TDA4445A

TDA4445B

SOUND IF AMPLIFIER

December 1992

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IF INPUT

NOT TO BE CONNECTED

IF AGC TIME CONSTANT

NOT TO BE CONNECTED

REFERENCE L.C. NETWORK

REFERENCE L.C. NETWORK

NOT TO BE CONNECTED

SUPPLY VOLTAGE

FM MODULATED SOUND OUTPUT

GROUND

IF INPUT

NOT TO BE CONNECTED

NOT TO BE CONNECTED

NOT TO BE CONNECTED

NOT TO BE CONNE CTED FOR TDA4445A

AVE RAGING CAP ACITOR FOR TDA4445B

NOT TO BE CONNE CTED FOR TDA4445A

A.F. SOUND OUTPU T FOR TDA4445B

PIN CONNECTIONS

DIP16

(Plastic Package)

ORDER CODE : TDA4445A - TDA4445B

.

QUADRATURE INTERCARRIER DEMODU-

LATOR

.

VERY HIGH INPUT SENSITIVITY

.

GOOD SIGNAL TO NOISE RATIO

.

FAST AVERAGING AGC

.

IF AMPLIFIER CAN BE SWITCHED OFF FOR

VTR MODE

.

GOOD AM SUPPRESSION

.

OUTPUT

SIGNAL

STABILIZED

AGAINST

SUPPLY VOLTAGE VARIATIONS

.

VERY FEW EXTERNAL COMPONENTS

DESCRIPTION

TDA4445A :

Sound IF amplifier, with FM processing for quasi

parallel sound system.

TDA4445B :

Sound IF amplifier, with FM processing and AM

demodulator, for multi-standard sound TV appli-

ances.

TDA4445B additionnal :

Bistandard applications (B/G and L)

No adjustment of the AM demodulator

Low AM distortion

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