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2 / 17 page February 1991 2 Philips Semiconductors Product specification Multistandard IF amplifier and demodulator TDA8349A GENERAL DESCRIPTION The TDA8349A is a multistandard IF amplifier and demodulator with AGC and AFC functions for television receivers. The device has a video recognition circuit and a video switch for internal or external video for full SCART applications. FEATURES • Full-range gain-controlled wideband IF amplifier up to 60 MHz • Wide-band video amplifier with good linearity and a class AB output stage to ensure a very low output impedance • Supply independent video output level • Small second harmonic IF output • AGC circuit which operates on top sync level (negative modulation) or on white level (positive modulation) or on top level (MAC) with reduced sensitivity for high sound carriers • AFC circuit with an internal 90° phase shift circuit, a sample-and-hold circuit for negatively modulated signals to reduce video dependent AFC information and an analog or digital output • Video recognition possibility based on horizontal pulse duty cycles • Video switch for selection of internal or external video signals • Wide supply voltage range and ripple rejection • Requires few external components • Tuner AGC output for npn and pnp tuners QUICK REFERENCE DATA ORDERING AND PACKAGE INFORMATION Note 1. SOT146-1; 1996 November 29. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT V14-17 supply voltage (pin 14) 10.2 12 13.2 V I14 supply current (pin 14) Vi = 10 mV 40 55 65 mA V1-2(RMS) IF input sensitivity (RMS value) − 50 80 µV Gv IF gain control range 66 72 − dB V11-17(p-p) video output voltage (peak- to-peak value) 1.7 1.9 2.1 V S/N signal-to-noise ratio Vi =10mV 54 61 − dB V8-17(p-p) AFC output voltage swing (peak-to-peak value) 10 − 11 V EXTENDED TYPE NUMBER PACKAGE PINS PIN POSITION MATERIAL CODE TDA8349A 20 DIL plastic SOT146(1) |
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