR GTR VCC1 = 5 V, VCC2 = 3.3 V VGC = VREF2 - 0.75 V VCC1 = 5 V, VCC2 = 3.3 V VGC = VREF2 - 0.75 V VFO-OF VCC1 = 5 V, VCC2 = 3.3 V VFO-OFB VCC1 = 5 V, VCC2 = 3.3 V VFB = VREF2 0.5 V GFO GFO VCC1 = 5 V, VCC2 = 3.3 V VGC = VREF2 - 0.75 V VCC1 = 5 V, VCC2 = 3.3 V VGC = VREF2 - 0.75 V ITOTAL1 VCC1 = 5 V, VCC2 = 3.3 V VEQCTL = VREF2 +0.75 V ITOTAL2 VCC1 = 5 V, VCC2 = 3.3 V VREF1 VREF2 VCC1 = 5 V, VCC2 = 3.3 V VCC1 = 5 V, VCC2 = 3.3 V
0 0 14.4 0 1.35 0.65 6.35
90 150 16.5 1.5 1.62 0.85 8.35
mV mV dB dB dB dB dB
BFO1-H VCC1 = 5 V, VCC2 = 3.3 V VFB = VREF2 +0.5 V BFO1-L VCC1 = 5 V, VCC2 = 3.3 V VFB = VREF2 - 0.5 V BFOH BFOL GFOF BFO4 VCC1 = 5 V, VCC2 = 3.3 V VFB = VREF2 +0.5 V VCC1 = 5 V, VCC2 = 3.3 V VFB = VREF2 - 0.5 V VCC1 = 5 V, VCC2 = 3.3 V f = 3 kHz, 60 kHz VCC1 = 5 V, VCC2 = 3.3 V VGC = VREF2
-8.35 -6.35 -4.35 -4.5 3.3 -3.0 4.3 -1.5 5.3
-60 -200 12.2 -1.5 0.45 1.08
0 0 14.3 0 0.65 1.35
60 200 16.4 1.5 0.85 1.62
mV mV dB dB
BTR1-H VCC1 = 5 V, VCC2 = 3.3 V VTB = VREF2 +0.5 V BTR1-L VCC1 = 5 V, VCC2 = 3.3 V VTB = VREF2 - 0.5 V
4
ICs for Compact Disc/CD-ROM Player
s Electrical Characteristics at Ta = 25C (continude)
Parameter Symbol Conditions 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 VCC1 = 5 V, VCC2 = 3.3 V VGC = VREF2 VCC1 = 5 V, VCC2 = 3.3 V VCC1 = 5 V, VCC2 = 3.3 V Min Typ
AN8847SB
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 Tracking error amp. GCTRL gain ratio x 4 RF addition amp. RF addition amp. output offset voltage RF addition amp. addition gain RF addition amp. addition relative gain 1 RF addition amp. addition relative gain 2 RF addition amp. addition relative gain 3 RF addition amp. full-addition gain RF addition amp. full-addition frequency characteristics * Variable EQ characteristics EQ characteristics x 1-1 * EQ characteristics x 1-3 * EQ characteristics x 32-1 * EQ characteristics x 32-3 * AGC AGC max. gain AGC operating gain AGC compression factor GMAGC f = 500 kHz, VIN = 20 mV[p-p] GAGC f = 500 kHz, VIN = 500 mV[p-p] GAGC f = 500 kHz, VIN = 100 mV[p-p] 20.0 3.0 -1.97 23.0 6.0 0.53 26.0 9.0 3.03 dB dB dB 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 2.5 -1.5 0.5 0 4.0 0 2.0 1.5 5.5 1.5 3.5 dB dB dB dB VRAOF GRAD -200 -1.5 -1.0 -1.0 -1.0 10.5 -2.88 0 0 0 0 0 12.0 0.12 200 1.5 1.0 1.0 1.0 13.5 3.12 mV dB dB dB dB dB dB BTRH BTRL GTRF BTR4 -8.35 -6.35 -4.35 4.35 -4.5 3.3 6.35 4.3 8.35 0 5.3 dB dB dB
GRAD1 VCC1 = 5 V, VCC2 = 3.3 V GRAD2 VCC1 = 5 V, VCC2 = 3.3 V GRAD3 VCC1 = 5 V, VCC2 = 3.3 V GRADA VCC1 = 5 V, VCC2 = 3.3 V
GRADDF VCC1 = 5 V, VCC2 = 3.3 V f = 500 kHz, 40 MHz
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
s Electrical Characteristics at Ta = 25C (continued)
Parameter NRF detection NRF det. detection level NRF det. high-level output voltage NRF det. low-level output voltage BDO CBDO detection current CBDO detection current ratio BDO high-level output voltage BDO low-level output voltage OFTR COFTR detection current COFTR detection current ratio IOFTR VCC1 = 5 V, VCC2 = 3.3 V VLDON = VREF2 - 0.5 V 1.07 3.1 4.2 0 1.49 3.9 1.91 4.7 0.8 1.2 A V V V IBDO BIBD4 VBDOH VBDOL VCC1 = 5 V, VCC2 = 3.3 V VEQCTL = VREF2 - 0.5 V VCC1 = 5 V, VCC2 = 3.3 V VEQCTL = VREF2 VCC1 = 5 V, VCC2 = 3.3 V f = 5 kHz, rectangular wave VCC1 = 5 V, VCC2 = 3.3 V f = 5 kHz, sine wave 1.07 4.4 4.2 1.49 5.4 1.91 6.4 0.8 A V V VRDA1 VRDAH VRDAL f = 500 kHz, VGC = VREF2 - 0.75 V f = 500 kHz, VGC = VREF2 - 0.75 V f = 500 kHz, VGC = VREF2 - 0.75 V 73 4.2 105 137 mV[p-p] 0.8 V V Symbol Conditions Min Typ Max Unit
BIOFTR4 VCC1 = 5 V, VCC2 = 3.3 V VLDON = VREF2
OFTR high-level output voltage VOFTRH VCC1 = 5 V, VCC2 = 3.3 V f = 5 kHz, rectangular wave OFTR low-level output voltage OFTR sensitivity 3TENV CEA to ENV transfer characteristics CEA input impedance ENV amp. output impedance ENV amp. offset voltage ENV amp. operation LD APC LD operating reference voltage LDON operating voltage Standby Current consumption at no load in a standby mode ISTBY VCC1 = 5 V, VCC2 = 3.3 V VLDON = VREF2 - 0.75 V VLD VLDON VCC1 = 5 V, VCC2 = 3.3 V VCC1 = 5 V, VCC2 = 3.3 V GCEA-ENV VCC1 = 5 V, VCC2 = 3.3 V ZCEA ZENV VENV VCC1 = 5 V, VCC2 = 3.3 V VCC1 = 5 V, VCC2 = 3.3 V VCC1 = 5 V, VCC2 = 3.3 V f = 800 kHz, AM modulation VOFTRL VCC1 = 5 V, VCC2 = 3.3 V f = 5 kHz, rectangular wave VOFT_S f = 470 kHz, sine wave VLDON = VREF2 +0.75 V
25.0 6.5 6.0 -120 210
28.0 8.5 8.0 0 420
31.0 10.5 10.0 120
dB k k mV
VENVOF VCC1 = 5 V, VCC2 = 3.3 V
630 mV[p-p]
139
170
201 - 0.35
mV V
3.61
5.16
6.71
mA
6
ICs for Compact Disc/CD-ROM Player
s Application Circuit Example
AN8847SB
15 COFTR 16 OFTR
27 FEOUT
13 CBDO 14 BDO
22 VREF2
20 VREF1
26 FEN
2 LD
BDO
VREF2 12 3TOUT
OFTR
Amp.
Standby
1 PD
19 LDON
VREF2 28 GCTRL 29 FBAL VREF2 24 TEN
Amp.
CEA 11
NRFDET 17 ARF 10
RF AGC
ENV detection
CAGC 9 VREF1 RFC 8 VREF2 7
EQ
RFDET AC
25 TEOUT TBAL
BCA
BCA
30
BCA BCA
GCA
GCA
EQCTL
23
GCA
VREF2 VCC2 VCC1 GND RVCC RGND
RFOUT 6
ADD amp. ADD amp.
GCA
21 18 3 5
VREF1 4
ADD amp.
Amp.
A 36
C 35
B 34
VREF1 D 33
F 32
A+C
VREF1
B+D
E
F
E 31
RFN
Amp.
7

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