TDA7461N Datasheet, PDF (1/31 Pages) STMicroelectronics – CAR RADIO SIGNAL PROCESSOR

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TDA7461N
CAR RADIO SIGNAL PROCESSOR
HIGH PERFORMANCE SIGNAL PROCES-
SOR FOR CAR RADIO SYSTEMS
DEVICE INCLUDES AUDIO PROCESSOR,
STEREO DECODER, NOISEBLANKER AND
MULTIPATH DETECTOR
NO EXTERNAL COMPONENTS REQUIRED
FULLY PROGRAMMABLE VIA I²C BUS
LOW DISTORTION
LOW NOISE
DESCRIPTION
The TDA7461N is a high performance signal
processor specifically designed for car radio ap-
plications.
The device includes a complete audioprocessor
and a stereo decoder with noiseblanker,
stereoblend and all signal processing functions
necessary for state-of-the-art as well as future car
radio systems.
Switched-capacitors design technique allows to
obtain all these features without external compo-
BLOCK DIAGRAM
SO28
ORDERING NUMBER: TDA7461ND
nents or adjustments. This means that higher
quality and reliability walks alongside an overall
cost saving.
The CSP is fully programmable by I²C bus inter-
face allowing to customize key device parameters
and especially filter characteristics.
The BICMOS process combined with the opti-
mized signal processing assure low noise and
low distortion performances.
CDL CDG CDR
7
6
5
10
AM
3
CASS R
4
CASS L
9
PHONE
INPUT
MULTIPLEXER
+
AUTO ZERO
MIXING
STAGE
PHONE
BEEP
8
PH GND
LOUDNESS
VOLUME
SMUTE
17
SOFT
MUTE
TREBLE
DIGITAL CONTROL
28
BASS
27 1 2
23
OUT LR
OUT LR
25
OUT LF
OUT LF
22
OUT RR
OUT RR
24
OUT RF
OUT RF
I²C BUS
18
SCL
19
SDA
16
MUX R
15
MUX L
11
MPX
80KHz
LP
PILOT
CANCELLATION
DEMODULATOR
+ STEREO ADJUST
+ STEREO BLEND
25KHz
LP
S &H
HIGH
CUT
CONTROL
21
VS
SUPPLY
20 26
GND CREF
PLL
PIL
DET
MULTIPATH-
DETECTOR
13
MPIN
14
MPOUT
NOISE
BLANKER
PULSE
FORMER
D
A
12
LEVEL
D97AU646A
June 2000
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