TZA1045 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TZA1045

Photodiode and amplifier IC for CD and DVD applications

Philips Electronics 

Philips Semiconductors

Photodiode and amplifier IC for

CD and DVD applications

Preliminary specification

TZA1045

FEATURES

• High frequency RF amplifiers

(typical bandwidth = 240 MHz)

• Suitable for all CD (785 nm) and DVD (655 nm)

read/write applications

• Four high bandwidth central outputs (A, B, C, and D),

four satellite outputs (E, F, G, and H) and one high

bandwidth differential output (RFP, RFN)

• Internal current clamp and current fold back (power

reduction)

• Versatile programmable gain switches (CD/DVD, H/L,

and R/W)

• Single 5 V supply

• Current outputs for optimum signal transport over flex

cable

• Small outline package SSOP16T with good positional

tolerance.

APPLICATIONS

• CD and DVD read/write applications.

GENERAL DESCRIPTION

The TZA1045 is a single optical pick-up IC for read/write

systems and is suitable for CD and DVD applications.

The device contains eight RF amplifiers for the central and

satellite diodes and one differential RF amplifier (RFP

and RFN) which handles the sum of the four A, B, C, and D

central diode signals.

Programming the gain is a very versatile way to optimize

interfacing between the TZA1045 and the pre-amplifier.

The gain can be programmed for CD or DVD media with

the gain switch CD/DVD.

The H/L switch can be used for CD-R or CD-RW discs.

Gain switch R/W is used to reduce the gain during writing.

During writing, the high peak signals for the central and

satellite segments are clamped internally and the output

currents of the A, B, C, D, E, F, G, and H segments are

reduced to almost zero (fold back) to minimize the power

consumption.

All outputs are current outputs that can supply a maximum

of 8 mA. In CD-R writing mode, the clipping level of the

output currents is between 5 and 8 mA.

The SSOP16T package has a low spread on the

z tolerance. The z tolerance is measured between the

diodes (chip surface) and the bottom of the leads. The

diodes have an offset of 54 µm in the ‘y’ direction with

respect to the leadframe centre and a tolerance of ±50 µm

in both ‘x’ and ‘y’ directions.

The diodes are placed under an angle of 45° ±1° with

respect to the leadframe of the module.

ORDERING INFORMATION

TYPE

NUMBER

TZA1045TS

NAME

SSOP16T

PACKAGE

DESCRIPTION

plastic shrink small outline package/transparent;

16 leads (straight); body width 4.4 mm

VERSION

SOT734-1

2003 Jun 26

2

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