SAA7282GP データシートの表示（PDF） - Philips Electronics

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SAA7282GP

Terrestrial Digital Sound Decoder (TDSD2)

Philips Electronics 

Philips Semiconductors

Terrestrial Digital Sound Decoder (TDSD2)

Product specification

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

SYMBOL

VDD

IDD

fXTAL

Tamb

PARAMETER

positive supply voltage

supply current

crystal frequency

operating ambient temperature

MIN.

4.5

−

−

0

TYP.

5.0

50

8.192

−

MAX.

5.5

100

−

70

UNIT

V

mA

MHz

°C

ORDERING INFORMATION

EXTENDED TYPE

NUMBER

SAA7282ZP

SAA7282GP

PINS

32

44

PIN POSITION

DIL32SHR

QFP

PACKAGE

MATERIAL

plastic

plastic

Note

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

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

July 1993

2

CODE

SOT232A(1)

SOT205AG(2)

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