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PDF TDA7402 Data sheet ( Hoja de datos )
| Número de pieza | TDA7402 | |
| Descripción | CARRADIO SIGNAL PROCESSOR | |
| Fabricantes | ST Microelectronics | |
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TDA7402
CARRADIO SIGNAL PROCESSOR
PRODUCT PREVIEW
s 3 STEREO INPUTS
s 3 MONO INPUTS
s DYNAMIC-COMPRESSION-STAGE FOR CD
s SOFTSTEP-VOLUME
s BASS, TREBLE AND LOUDNESS CONTROL
s VOICE-BAND-FILTER
s DIRECT MUTE AND SOFTMUTE
s INTERNAL BEEP
s FOUR INDEPENDENT SPEAKER-OUTPUTS
s STEREO SUBWOOFER OUTPUT
s INDEPENDENT SECOND SOURCE-
SELECTOR
s FULL MIXING CAPABILITY
s PAUSE DETECTOR
TQFP44
ORDERING NUMBER: TDA7402
Digital Control:
I2C-BUS INTERFACE
Stereodecoder:
s RDS MUTE
s NO EXTERNAL ADJUSTMENTS
s AM/FM NOISEBLANKER WITH SEVERAL
TRIGGER CONTROLS
s PROGRAMMABLE MULTIPATH DETECTOR
s QUALITY DETECTOR OUTPUT
DESCRIPTION
The device includes a high performance audiopro-
cessor and a stereodecoder-noiseblanker combina-
tion with the whole low frequency signal processing
necessary for state-of-the-art as well as future carra-
dios. The digital control allows a programming in a
wide range of all the filter characteristics. Also the
stereodecoder part offers several possibilities of pro-
gramming especially for the adaptation to different
IF-devices.
March 2000
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/59
1 page  
TDA7402
ELECTRICAL CHARACTERISTICS
VS = 9V; Tamb = 25°C; RL = 10kΩ; all gains = 0dB; f = 1kHz; unless otherwise specified
Symbol
Parameter
Test Conditio n
Min. Typ.
INPUT SELECTOR
Rin Input Resistance
all single ended Inputs
70 100
VCL Clipping Level
2.2 2.6
SIN Input Separation
80 100
GIN MIN Min. Input Gain
-1 0
GIN MAX Max. Input Gain
15
GSTEP Step Resolution
1
VDC DC Steps
Adjacent Gain Steps
GMIN to GMAX
1
6
Voffset Remaining offset with AutoZero
0.5
DIFFERENTIAL STEREO INPUTS
Rin Input Resistance
(see Figure 1)
Differential
70 100
GCD Gain
only at true differential input
0
-6
-12
CMRR Common Mode Rejection Ratio VCM = 1VRMS @ 1kHz
46 70
VCM = 1VRMS @ 10kHz
46 60
eNO Output-Noise @ Speaker-Outputs 20Hz - 20kHz, flat; all stages 0dB
9
DIFFERENTIAL MONO INPUTS
Rin Input Impedance
Differential
40 56
CMRR Common Mode Rejection Ratio VCM = 1VRMS @ 1kHz
40 70
VCM = 1VRMS @ 10kHz
40 60
BEEP CONTROL
VRMS Beep Level
Mix-Gain = 6dB
350
fBeep Beep Frequency
fBeep1
600
fBeep2
780
fBeep1
1.56
fBeep1
2.4
MIXING CONTROL
MLEVEL Mixing Ratio
Main / Mix-Source
-6/-6
Max.
130
+1
130
Unit
kΩ
VRMS
dB
dB
dB
dB
mV
mV
mV
kΩ
dB
dB
dB
dB
dB
µV
kΩ
dB
dB
mV
Hz
Hz
kHz
kHz
dB
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5 Page 
TDA7402
1.0 DESCRIPTION OF THE AUDIOPROCESSOR PART
1.1 Input stages
In the basic configuration two full-differential, two mono-differential, one single ended stereo and one single-
ended mono input are available. In addition a dedicated input for the stereodecoder MPX-signal is present.
Figure 1. Input-stages
Full-differential stereo Input 1 (FD1)
The FD1-input is implemented as a buffered full-differential stereo stage with 100kΩ input-impedance at each
input. The attenuation is programmable in 3 steps from 0 to -12dB in order to adapt the incoming signal level.
A 6dB attenuation is included in the differential stage, the additional 6dB are done by a following resistive divid-
er. This input is also configurable as two single-ended stereo inputs (see pin-out).
Full-differential stereo Input 2 (FD2)
The FD2-input has the same general structure as FD1, but with a programmable attenuation of 0 or 6dB em-
bedded in the differential stage.
11/59
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TDA7402.PDF ] | |
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