TDA8808T Просмотр технического описания (PDF) - Philips Electronics

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TDA8808T

Photo diode signal processor for compact disc players

Philips Electronics 

Philips Semiconductors

Photo diode signal processor for

compact disc players

Product specification

TDA8808T

TDA8808AT

GENERAL DESCRIPTION

The TDA8808 is a bipolar integrated circuit designed for use in compact disc players with a single spot read-out system.

It amplifies the photo-diode signals and processes the error signals for the focus- and radial control network.

Features

• Data amplifier with equalizer and AGC

• Offset-free pre-amplifier with AGC for the servo signals

• Trackloss and drop-out detection

• Start-up procedure for focus

• Normalizing focus error output signal to minimize radial error interference

• Laser supply amplifier and reference source

• Both TDA8808T and TDA8808AT versions suitable for car, portable and home applications

• Single and dual supply application

• Focus in-lock signal; ready signal output (RD).

QUICK REFERENCE DATA

SYMBOL

PARAMETER

VP

Vext

Vext

IQ

IHFin(p-p)

ID

ILO

Tamb

Supply

Supply voltage range

External voltage range

TDA8808T

TDA8808AT

Quiescent supply current

HF input current

(peak-to-peak value)

LF input current

(for each diode input)

Laser supply output current

Operating ambient

temperature range

CONDITIONS

MIN.

TYP. MAX. UNIT

4,5

5,0

5,5

V

Si/RD = 0 V

−5,5

−5,0

0

V

VP

10

12

V

7,5

10

12,5

mA

fHFin = 100 kHz

3

−

10

µA

0

−

6

µA

Si/R7D = HIGH Z −8

−4

−2

mA

−30

−

+85

°C

PACKAGE OUTLINE

28-lead mini-pack; plastic (SO28; SOT136A); SOT136-1; 1996 August 13.

November 1987

2

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