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TDA7420 Datasheet

  • TDA7420

  • MULTIFUNCTIONAUDIO PROCESSOR

  • 230.02KB

  • 29頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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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)
TQFP 64 (14x14)
ORDERING NUMBER:
TDA7420
DESCRIPTION
The TDA7420 I
2
C 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
1/29

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