SAA7282ZP datasheet(2/25 Pages) PHILIPS

2 / 25 page

July 1993

Philips Semiconductors

Product speciﬁcation

Terrestrial Digital Sound Decoder (TDSD2)

SAA7282

FEATURES

• Full EBU NICAM 728 specification decoder

• Microcomputer controlled via I2C-bus

• Automatic decoding and output configuration depending

upon transmission:

– digital stereo

– digital mono and data

– 2 independent mono signals

• On board RAM for de-interleaving and 10 to 14-bit word

expansion

• Automatic mute function which silences the digital data

and switches to FM sound (if valid) when error rate

exceeds user definable limit

• User mute function (MUTE pin) to enable user to

perform muting to their own software algorithm if

required, or to simply silence the output

• 4 times over-sampling digital filter

• Selectable digital de-emphasis

• 256 times over-sampling Noise Shapers

• Fully integrated 1-bit DACs

• Integrated switching networks allowing selection

between NICAM Sound, FM Sound or external

“Daisy-Chain” input

• Digital Audio Interface conforming with EBU/IEC 958

• I2C-bus transceiver enabling a master device to read

– status information

– error count byte

– additional data bits

and write:

– switch control codes

– decoder control

– upper and lower error rate limits.

APPLICATIONS

• Television receivers

• Video cassette recorders.

GENERAL DESCRIPTION

Performing all digital decoding functions for a NICAM 728

digital stereo sound system, the SAA7282 is a highly

integrated CMOS circuit which only requires a DQPSK

(Differential Quadrature Phase Shift Keying) demodulator

(TDA8732) and minimum external components to achieve

a full NICAM solution.

The device may also be interfaced to other DQPSK

demodulators.

QUICK REFERENCE DATA

ORDERING INFORMATION

Note

1. SAA7282ZP: 32-DIL32SHR; plastic (SOT232A); SOT232-1; 1996 November 28.

2. SAA7282GP: 44-QFP; plastic (SOT205AG); SOT205-1; 1996 November 28.

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

VDD

positive supply voltage

4.5

5.0

5.5

IDD

supply current

−

100

fXTAL

crystal frequency

−

8.192

−

MHz

Tamb

operating ambient temperature

−

°C

EXTENDED TYPE

NUMBER

PACKAGE

PINS

PIN POSITION

MATERIAL

CODE

SAA7282ZP

DIL32SHR

plastic

SOT232A(1)

SAA7282GP

QFP

plastic

SOT205AG(2)

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