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TDA7420 Datasheet(PDF) 1 Page - STMicroelectronics |
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TDA7420 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 29 page  TDA7420 MULTIFUNCTION AUDIO PROCESSOR CASSETTE PREAMPLIFIER: FORWARD/REVERSE INPUTS GROUND COMPATIBLE 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 DIFFER- ENTIAL, 1 STEREO AND 1 MONO INPUT GAIN FROM 0 TO 15dB (1dB STEP) VOLUME CONTROL FROM +16 TO -63dB (1dB STEP) BASS AND TREBLE CONTROL FROM -18 TO 18dB (1dB STEP) DIRECT MUTE, SOFT MUTE AND RADIO MUTE FOUR INDEPENDENT OUTPUT STAGES: - ATTENUATION CONTROL FROM 0 TO -79dB (1dB 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) 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 imple- mentation of several filter functions with switched capacitor techniques like fully integrated, adjust- ment free PLL Loop filter, pilot detector with inte- grator. This minimizes the number of external compo- nents. 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 1998 ® ORDERING NUMBER: TDA7420 TQFP 64 (14x14) 1/29 |
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