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ICs for Compact Disc/CD-ROM Player
AN8849SB
Head amplifier IC for CD-ROM drive (for 24 times speed or more)
s Overview
The AN8849SB is a head amplifier IC for digital servo. It can configure an efficient CD-ROM system in combination with the MN662752, 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, wide band RF amp. and AGC which meet CAV playback with 24 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 24 times speed or more CAV playback. * Wide band RF amp. and AGC (fC = 20 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
AN8849SB
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
LDON
28
ENV detection
GCTRL FBAL CROSS CCRS TEN TEOUT
CEA
11
29 21
Comp.
NRFDET ARF CAGC RFC
17 10
RF AGC RFDET AC
23 24 25
9 8
BCA
BCA
Amp.
30
BCA BCA
TBAL
GCA
EQSW RFOUT RFN
6 5
GCA
EQ
7
GCA GCA
VCC2 VCC1 GND
4 18
ADD amp.
Amp.
36
35
34
33
32
2
31
Amp.
3
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 RF addition amp. inverted input pin Power supply pin 1 RF addition amp. output pin EQ characteristics control pin Power supply pin 2 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 & masking control pin VREF1 output pin CROSS output pin VREF2 output pin Description
AN8849SB
Capacitor connection pin for CROSS TE amp. inverted input pin TE amp. output pin FE amp. inverted input pin FE amp. output pin GCTRL 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
s Absolute Maximum Ratings
Parameter Supply voltage 1 Supply voltage 2 Supply current 1 Supply current 2
*1 *1 *1 *1 *1, *2 *1
Symbol VCC1 VCC2 ICC1 ICC2 PD Topr Tstg
Rating 5.8 5.8 55 2.5 333.5 -20 to +75 -55 to +125
Unit V V 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: PD = VCC1 * ICC1 + VCC2 * ICC2
s Recommended Operating Range
Parameter Supply voltage 1 Supply voltage 2
Note) Apply voltage to satisfy V CC2 - VCC1 < 0.3 V.
Symbol VCC1 VCC2
Range 4.5 to 5.5 3.0 to 5.5
Unit V V
3
AN8849SB
s Electrical Characteristics at Ta = 25C
Parameter 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 Symbol
ICs for Compact Disc/CD-ROM Player
Conditions
Min 28.4 1.20 2.27 1.50 -90 -150 12.3 -1.5 1.08 0.45 4.35
Typ 40.6 1.72 2.50 1.65
Max 52.8 2.24 2.73 1.80
Unit mA mA V V
ITOTAL1 VCC1 = 5 V, VCC2 = 3.3 V VEQSW = 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
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
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
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
-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, f = 10 kHz VCC1 = 5 V, VCC2 = 3.3 V, f = 10 kHz VCC1 = 5 V, VCC2 = 3.3 V VCC1 = 5 V, VCC2 = 3.3 V Min Typ
AN8849SB
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 CROSS detection CROSS high-level output CROSS low-level output 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 20-1 * EQ characteristics x 20-3 * AGC AGC max. gain AGC operating gain AGC compression factor AGC frequency characteristics GMAGC f = 500 kHz, VIN = 20 mV[p-p] GAGC f = 500 kHz, VIN = 500 mV[p-p] f = 30 MHz, VIN = 20 mV[p-p] GAGC f = 500 kHz, VIN = 125 mV[p-p] GFAGC 20.3 3.0 -1.20 -4.5 23.3 6.0 1.30 -3.0 26.3 9.0 3.80 0 dB dB dB dB GEQ1-1 f = 100 kHz EQSW = VREF2 - 0.5 V GEQ1-3 f = 500 kHz EQSW = VREF2 - 0.5 V GEQ20-1 EQSW = VREF2 +0.5 V f = 2 MHz GEQ20-3 EQSW = VREF2 +0.5 V f = 13 MHz -1.5 0.5 -1.5 -1.3 0 2.0 0 0.2 1.5 3.5 1.5 1.7 dB dB dB dB VRAOF GRAD -200 -2.1 -1.0 -1.0 -1.0 9.9 -3.1 0 0 0 0 0 12.0 -1.6 200 2.1 1.0 1.0 1.0 14.1 1.4 mV dB dB dB dB dB dB VCR-H VCR-L 4.2 0.8 V V 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, 30 MHz
Note) *: The values mentioned above are subject to change according to the state of a printed circuit board, a socket, etc.
5
AN8849SB
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 NRF det. detection level ratio 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 EQSW = VREF2 - 0.5 V 0.98 3.0 4.2 0.65 1.40 3.8 1.82 4.6 0.8 0.35 A V V V V IBDO BIBD4 VBDOH VBDOL VCC1 = 5 V, VCC2 = 3.3 V EQSW = VREF2 - 0.5 V VCC1 = 5 V, VCC2 = 3.3 V EQSW = VREF2 VCC1 = 5 V, VCC2 = 3.3 V f = 5 kHz, rectangular wave VCC1 = 5 V, VCC2 = 3.3 V f = 5 kHz, rectangular wave 0.98 3.0 4.2 1.40 3.8 1.82 4.6 0.8 A V V VRDA1 VRDAH VRDAL BRDA f = 500 kHz, VGC = VREF2 - 0.75 V f = 500 kHz, VGC = VREF2 - 0.75 V f = 500 kHz, VGC = VREF2 - 0.75 V f = 500 kHz, VGC = VREF2 73 4.2 2.9 105 3.9 137 mV[p-p] 0.8 4.9 V V Symbol Conditions Min Typ Max Unit
BIOFTR4 VCC1 = 5 V, VCC2 = 3.3 V EQSW = VREF2
OFTR high-level output voltage VOFTRH VCC1 = 5 V, VCC2 = 3.3 V f = 5 kHz, rectangular wave OFTR low-level output voltage Masking operating voltage 1 Masking operating voltage 2 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 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 VMASK1 f = 40 kHz, VIN = 100 mV[p-p] VMASK2 f = 40 kHz, VIN = 100 mV[p-p]
20.0 6.8 6.4 -100 270
23.0 8.8 8.4 0 540
26.0 10.8 10.4 100
dB k k mV
VENVOF VCC1 = 5 V, VCC2 = 3.3 V
810 mV[p-p]
135
170
205 - 0.35
mV V
6
ICs for Compact Disc/CD-ROM Player
s Application Circuit Example
AN8849SB
15 COFTR 16 OFTR 26 FEN
27 FEOUT
13 CBDO 14 BDO
22 VREF2
20 VREF1
2 LD
BDO
VREF2 12 3TOUT
OFTR
Amp.
1 PD 19 LDON VREF2 28 GCTRL 29 FBAL VREF2 21 CROSS Comp. 23 CCRS 24 TEN VREF2 25 TEOUT 30 TBAL
CEA 11
NRFDET 17 ARF 10 RF AGC Amp.
BCA BCA BCA GCA GCA BCA
ENV detection
CAGC 9 VREF1 RFC 8 VREF2 6 EQ EQSW
RFDET AC
7
GCA
VREF2
RFOUT 5 ADD amp.
ADD amp. ADD amp.
GCA
VREF1 3 RFN
4 18
VCC1 GND
Amp.
A 36
C 35
B 34
D 33
F 32
VREF1
B+D
A+C
VREF1
E
F
E 31
Amp.
7

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