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TDA7412
October 2003
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
Stereodecoder:
s
RDS MUTE
s
NO EXTERNAL ADJUSTMENTS
s
AM/FM NOISEBLANKER WITH SEVERAL
TRIGGER CONTROLS
s
PROGRAMMABLE MULTIPATH DETECTOR
s
QUALITY DETECTOR OUTPUT
Digital Control:
I
2
C-BUS INTERFACE
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.
TQFP44
ORDERING NUMBER: TDA7412
CARRADIO SIGNAL PROCESSOR
TDA7412
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PIN CONNECTION (Top view)
ESD:
All pins are protected against ESD according to the MIL883 standard.
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
SUPPLY
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
10.5
V
T
amb
Operating Temperature Range
-40 to 85
C
T
stg
Storage Temperature Range
-55 to +150
C
Symbol
Parameter
Value
Unit
R
th j-pins
Thermal Resistance Junction-pins max
65
C/W
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
7.5
9
10
V
I
S
Supply Current
V
S
= 9V
35
50
65
mA
SVRR
Ripple Rejection @ 1kHz
Audioprocessor (all Filters flat)
60
dB
Stereodecoder + Audioprocessor
55
dB
1
2
3
5
6
4
7
8
9
10
17
11
18
19
20
21
22
44
43
42
41
39
40
38
37
36
35
34
28
27
26
24
23
25
33
32
31
29
30
SE1L
SE1R
FD1L+/SE3L
FD1L-/SE2L
FD1R+/SE3R
FD1R-/SE2R
FD2L+
FD2L-
FD2R+
FD2R-
AM
AM IF
MPX
LEVEL
MPIN
MPOUT
QUAL
SM
GND
SDA
SCL
VDD
ACINLF
SWINR
SWINL
ACOUTR
ACOUTL
CREF
MUX/PAUSE
MD1/SE4R
MD1G/SE4L
MD2
MD2G
OUTSSR
OUTSSL
OUTSWR
OUTSWL
OUTRR
OUTRF
OUTLR
OUTLF
ACINRR
ACINRF
ACINLR
D00AU1131
12
13
14
15
16
TDA7412
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Audioprocessor Part Features:
Input Multiplexer
2 fully differential CD stereo inputs with programmable attenuation
1 single-ended stereo input
2 differential mono input
1 single-ended mono input
In-Gain 0..15dB, 1dB steps
internal Offset-cancellation (AutoZero)
separate second source-selector
Beep
internal Beep with 4 frequencies
Mixing stage
Beep, Phone and Navigation mixable to all speaker-outputs
Loudness
programmable center frequency and frequency response
15 x 1dB steps
selectable flat-mode (constant attenuation)
Volume
0.5dB attenuator
100dB range
soft-step control with programmable times
Compander
dynamic range compression for use with CD
2:1 compression rate
programmable max. gain
Bass
2nd order frequency response
center frequency programmable in 8 steps
DC gain programmable
+ 15 x 1dB steps
Treble
2nd order frequency response
center frequency programmable in 4 steps
+15 x 1dB steps
Voice Bandpass
2nd order butterworth highpass filter with programmable cut-off frequency
2nd order butterworth lowpass filter with programmable cut-off frequency
selectable flat-mode
Speaker
4 independent speaker controls in 1dB steps
control range 95dB
separate Mute
Subwoofer
single-ended stereo output
independent stereo level controls in 1dB steps
control range 95dB
separate Mute
Mute Functions
direct mute
digitally controlled SoftMute with 4 programmable mute-times
Pause Detector
programmable threshold
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TDA7412
ELECTRICAL CHARACTERISTICS
V
S
= 9V; T
amb
= 25C; R
L
= 10k
; all gains = 0dB; f = 1kHz; unless otherwise specified
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
INPUT SELECTOR
R
in
Input Resistance
all single ended Inputs
70
100
130
k
V
CL
Clipping Level
1.8
2.2
V
RMS
S
IN
Input Separation
80
100
dB
G
IN MIN
Min. Input Gain
-1
0
+1
dB
G
IN MAX
Max. Input Gain
13
15
17
dB
G
STEP
Step Resolution
0.5
1
1.5
dB
V
DC
DC Steps
Adjacent Gain Steps
-5
1
5
mV
G
MIN
to G
MAX
-10
6
10
mV
V
offset
Remaining offset with AutoZero
0.5
mV
DIFFERENTIAL STEREO INPUTS
R
in
Input Resistance
(see Figure 1)
Differential
70
100
130
k
G
CD
Gain
only at true differential input
-1
0
1
dB
-5
-6
7
dB
-11
-12
-13
dB
CMRR
Common Mode Rejection Ratio
V
CM
= 1V
RMS
@ 1kHz
46
70
dB
V
CM
= 1V
RMS
@ 10kHz
46
60
dB
e
NO
Output-Noise @ Speaker-Outputs 20Hz - 20kHz, flat; all stages 0dB
9
15
V
DIFFERENTIAL MONO INPUTS
R
in
Input Impedance
Differential
40
56
72
k
CMRR
Common Mode Rejection Ratio
V
CM
= 1V
RMS
@ 1kHz
40
70
dB
V
CM
= 1V
RMS
@ 10kHz
40
60
dB
BEEP CONTROL
V
RMS
Beep Level
Mix-Gain = 6dB
250
350
500
mV
f
Beep
Beep Frequency
f
Beep1
570
600
630
Hz
f
Beep2
740
780
820
Hz
f
Beep1
1.48
1.56
1.64
kHz
f
Beep1
2.28
2.4
2.52
kHz
MIXING CONTROL
M
LEVEL
Mixing Ratio
Main / Mix-Source
-6/-6
dB
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