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TDA2555

Dual TV sound demodulator circuits

Philips Electronics 

Philips Semiconductors

Dual TV sound demodulator circuits

Product specification

TDA2555

TDA2557

GENERAL DESCRIPTION

The circuits incorporate two FM demodulator systems to perform the demodulator functions required in a dual sound

carrier TV system for demodulating the sound carriers.

The difference between TDA2555 and TDA2557 is the number of stages of the limiting amplifier.

• Eight (TDA2555) or five (TDA2557) stage limiting amplifier

• Quadrature demodulator for FM detection

• De-emphasis stage

• Output amplifier

• Mute function for each FM demodulator

QUICK REFERENCE DATA

Supply voltage (pins 13 and 15)

Supply current (pins 13 and 15)

AF output voltage (pins 2 and 8)

Total harmonic distortion (note 1)

Signal to weighted noise ratio

VP

typ.

IP

typ.

Vo(rms)

typ.

THD

<

(S + N)/N

typ.

12

V

24,5

mA

600

mV

0,1

%

70

dB

PACKAGE OUTLINE

18-lead DIL; plastic (SOT102); SOT102-1; 1996 November 19.

March 1986

2

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