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PDF TDA7406T Data sheet ( Hoja de datos )
| Número de pieza | TDA7406T | |
| Descripción | CAR RADIO SIGNAL PROCESSOR | |
| Fabricantes | ST Microelectronics | |
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TDA7406T
CAR RADIO SIGNAL PROCESSOR
Audio processor:
s 4 STEREO INPUTS
s 4 MONO INPUTS
s VOLUME CONTROL
s 7 BAND EQUALIZER FILTER CONTROL
s HIGH PASS FILTER FOR SUBWOOFER
APPLICATION
s DIRECT MUTE AND SOFT MUTE
s INTERNAL BEEP GENERATION
s 4 INDEPENDENT SPEAKER OUTPUTS
s SOFT STEP SPEAKER CONTROL
s SUBWOOFER OUTPUT
s 7 BAND SPECTRUM ANALYZER
s FULL MIXING CAPABILITY
s PAUSE DETECTOR
Stereo decoder:
s RDS MUTE
s NO EXTERNAL ADJUSTMENTS
s AM/FM NOISEBLANKER WITH SEVERAL
TRIGGER CONTROLS
s PROGRAMMABLE MULTIPATH DETECTOR
PIN CONNECTION (Top view)
TQFP44
ORDERING NUMBER: TDA7406T
s QUALITY DETECTOR OUTPUT
Digital control:
s I2C-BUS INTERFACE
DESCRIPTION
The device includes a high performance audio pro-
cessor with 7 bands equalizer and spectrum analyzer
plus a stereo decoder-noiseblanker. The whole low
frequency signal processing necessary for state-of-
the-art as well as future car radios is therefore provid-
ed. The digital control allows a full programming not
only of the audioprocessor and filter characteristics
but also in the stereodecoder part especially for the
adaptation to different IF-devices.
April 2001
1/49
1 page  
TDA7406T
Table 1. ELECTRICAL CHARACTERISTICS
(VS=9V; Tamb=25°C; RL=10kΩ; all gains=0dB; f=1kHz; unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
INPUT SELECTOR
Rin Input Resistance
all single ended Inputs
70
VCL Clipping Level
2.2
SIN Input Separation
80
GIN MIN Min. Input Gain
-1
GIN MAX Max. Input Gain
13
GSTEP Step Resolution
0.5
VDC DC Steps
Adjacent Gain Steps
GMIN to GMAX
-5
-10
Voffset Remaining offset with Autozero
DIFFERENTIAL STEREO INPUTS
Rin Input Resistance (see Fig. 1)
Differential
70
CMRR Common Mode Rejection Ratio VCM = 1VRMS @ 1kHz
46
VCM = 1VRMS @ 10kHz
46
eNO Output-Noise @ Speaker-Outputs 20Hz - 20kHz, flat; all stages 0dB
BEEP CONTROL
VRMS Beep Level
Mix-Gain = 6dB
250
fBeep Beep Frequency
fBeep1
475
fBeep2
740
fBeep3
1.48
fBeep4
2.28
MIXING CONTROL
MLEVEL Mixing Ratio
Main / Mix-Source
GMAX Max. Gain
13
AMAX Max. Attenuation
-83
ASTEP Attenuation Step
LOUDNESS CONTROL
0.5
ASTEP Step Resolution
0.5
AMAX Max. Attenuation
-21
fPeak Peak Frequency
fP1
180
fP2 360
fP3 540
fP4 720
VOLUME CONTROL
GMAX Max. Gain
30
Typ.
100
2.6
100
0
15
1
1
61
0.5
100
70
60
11
350
500
780
1.56
2.4
-6/-6
15
-79
1
1
-19
200
400
600
800
32
Max. Unit
130 kΩ
VRMS
dB
1 dB
17 dB
1.5 dB
5 mV
10 mV
mV
130 kΩ
dB
dB
µV
500
525
820
1.64
2.52
mV
Hz
Hz
kHz
kHz
dB
17 dB
-75 dB
1.5 dB
1.5 dB
-17 dB
220 Hz
440 Hz
660 Hz
880 Hz
34 dB
5/49
5 Page 
TDA7406T
2.3 Loudness
There are four parameters programmable in the loudness stage:
s Attenuation: 0 to -19dB attenuation in 1dB steps vs. frequency (see the response at fP = 400Hz in Figure 2).
s Peak Frequency: Four programmable peak frequencies: 200,400,600 and 800Hz (see Figure 3).
s Filter Order: First or second order frequency response (see Figure 4).
s Flat mode: Selectable flat-mode. In flat mode the loudness stage works as a 0dB to -19dB attenuator.
Figure 2. Loudness Attenuation @ fP = 400Hz.
0.0
-5.0
-10.0
dB
-15.0
-20.0
-25.0
10.0
100.0
1.0K
Hz
Figure 3. Loudness Center frequencies @ Attn. = 15dB
0.0
10.0K
-5.0
dB
-10.0
-15.0
-20.0
10.0
100.0
1.0K
Hz
10.0K
11/49
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TDA7406T.PDF ] | |
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