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TDA9821 - Dual channel TV FM intercarrier sound demodulator

General Description

The TDA9821 is a monolithic, integrated, TV FM intercarrier sound demodulator for all FM standards.

The circuit contains two separate FM demodulators using Phase Locked Loop (PLL) reference frequency generation.

The circuit requires a minimum number of external components.

Key Features

  • Two alignment-free PLL FM demodulators.
  • Automatic second sound carrier mute.
  • Mono and dual channel.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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INTEGRATED CIRCUITS DATA SHEET TDA9821 Dual channel TV FM intercarrier sound demodulator Product specification Supersedes data of March 1991 File under Integrated Circuits, IC02 1996 Nov 20 Philips Semiconductors Product specification Dual channel TV FM intercarrier sound demodulator FEATURES • Two alignment-free PLL FM demodulators • Automatic second sound carrier mute • Mono and dual channel application • Low power consumption • Few external components required. QUICK REFERENCE DATA SYMBOL VP IP IM Vi(rms) Vo(rms) S+N ------------N α8/7 RR Tamb PARAMETER supply voltage (pin 14) supply current (pin 14) AC peak current (pins 7 and 8) input signal (RMS value) S+N ------------- = 40 dB N in accordance with “CCIR 468-3” f = 50 to 12500 Hz VRR < 200 mV; f = 70 Hz CONDITIONS MIN. 4.