TDA7420 Datasheet | STMicroelectronics

® MULTIFUNCTION AUDIO PROCESSOR CASSETTE PREAMPLIFIER: FORWARD/REVERSE INPUTS GROUND PATIBLE INTERNAL SWITCHES FOR EQUALIZATION INTERNAL ADJUSTMENT FOR TRAKING INTERNAL ADJUSTMENT FOR OUTPUT AMS: INPUT GAIN CONTROL ADJUSTABLE GAIN VERSUS FREQUENCY AUDIOPROCESSOR: INPUTS: 1 FULLY DIFFERENTIAL, 1 DIFFERENTIAL, 1 STEREO AND 1 MONO INPUT GAIN FROM 0 TO 15d B (1d B STEP) VOLUME CONTROL FROM +16 TO -63d B (1d B STEP) BASS AND TREBLE CONTROL FROM -18 TO 18d B (1d B STEP) DIRECT MUTE, SOFT MUTE AND RADIO MUTE FOUR INDEPENDENT OUTPUT STAGES: - ATTENUATION CONTROL FROM 0 TO -79d B (1d B STEP) - BEEP CONTROL (ON/OFF, FRONT/REAR) STEREO DECODER: ROLL-OFF ADJUSTMENT SELECTABLE DEEMPHASIS 19KHz CANCELLATION HIGH CUT CONTROL STEREO BLEND NOISE BLANKER AUTOMATIC THRESHOLD CONTROL AND PROGRAMMABLE TRIGGER THRESHOLD INTEGRATED HIGH PASS FILTER PACKAGE: TQFP64 (14x14) TQFP 64 (14x14) ORDERING NUMBER: TDA7420 DESCRIPTION The TDA7420 I 2C bus controlled multifunction audio processor contains all signal processing blocks of a high performance car radio, including audioprocessor, stereodecoder, noise blanker, different mute functions, cassette preamplifier and AMS function. The use of BICMOS technology allows the implementation of several filter functions with switched capacitor techniques like fully integrated, adjustment free PLL Loop filter, pilot detector with integrator. This minimizes the number of external ponents. Due to a highly linear signal processing, using CMOS-switching techniques instead of standard bipolar multipliers, very low distortion and very low noise are obtained also in the stereodecoder part. Very low DC stepping is obtained by use of the BICMOS technology. May...