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PDF 7403 Data sheet ( Hoja de datos )
| Número de pieza | 7403 | |
| Descripción | BASIC SIGNAL PROCESSOR | |
| Fabricantes | STMicroelectronics | |
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Hay una vista previa y un enlace de descarga de 7403 (archivo pdf) en la parte inferior de esta página. Total 26 Páginas | ||
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® TDA7403
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 I2C 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
BLOCK DIAGRAM
BASIC SIGNAL PROCESSOR
PRELIMINARY DATA
SO20
ORDERING NUMBER: TDA7403D
application
The device is fully programmable by I2C 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.
8
AM
CASS R
CASS L
1
2
INPUT
MULTIPLEXER
+
AUTO ZERO
VOLUME
SM
11
SOFT
MUTE
TREBLE
BASS
DIGITAL CONTROL
OUT LR
OUT LF
OUT RR
OUT RF
17
19
16
18
OUT LR
OUT LF
OUT RR
OUT RF
I2C BUS
12
SCL
13
SDA
9
MPX
80KHz
LP
FM R
FM L
PILOT
CANCELLATION
DEMODULATOR
+ STEREO ADJUST
+ STEREO BLEND
25KHz
LP
S&H
HIGH
CUT
CONTROL
15
VS
SUPPLY
PLL
PIL
DET
14 20
GND CREF
NOISE
BLANKER
PULSE
FORMER
D
A
10
LEVEL
D98AU918
October 1998
1/26
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1 page  
TDA7403
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
VOLUME CONTROL
GMAX
Max Gain
AMAX
Max Attenuation
ASTEP
Step Resolution
EA Attenuation Set Error
ET Tracking Error
VDC DC Steps
LOUDNESS CONTROL
ASTEP
Step Resolution
AMAX
Max. Attenuation
fCMIN
Lower Center Frequency
fCMAX
Higher Center Frequency
SOFT MUTE
AMUTE Mute Attenuation
TD Delay Time
VTHlow
VTHhigh
RPU
VPU
Low Threshold for SM Pin (1)
High Threshold for SM Pin
Internal Pull-up Resistor
Pull-up Voltage
SOFT STEP
TSW Switch Time
BASS CONTROL
CRANGE Control Range
ASTEP
Step Resolution
fC Center Frequency
QBASS
Quality Factor
DCGAIN Bass-Dc-Gain
Test Condition
G = -20 to 20dB
G = -60 to 20dB
Adjacent Attenuation Steps
From 0dB to GMIN
T1
T2
T3
T4
fC1
fC2
fC3
fC4
Q1
Q2
Q3
Q4
DC = off
DC = on
1) SM pin is active low (mute condition)
2) See description of Audioprocessor Part - Bass & Treble filter characteristics programming
Min. Typ. Max. Unit
20 dB
79 dB
1 dB
-1.25
0
1.25 dB
-4 0
3 dB
2 dB
0.1 3 mV
0.5 5 mV
1 dB
15 dB
200 Hz
400 Hz
70 100
dB
0.48 ms
0.96 ms
40.4 ms
324 ms
1V
2.5 V
70 100 130 KΩ
4.7 V
10 ms
±14
2
60
70
80
100(2)
1
1.25
1.5
2
0
4.4
dB
dB
Hz
Hz
Hz
Hz
dB
dB
5/26
5 Page 
TDA7403
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
STEREOBLEND and HIGHCUT CONTROL
VHCHmin Min.Voltage for NO Highcut
VHCHmax Max. Voltage for NO Highcut
VHCHstep Step Resolution
VHCLmin Min. Voltage for FULL High cut
VHCLmax Max. Voltage for FULL High cut
42 %REF5V
66 %REF5V
8.4 %REF5V
17 %VHCH
33 %VHCH
Carrier and harmonic suppression at the output
α19 Pilot Signal
f = 19KHz
α38 Subcarrier
f = 38KHz
α57 Subcarrier
f = 57KHz
α76 Subcarrier
f = 76KHz
50 dB
75 dB
62 dB
90 dB
Intermodulation (Note1)
α2 Pilot Signal
α3
fmod = 10KHz; fspur = 1KHz;
fmod = 13KHz; fspur = 1KHz;
65 dB
75 dB
Traffic Radio (Note 2)
α57 Signal
f = 57KHz
70 dB
SCA - Subsidiary Communications Authorization (Note 3)
α67 Signal
f = 67KHz
75 dB
ACI - Adjacent Channel Interference (Note 4)
α114
Signal
f = 114KHz
α190
Signal
f = 190KHz
95 dB
84 dB
Notes to the characteristics:
1. Intermodulation Suppression: measured with: 91% pilot signal; fm = 10kHz or 13kHz.
2. Traffic Radio (V.F.) Suppression: measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% subcarrier (f = 57kHz,
fm = 23Hz AM, m = 60%)
3. SCA ( Subsidiary Communications Authorization ) measured with: 81% mono signal; 9% pilot signal; fm = 1kHz; 10%SCA - subcarrier
( fs = 67kHz, unmodulated ).
4. ACI ( Adjacent Channel Interference ) measured with: 90% mono signal; 9% pilot signal; fm =1kHz; 1% spurious signal
( fs = 110kHz or 186kHz, unmodulated).
11/26
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet 7403.PDF ] | |
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