Panasonic AN8837SB Datasheet

ICs for Compact Disc/CD-ROM Player

AN8837SB

Low power consumption CD-DA head amplifier IC for 3-beam system
optical pick-up

Unit: mm

■ Overview

The AN8837SB is a head amplifier IC for digital
servo. It can configure an efficient CD system in combi­nation with the MN6627XX series, and allows a full­automatic adjustment of tracking balance-gain-offset and
focus balance-gain-offset with fewer external parts.

■ 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.

■ Applications

• CD player

1

(0.45)

14 15

0.1±0.1

0.3

7.2±0.3

9.3±0.3

SSOP028-P-0375

28

0.3±0.1

11.6±0.3

0.8

0.15

0.9

2.0±0.2

1

AN8837SB ICs for Compact Disc/CD-ROM Player

■ Block Diagram

REF

CC

FEOUT

ENV

CEA

OFTR

CSBRT

BDO

19

11

17

10

12

ENVOFF

20

3TENV

OFTR

detection

FEN

25

24

V

V

3

26

14

Band

GND

gap

LDON

13

7

6
18

21
23

LD

LPD
VDET

TEBPF
TEOUT

RFDET

RFIN

RF

15

9
8

RF

detection

BDO

detection

4

Sub-

A-ch.

A

PDA

traction

VCBA

5

B-ch.

B

PDB

1

E

PDE

Sub-

E-ch.

traction

F-ch.

VCBA

F

2

PDF

22

16

28
27

TEN

CROSS

FBAL
TBAL

2

ICs for Compact Disc/CD-ROM Player AN8837SB

■ Pin Descriptions

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

Pin No. Description

15 NRFDET output pin
16 CROSS output pin
17 OFTR output pin
18 VDET output pin
19 3TENV 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

output pin

REF

27 TBAL control pin
28 FBAL control pin

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V
Supply current I
Power dissipation P
Operating ambient temperature
Storage temperature

Note)*: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.

*

*

CC

CC

D

T

opr

T

stg

5.8 V
20 mA

116 mW

−20 to +75 °C

−55 to +125 °C

■ Recommended Operating Range

Parameter Symbol Range Unit

Supply voltage V

CC

2.7 to 5.5 V

3