TDA3845 - NXP

TDA3845 Quasi split-sound circuit and AM demodulator

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-noi.

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.