TDA3845

INTEGRATED CIRCUITS DATA SHEET TDA3845; TDA3845T Quasi split-sound circuit and AM demodulator Objective specification File under Integrated Circuits, IC02 January 1993 Philips Semiconductors Objective specification Quasi split-sound circuit and AM demodulator FEATURES Power supply from 5 V (200 mW) to 8 V source also an alternative 12 V source (12 V not for TDA3845T) Gain controlled wideband IF amplifier (AC coupled with three stages) High precision internal 90° phase shifter for quadrature demodulator Amplitude detector for gain control which operates as a peak detector for FM sound and as a mean level detector for AM sound (switchable) In-phase wideband synchronous demodulator for AM detection TDA3845; TDA3845T Stabilizer circuit for ripple rejection and constant output signals ESD protection for all pins Suitable for all FM standards and L as well as L-accent standard NICAM compatible. GENERAL DESCRIPTION The TDA3845 is a quasi split-sound IF circuit which is designed to provide high performance television FM/AM sound. QUICK REFERENCE DATA SYMBOL VP1 VP2 IP V1-16(RMS) V12-13(RMS) (S +W)/W pin 14 pin 11 (not for TDA3845T) supply current minimum IF input voltage (RMS value) IF control range intercarrier output voltage 5.5 MHz (RMS value) signal-to-weighted-noise ratio (relative to 1 kHz; 50 kHz deviation) at 5.5 MHz for 2T/20T at 5.742 MHz for 2T/20T V6-13(RMS) (S +W)/W THD Tamb AF output voltage AM (RMS value) signal-to-weighted-noise ratio; AM mode t...