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