DEVICE INCLUDES AUDIO PROCESSOR,
STEREO DECODER AND NOISEBLANKER
HIGH PERFORMANCE SIGNAL PROCES-
SOR WITH BASIC FUNCTIONS
AM, FM, MPX AND CASSETTE INPUTS
NO EXTERNAL COMPONENTS REQUIRED
FULLY PROGRAMMABLE VIA I
2
C BUS
LOW DISTORTION AND NOISE
DESCRIPTION
The TDA7403 is a high performance signal proc-
essor specifically designed for car radio applica-
tions focused on the low-end market.
The device includes a complete audioprocessor
and a stereo decoder with noiseblanker.
Switched-capacitors design technique allows to
obtain all these features without external compo-
nents or adjustments. Using TDA7403 results is
in a very performant low-cost signal processing
application
The device is fully programmable by I
2
C bus in-
terface allowing to customize key device parame-
ters and especially filter characteristics.
The BICMOS process combined with the opti-
mized signal processing assure low noise and
low distortion performances.
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
October 1998

SUPPLY
DEMODULATOR
+ STEREO ADJUST
+ STEREO BLEND
CREF
OUT LR
D98AU918
DIGITAL CONTROL
PILOT
CANCELLATION
V
S
CASS L
INPUT
MULTIPLEXER
+
AUTO ZERO
MPX
VOLUME BASSTREBLE
OUT LR
OUT LF
OUT RR
OUT RF
OUT LF
OUT RR
OUT RF
SCL
SDA
80KHz
LP
FM R
FM L
PLL
25KHz
LP
S&H
HIGH
CUT
CONTROL
PULSE
FORMER
D
LEVEL
AM
CASS R
GND
SM
SOFT
MUTE
PIL
DET
I
2
C BUS
NOISE
BLANKER
A
8
1
2
9
15
14 20
11 17
19
16
18
12
13
10
BLOCK DIAGRAM
SO20
ORDERING NUMBER: TDA7403D
TDA7403
BASIC SIGNAL PROCESSOR
PRELIMINARY DATA
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