TDA7405
EQUALIZER CARRADIO SIGNAL PROCESSOR
1
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FEATURES
3 STEREO INPUTS
3 MONO INPUTS
DYNAMIC-COMPRESSION-STAGE FOR CD
BASS, TREBLE AND LOUDNESS CONTROL
EQ-FILTERS FOR SEPARATE FRONT/REAR-
EQUALIZATION
VOICE-BAND-FILTER FOR MIXING-CHANNEL
DIRECT MUTE AND SOFTMUTE
INTERNAL BEEP
FOUR INDEPENDENT SPEAKER-OUTPUTS
INDEPENDENT SECOND SOURCE-SELECTOR
FULL MIXING CAPABILITY
PAUSE DETECTOR
Figure 1. Package
TQFP44
Table 1. Order Codes
Part Number
TDA7405
Package
TQFP44
1.2 Digital control:
■
I
2
C-BUS INTERFACE
DESCRIPTION
1.1 Stereodecoder
■
RDS MUTE
■
NO EXTERNAL ADJUSTMENTS
■
AM/FM NOISEBLANKER WITH SEVERAL
TRIGGER CONTROLS
■
PROGRAMMABLE MULTIPATH DETECTOR
■
QUALITY DETECTOR OUTPUT
2
The device includes a high performance audioprocessor
and a stereodecoder-noiseblanker combination with the
whole low frequency signal processing necessary for
state-of-the-art as well as future carradios. The digital
control allows a programming in a wide range of all the
filter characteristics. Also the stereodecoder part offers
several possibilities of programming especially for the
adaptation to different IF-devices.
Figure 2. BLOCK DIAGRAM
May 2004
REV. 2
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TDA7405
Table 2. SUPPLY
Symbol
V
s
I
s
SVRR
Parameter
Supply Voltage
Supply Current
Ripple Rejection @ 1KHz
V
s
= 9V
Audioprocessor(all Filters flat)
Stereodecoder + Audioprocessor
Test Condition
Min.
7.5
45
Typ.
9
65
60
55
Max.
10.5
85
Unit
V
mA
dB
dB
Table 3. THERMAL DATA
Symbol
Parameter
Value
65
Unit
°C/W
R
Th j-pins
Thermal Resistance Junction-pins max
Table 4. ABSOLUTE MAXIMUM RATINGS
Symbol
V
s
T
amb
T
stg
Operating Supply Voltage
Operating Temperature Range
Storage Temperature Range
Parameter
Value
10.5
-40 to 85
-55 to +150
Unit
V
°C
°C
3
ESD
All pins are protected against ESD according to the MIL883 standard.
Figure 3. PIN CONNECTION
(Top view)
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TDA7405
Figure 4. BLOCK DIAGRAM
(Enlarged view)
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TDA7405
4
AUDIOPROCESSOR PART
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
Mixing stage
Loudness
internal Beep with 3 frequencies + diagnostic setting (19kHz tone)
Beep, Phone,Navigation and FM mixable to all speaker-outputs (see Figure 20)
programmabe Voice-Band Filter
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
Bass
2nd order frequency response
center frequency programmable in 8 steps
DC gain programmable
± 15 x 0.5dB steps
Treble
2nd order frequency response
center frequency programmable in 4 steps
± 15 x 1dB steps
Equalizer
two stereo equalizing-filters for separate front/rear adaption
1st filter center-frequency programmable in 16 steps (4 steps/octave, min 63Hz, max
840Hz)
2nd filter center-frequency programmable in 16 steps (4 steps/octave, min 300Hz,
max 4kHz)
quality factor programmable in 4 steps
± 15 x 1dB steps
selectable flat-mode
Speaker
4 independent speaker controls in 1dB steps
control range 95dB
separate Mute
Mute Functions
Pause Detector
Compander
direct mute
digitally controlled SoftMute with 4 programmable mute-times
programmable threshold
dynamic range compression for use with CD
2:1 compression rate
programmable max. gain
Features:
Input Multiplexer
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TDA7405
Table 5. ELECTRICAL CHARACTERISTICS
(V
S
=9V; T
amb
=25°C; R
L
=10kΩ; all gains=0dB; f=1kHz; unless otherwise specified)
Symbol
INPUT SELECTOR
R
in
V
CL
S
IN
G
IN MIN
G
IN MAX
G
STEP
V
DC
Input Resistance
Clipping Level
Input Separation
Min. Input Gain
Max. Input Gain
Step Resolution
DC Steps
Adjacent Gain Steps
G
MIN
to G
MAX
V
offset
Remaining offset with AutoZero
all single ended Inputs
70
2.0
80
-1
13
0.5
-5
-10
100
2.2
100
0
15
1
1
1
0.5
+1
17
1.5
5
10
130
kΩ
V
RMS
dB
dB
dB
dB
mV
mV
mV
Parameter
Test Condition
Min.
Typ.
Max.
Unit
DIFFERENTIAL STEREO INPUTS
R
in
G
CD
Input Resistance
(see Fig. 1)
Gain
Differential
only at true differential input
70
-1
-5
-11
CMRR
Common Mode Rejection Ratio
V
CM
= 1V
RMS
@ 1kHz
V
CM
= 1V
RMS
@ 10kHz
e
NO
Output-Noise @ Speaker-Outputs 20Hz - 20kHz, flat; all stages 0dB
46
46
100
0
-6
-12
70
60
9
15
130
1
-7
-13
kΩ
dB
dB
dB
dB
dB
µV
DIFFERENTIAL MONO INPUTS
R
in
CMRR
Input Impedance
Common Mode Rejection Ratio
Differential
V
CM
= 1V
RMS
@ 1kHz
V
CM
= 1V
RMS
@ 10kHz
BEEP CONTROL
V
RMS
f
Beep
Beep Level
Beep Frequency
Mix-Gain = 6dB
f
Beep1
f
Beep2
f
Beep3
f
Beep4
1. The Level for the 19kHz-Testtone is 2.1V
RMS
40
46
46
56
70
60
72
kΩ
dB
dB
250
470
740
1.7
18
350
1)
500
780
1.8
19
500
530
820
1.9
20
mV
Hz
Hz
kHz
kHz
MIXING CONTROL
M
LEVEL
G
MAX
A
MAX
A
STEP
Mixing Ratio
Max. Gain
Max. Attenuation
Attennuation Step
Main / Mix-Source
13
-83
0.5
-6/-6
15
-79
1
17
-75
1.5
dB
dB
dB
dB
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