AN8837SB PANASONIC | Alldatasheet

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ICs for Compact Disc/CD-ROM Player AN8837SB Low power consumption CD-DA head amplifier IC for 3-beam system optical pick-up n Overview The AN8837SB is a head amplifier IC for digital servo. It can configure an efficient CD system in combi- nation with the MN6627XX series, and allows a full- automatic adjustment of tracking balance-gain-offset and focus balance-gain-offset with fewer external parts. n Features

  • Operating supply voltage VCC = 2.7 V to 5.5 V
  • Balance adjustment function built-in Focus error amp./tracking error amp.
  • OFTR/BDO detection
  • CROSS detection and vibration detection
  • APC amp. n Applications
  • CD player SSOP028-P-0375 Unit: mm (0.45) 0.3±0.1 11.6±0.3 2.0±0.2 0.9 0.1±0.1 0.15 0.8 9.3±0.3 7.2±0.3 0.3 14 15

AN8837SB ICs for Compact Disc/CD-ROM Player n Block Diagram F PDF TBAL CROSS TEN

28 FBAL

F-ch. VCBA E 1PDE E-ch. B 5PDB B-ch. Band gap

23 TEOUT

18 VDET

21 TEBPF

A-ch. VCBA8RF 9RFIN 15RFDET 12BDO 17OFTR 10CSBRT 19ENV 11CEA 3TENV A 4PDA

6 LPD

13 LDON

14 GND

26 V REF

20 ENVOFF

ICs for Compact Disc/CD-ROM Player AN8837SB Pin No. Description

15 NRFDET output pin

16 CROSS output pin

17 OFTR output pin

18 VDET output pin

20 ENV control pin

21 VDET input pin

22 TE amp. input pin 23 TE amp. output pin 24 FE amp. outtput pin 25 FE amp. intput pin

26 V REF output pin

27 TBAL control pin

28 FBAL control pin

Pin No. Description

1 Tracking signal input pin 1

2 Tracking signal input pin 2

3 Power supply pin

4 Focus signal input pin 1

5 Focus signal input pin 2

6 APC amp. input pin 7 APC amp. output pin

8 RF adding output pin

9 Input pin for the detection circuits

10 Capacitor connection pin for OFTR

11 Capacitor connection pin for HPF amp.

12 BDO output pin

13 APC control pin

14 GND pin

Parameter Symbol Range Unit Supply voltage V CC 2.7 to 5.5 V n Recommended Operating Range Parameter Symbol Rating Unit Supply voltage V CC 5.8 V Supply current I CC 20 mA Power dissipation P D 116 mW Operating ambient temperature * Topr -20 to +75 °C Storage temperature * T stg -55 to +125 °C n Absolute Maximum Ratings Note) *: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.

AN8837SB ICs for Compact Disc/CD-ROM Player n Electrical Characteristics at Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Current consumption with no loadITOT V CC = 3 V 3.8 5.8 7.8 mA V REF output pin V REF V CC = 3 V 1.37 1.50 1.63 V Focus error amplification Focus error amp. V FO-OF V CC = 3 V -100 0 100 mV output offset voltage Focus error offset balance V FO-OFB V CC = 3 V -120 0 120 mV crosstalk amount V FB = VREF –0.375V Focus error amp. G FO1 V CC = 3 V 9.6 12.2 14.7 dB V-V conversion gain V FB = VREF Focus error amp. DG FO2 V CC = 3 V -1.5 0 1.5 dB V-V conversion relative gain V FB = VREF Focus balance B FO1-H V CC = 3 V 1.21 1.31 1.41 ¾ variable range 1-HV FB = VREF +0.375V Focus balance B FO1-L V CC = 3 V 0.48 0.69 0.9 ¾ variable range 1-LV FB = VREF - 0.375V Focus balance B FO2-H V CC = 3 V 0.48 0.69 0.9 ¾ variable range 2-HV FB = VREF +0.375V Focus balance B FO2-L V CC = 3 V 1.21 1.31 1.41 ¾ variable range 2-LV FB = VREF - 0.375V Focus error amp. G FOF V CC = 3 V -4.7 -3.2 -1.7 dB frequency characteristics f = 3 kHz, 50 kHz Tracking error amplification Tracking error amp. V TR-OF V CC = 3 V -97 0 97 mV output offset voltage Tracking error offset balance VTR-OFB V CC = 3 V -120 0 120 mV crosstalk amount V TB = VREF –0.375V Tracking error amp. R TR1 V CC = 3 V 570 740 910 k W I-V conversion gain V TB = VREF Tracking error amp. DR TR2 V CC = 3 V -18 0 18 % I-V conversion relative gain V TB = VREF Tracking balance B TR1-H V CC = 3 V 0.47 0.68 0.89 ¾ variable range 1-HV TB = VREF +0.375V Tracking balance B TR1-L V CC = 3 V 1.22 1.33 1.44 ¾ variable range 1-LV TB = VREF - 0.375V Tracking balance B TR2-H V CC = 3 V 1.22 1.33 1.44 ¾ variable range 2-HV TB = VREF +0.375V Tracking balance B TR2-L V CC = 3 V 0.47 0.68 0.89 ¾ variable range 2-LV TB = VREF - 0.375V Tracking error amp. G TR1 V CC = 3 V -5.0 -3.5 -2.0 dB frequency characteristics f = 5 kHz, 100 kHz TEMUTE operation V 23M V CC = 3 V -75 0 75 mV

ICs for Compact Disc/CD-ROM Player AN8837SB n Electrical Characteristics at Ta = 25°C (continude) Parameter Symbol Conditions Min Typ Max Unit CROSS detection CROSS high-level output V CR-H V CC = 3 V, VTB = VREF , f = 10 kHz 2.6 ¾¾ V CROSS low-level output V CR-L V CC = 3 V, VTB = VREF , f = 10 kHz ¾¾ 0.4 V CROSS comparator DV HiS1 V CC = 3 V 3 55 06 5m V hysteresis 1 CROSS comparator DV HiS2 V CC = 3 V -57 -42 -27 mV hysteresis 2 RF amplification RF amp. offset voltage V RF-OF V CC = 3 V -910 -710 -510 mV RF amp. transfer gain G RF V CC = 3 V 7.7 9.3 10.9 dB RF amp. relative transfer gainDG RF V CC = 3 V - 0.8 0 0.8 dB RF amp. G RFF V CC = 3 V -3.7 -1.5 0.7 dB frequency characteristics * f = 500 kHz, 3 MHz RF amp. relative DG RFF V CC = 3 V -1.0 0 1.0 dB frequency characteristics * f = 500 kHz, 3 MHz RF amp. G EQ1 V CC = 3 V 0.5 1.7 3.6 dB EQ characteristics 1 * f = 500 kHz, 1.5 MHz RF amp. G EQ2 V CC = 3 V -3.5 -2.0 - 0.5 dB EQ characteristics 2 * f = 100 kHz, 500 kHz RF detection RFDET detection operation V NRF V CC = 3 V, f = 500 kHz 88 132 176 mV[p-p] RFDET high-level V NRF-H V CC = 3 V, f = 500 kHz 2.6 ¾¾ V RFDET low-level V NRF-L V CC = 3 V, f = 500 kHz ¾¾ 0.4 V BDO BDO detection level V BDO V CC = 3 V -70 -44 -18 mV BDO high-level V BDO-H f = 5 kHz, 170 mV[p-p], V CC = 3 V 2.6 ¾¾ V BDO low-level V BDO-L f = 5 kHz, 170 mV[p-p], V CC = 3 V ¾¾ 0.4 V OFTR OFTR detection current G FAGC1 V CC = 3 V 1.03 1.45 1.87 mA OFTR high-level V OFT-H V CC = 3 V, f = 5 kHz, 700 mV[p-p] 2.6 ¾¾ V OFTR low-level V OFT-L V CC = 3 V, f = 5 kHz, 700 mV[p-p] ¾¾ 0.4 V LD APC APC operating voltage V APC V CC = 3 V 147 170 193 mV Note) *: The values mentioned above are subject to change according to the state of a printed circuit board, a socket, etc.

AN8837SB ICs for Compact Disc/CD-ROM Player n Electrical Characteristics at Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit VDET VDET detection level 1 V DET1 V CC = 3 V 3 85 16 4m V VDET detection level 2 V DET2 V CC = 3 V -64 -51 -38 mV VDET high-level V DET-H V CC = 3 V 2.6 ¾¾ V VDET low-level V DET-L V CC = 3 V ¾¾ 0.4 V TEBPF input impedance Z TEB V CC = 3 V 140 200 260 k W 3TENV ENV amp. offset voltage V ENV-OF V CC = 3 V -75 0 75 mV CEA-ENV G CENV V CC = 3 V 6 7.6 9.2 times transfer characteristics CEA input impedance Z CEA V CC = 3 V 6.8 8.7 10.6 k W ENV output impedance Z ENV V CC = 3 V 6.2 8.0 9.8 k W ENV amp. operation V OP-ENV V CC = 3 V, f = 800 kHz 70 110 150 mV[p-p] AM modulation ENV amp. no-operation V ENV-OFF V CC = 3 V, f = 800 kHz -15 0 15 mV[p-p] AM modulation RF amplification RF-amp. output impedance Z RFOS V CC = 3 V ¾¾ 29 W

ICs for Compact Disc/CD-ROM Player AN8837SB n Application Circuit Example F F-ch. VCBA E E-ch. B B-ch. Band gap A-ch. VCBA8 3TENV A Sub- traction Sub- traction RF detection BDO detection OFTR detection PDF PDE PDB PDA C C B E E D A D FF TBAL CROSS TEN FBAL TEOUT VDET V CC PD LD TEBPF LPD LD LDON GND V REF V CC ENVOFF FEOUT FEN V CC RF RFIN RFDET BDO OFTR CSBRT ENV CEA V CC ENV