ICs for Compact Disc/CD-ROM Player AN8849SB Head amplifier IC for CD-ROM drive (for 24 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 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. 11.93±0.3 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. SSOP036-P-0450A ■ Applications • CD/CD-ROM drive 1 AN8849SB ICs for Compact Disc/CD-ROM Player 12 PD 1 2 Amp. 20 LD VREF1 15 COFTR 16 OFTR 26 FEN 27 FEOUT 22 VREF2 OFTR 3TOUT BDO 13 CBDO 14 BDO ■ Block Diagram 19 28 2 ENV detection Comp. FBAL CROSS CCRS Amp. GCA Amp. 31 GCA Amp. 32 33 3 ADD amp. 5 TEN TEOUT TBAL BCA BCA GCA 25 30 BCA BCA GCA 24 7 36 RFN 6 34 RFOUT 8 ADD amp. EQSW 9 35 RFC 23 GCTRL 10 RFDET AC CAGC 17 RF AGC ARF 21 EQ NRFDET 11 ADD amp. CEA 29 LDON 4 18 VCC2 VCC1 GND ICs for Compact Disc/CD-ROM Player AN8849SB ■ Pin Descriptions Pin No. Description Pin No. Description 1 APC amp. input pin 18 GND pin 2 APC amp. output pin 19 APC & masking control pin 3 RF addition amp. inverted input pin 20 VREF1 output pin 4 Power supply pin 1 21 CROSS output pin 5 RF addition amp. output pin 22 VREF2 output pin 6 EQ characteristics control pin 23 Capacitor connection pin for CROSS 7 Power supply pin 2 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 GCTRL 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 1 *1 VCC1 5.8 V Supply voltage 2 *1 VCC2 5.8 V Supply current 1 *1 ICC1 55 mA Supply current 2 *1 ICC2 2.5 mA PD 333.5 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: PD = VCC1 · ICC1 + VCC2 · ICC2 ■ Recommended Operating Range Parameter Symbol Range Unit Supply voltage 1 VCC1 4.5 to 5.5 V Supply voltage 2 VCC2 3.0 to 5.5 V Note) Apply voltage to satisfy V CC2 − VCC1 < 0.3 V. 3 AN8849SB 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 1 ITOTAL1 VCC1 = 5 V, VCC2 = 3.3 V VEQSW = VREF2 +0.75 V 28.4 40.6 52.8 mA Current consumption with no load 2 ITOTAL2 VCC1 = 5 V, VCC2 = 3.3 V 1.20 1.72 2.24 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 AN8849SB ■ 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 CROSS high-level output VCR-H VCC1 = 5 V, VCC2 = 3.3 V, f = 10 kHz 4.2 V CROSS low-level output VCR-L VCC1 = 5 V, VCC2 = 3.3 V, f = 10 kHz 0.8 V 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 −2.1 0 2.1 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 9.9 12.0 14.1 dB RF addition amp. full-addition frequency characteristics * GRADDF VCC1 = 5 V, VCC2 = 3.3 V f = 500 kHz, 30 MHz −3.1 −1.6 1.4 dB EQ characteristics × 1−1 * GEQ1−1 f = 100 kHz EQSW = VREF2 − 0.5 V −1.5 0 1.5 dB EQ characteristics × 1−3 * GEQ1−3 f = 500 kHz EQSW = VREF2 − 0.5 V 0.5 2.0 3.5 dB EQ characteristics × 20−1 * GEQ20−1 EQSW = VREF2 +0.5 V f = 2 MHz −1.5 0 1.5 dB EQ characteristics × 20−3 * GEQ20−3 EQSW = VREF2 +0.5 V f = 13 MHz −1.3 0.2 1.7 dB GMAGC f = 500 kHz, VIN = 20 mV[p-p] 20.3 23.3 26.3 dB 3.0 6.0 9.0 dB −1.20 1.30 3.80 dB −4.5 −3.0 0 dB CROSS detection RF addition amp. Variable EQ characteristics AGC AGC max. gain AGC operating gain GAGC f = 500 kHz, VIN = 500 mV[p-p] AGC compression factor ∆GAGC f = 500 kHz, VIN = 125 mV[p-p] AGC frequency characteristics GFAGC f = 30 MHz, VIN = 20 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 AN8849SB 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 NRF det. detection level ratio BRDA f = 500 kHz, VGC = VREF2 2.9 3.9 4.9 CBDO detection current IBDO VCC1 = 5 V, VCC2 = 3.3 V EQSW = VREF2 − 0.5 V 0.98 1.40 1.82 µA CBDO detection current ratio BIBD4 VCC1 = 5 V, VCC2 = 3.3 V EQSW = VREF2 3.0 3.8 4.6 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, rectangular wave 0.8 V IOFTR VCC1 = 5 V, VCC2 = 3.3 V EQSW = VREF2 − 0.5 V 0.98 1.40 1.82 µA BIOFTR4 VCC1 = 5 V, VCC2 = 3.3 V EQSW = VREF2 3.0 3.8 4.6 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 Masking operating voltage 1 VMASK1 f = 40 kHz, VIN = 100 mV[p-p] 0.35 V Masking operating voltage 2 VMASK2 f = 40 kHz, VIN = 100 mV[p-p] 0.65 V GCEA−ENV VCC1 = 5 V, VCC2 = 3.3 V 20.0 23.0 26.0 dB BDO 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 6.8 8.8 10.8 kΩ ENV amp. output impedance ZENV VCC1 = 5 V, VCC2 = 3.3 V 6.4 8.4 10.4 kΩ 100 mV ENV amp. offset voltage ENV amp. operation VENVOF VCC1 = 5 V, VCC2 = 3.3 V −100 0 VENV VCC1 = 5 V, VCC2 = 3.3 V f = 800 kHz, AM modulation 270 540 810 mV[p-p] VLD VCC1 = 5 V, VCC2 = 3.3 V 135 170 205 mV VLDON VCC1 = 5 V, VCC2 = 3.3 V − 0.35 V LD APC LD operating reference voltage LDON operating voltage 6 ICs for Compact Disc/CD-ROM Player AN8849SB 12 3TOUT 1 PD 2 LD 20 VREF1 22 VREF2 27 FEOUT Amp. OFTR BDO VREF2 15 COFTR 16 OFTR 26 FEN 13 CBDO 14 BDO ■ Application Circuit Example 19 LDON VREF2 28 GCTRL 29 FBAL ENV detection CEA 11 VREF2 21 CROSS Comp. NRFDET 17 VREF1 RFC 8 25 BCA BCA GCA 30 TBAL BCA BCA GCA EQ 6 3 GCA Amp. ADD amp. ADD amp. ADD amp. RFOUT 5 Amp. GCA 7 VREF1 VREF2 TEOUT VREF2 EQSW 23 CCRS 24 TEN Amp. CAGC 9 RFDET AC RF AGC ARF 10 4 18 VREF2 VCC1 GND E 31 F 32 D 33 E F VREF1 C 35 B 34 B+D A+C VREF1 A 36 RFN 7