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SAA7325

Digital servo processor and Compact Disc decoder with integrated DAC (CD10)

Philips Electronics 

Philips Semiconductors

Digital servo processor and Compact Disc

decoder with integrated DAC (CD10)

Product specification

SAA7325

1 FEATURES

• Single speed operation

• Integrated bitstream DAC with differential outputs,

operating at 96fs with 3rd-order noise shaper; typical

performance of −90 dB signal-to-noise ratio

• Separate serial input and output interfaces allow data

‘loopback’ mode for use of onboard DAC with external

Electronic Shock Absorption (ESA) systems

• Lock-to-disc mode

• Full error correction strategy, t = 2 and e = 4

• Full CD graphics interface

• All standard decoder functions implemented digitally on

chip

• FIFO overflow concealment for rotational shock

resistance

• Digital audio interface (EBU), audio and data

• 2 and 4 times oversampling integrated digital filter,

including fs mode

• Audio data peak level detection

• Kill interface for external DAC deactivation during digital

silence

• All SAA737x (CD7) digital servo and high-level functions

• Low focus noise

• Same playability performance as SAA737x (CD7)

• Automatic closed-loop gain control available for focus

and radial loops

• Pulsed sledge support

• Electronic damping of fast radial actuator during long

jump

• Microcontroller loading LOW

• High-level servo control option

• High-level mechanism monitor

• Communication may be via I2C-bus or

TDA1301/SAA7345 compatible bus

• On-chip clock multiplier allows the use of 8.4672,

16.9344 or 33.8688 MHz crystals or ceramic

resonators.

2 GENERAL DESCRIPTION

The SAA7325 (CD10) is a single chip combining the

functions of a CD decoder, digital servo and bitstream

DAC. The decoder/servo part is based on the SAA737x

(CD7) and is software compatible with this design. Extra

functions are controlled by use of ‘shadow’ registers

(see Section 7.15.3).

Supply of this Compact Disc IC does not convey an implied

license under any patent right to use this IC in any

Compact Disc application.

3 ORDERING INFORMATION

TYPE

NUMBER

SAA7325H

NAME

QFP64

PACKAGE

DESCRIPTION

plastic quad flat package; 64 leads (lead length 1.6 mm);

body 14 × 14 × 2.7 mm

VERSION

SOT393-1

1999 Jun 17

3

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