TA2153FN

2003-01-18

3

Pin Function

Pin No.

Symbol

I/O

Function Description

Remarks

1

¾

Power supply input terminal.

¾

2

RFGC

I

RF amplitude adjustment control signal input terminal.

Controlled by 3-PWM signals.

(PWM carrier

= 88.2 kHz)

3 signals input.

(2VRO, VRO, GND)

3

GMAD

I

Open loop gain adjustment terminal for AGC amp.

(Note1)

4

FNI

I

Main beam I-V amp input terminal.

Connected to pin diode

output B

+ D

(through resistor).

5

FPI

I

Main beam I-V amp input terminal.

Connected to pin diode

output A

+ C

(through resistor).

6

TPI

I

Sub beam I-V amp input terminal.

Connected to pin diode

output F.

7

TNI

I

Sub beam I-V amp input terminal.

Connected to pin diode

output E.

8

MDI

I

Monitor photo diode amp input terminal.

Connected to monitor photo

diode.

9

LDO

O

Laser diode amp input terminal.

Connected to laser diode

control circuit.

10

SEL

I

Laser diode control signal input terminal and APC circuit

ON/OFF control signal terminal.

SEL

Level

APC

Circuit

LDO

Detect

Frequency

GND

OFF

through resister (1 k

W)

Low

HiZ

ON

Control signal output

Low

ON

Control signal output

High

3 signals input.

11

TEB

I

Tracking error balance adjustment signal input terminal.

Controlled by 3-PWM signal.

(PWM carrier

= 88.2 kHz)

3 signals input.

(2VRO, VRO, GND)

12

2VRO

O

Reference voltage (2VRO) output terminal.

2VRO

¾

13

TEN

I

TE amp negative input terminal.

Connected to TEO through

feedback resistor.

14

TEO

O

TE error signal output terminal.

¾

15

SBAD

O

Sub beam adder signal output terminal.

¾

16

FEO

O

Focus error signal output terminal.

¾

17

FEN

I

FE amp negative input terminal.

Connected to FEO through

feedback resistor.

18

SEB

I

RFRP output circuit switching terminal.

SEB Level

Bottom

Detection

Peak

Detection

GND

ON

ON

OFF

ON

Low (GND) is for normal use.

19

VRO

O

Reference signal (VRO) output terminal.

VRO

¾

20

RFRP

O

Track count signal output terminal.

¾

21

BTC

I

Time constant adjustment terminal for bottom detection.

Adjusted by capacitance.