STMICROELECTRONICS TDA7419

TDA7419
3 BAND CAR AUDIO PROCESSOR
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FEATURES
Figure 1. Package
4 STEREO INPUTS
SOFT STEP VOLUME
BASS, MIDDLE, TREBLE AND LOUDNESS
DIRECT MUTE AND SOFTMUTE
FOUR INDEPENDENT SPEAKER OUTPUTS
SUB WOOFER OUTPUT
SOFT STEP SPEAKER/SUBWOOFER
CONTROL
7 BANDS SPECTRUM ANALYZER
DIGITAL CONTROL:
– I2C-BUS INTERFACE
SO-28
Table 1. Order Codes
Part Number
Package
TDA7419
SO-28
TDA7419TR
SO-28 in Tape & Reel
cessor with fully integrated audio filters. The digital
control allows programming in a wide range of filter
characteristics. By the use of BICMOS-process and
linear signal processing low distortion and low noise
are obtained.
DESCRIPTION
The TDA7419 is a high performance signal processor specifically designed for car radio applications.
The device includes a high performance audioproFigure 2. Block Diagram
SAOUT
ACOUTL/
AC2OUTL
MUTE
SACLK
ACOUTR/
AC2OUTR
ACINL/
FILOL
ACINR/
FILOR
Spectrum
Analyzer
DIFFL
DIFFG
InGain
AutoZero
DIFFR
Loudness
SoftMute
Softstep
Volume
Treble
Middle
Softstep
MonoFader
Bass
SE1L
Softstep
MonoFader
INPUT
SE1R
HPF
HPF
Mix
OUTLF
Mix
OUTRF
MULTIPLEXER
SE2L
Softstep
MonoFader
OUTLR
Softstep
MonoFader
OUTRR
SE2R
Subwoofer
LPF
Softstep
MonoFader
Softstep
MonoFader
SUPPLY
VDD GND CREF
March 2005
DIGITAL CONTROL
VREFOUTF
OUTSW/
OUTLR2
MIX/
OUTSW/
OUTRR2
I2C BUS
SCL
SDA
AC2INL/
SE3L
AC2INR/
SE3R
Rev. 2
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TDA7419
Table 2. Supply
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
7.5
8.5
10.5
V
35
40
mA
Vs
Supply Voltage
Is
Supply Current
Vs = 8.5V
30
Ripple Rejection @ 1KHz
Audioprocessor(all Filters flat)
60
SVRR
dB
Table 3. Thermal Data
Symbol
Parameter
Value
Unit
85
°C/W
Value
Unit
10.5
V
-40 to 85
°C
-55 to +150
°C
RTh j-pins Thermal Resistance Junction-pins max
Table 4. Absolute Maximum Ratings
Symbol
Vs
Parameter
Operating Supply Voltage
Tamb
Operating Temperature Range
Tstg
Storage Temperature Range
ESD
All pins are protected against ESD according to the MIL883 standard.
Figure 3. Pin connection (Top view)
ACOUTR/AC2OUTR
1
28
MIX/OUTSW/OUTRR2
ACINR/FILOR
2
27
VREF
ACINL/FILOL
3
26
SAOUT
ACOUTL/AC2OUTL
4
25
SAIN
SE3L/ACINL
5
24
VDD
SE3R/ACINR
6
23
SDA
SE2L
7
22
SCL
SE2R
8
21
MUTE
OUTLF
SE1L
9
20
SE1R
10
19
OUTLR
DIFFL
11
18
OUTRR
DIFFG
12
17
OUTRF
DIFFR
13
16
OUTSW/OUTLR2
CREF
14
15
GND
D04AU1569
2/30
TDA7419
Table 5. Pin Description
Pin
N#
Pin Name
1
ACOUTR / AC2OUTR
2
3
4
Function
I/O
AC coupling right output / DSO filter AC2OUT right channel
O
ACINR / FILOR
AC coupling right input / DSO filter FILO right channel
I/O
ACINL / FILOL
AC coupling left input / DSO filter FILO left channel
I/O
ACOUTL / AC2OUTL
AC coupling left output / DSO filter AC2OUT left channel
O
5
SE3L / ACINL
Single-ended input 3 left channel / AC coupling left input
I
6
SE3R / ACINR
Single-ended input 3 right channel / AC coupling right input
I
7
SE2L
Single-ended input 2 left channel
I
8
SE2R
Single-ended input 2 right channel
I
9
SE1L
Single-ended input 1 left channel
I
10
SE1R
Single-ended input 1 Right channel
I
11
DIFFL
Pseudo differential stereo input left
I
12
DIFFG
Pseudo differential stereo input common
I
13
DIFFR
Pseudo differential stereo input right
I
14
CREF
Reference capacitor
O
15
GND
Ground
S
16
OUTSW / OUTLR2
Subwoofer output /
2nd
rear left output
O
17
OUTRF
Front right output
O
18
OUTRR
Rear right output
O
19
OUTLR
Rear left output
O
20
OUTLF
Front left output
O
21
MUTE
External mute pin
I
22
SCL
I2C bus clock
I
23
SDA
I2C bus data
I/O
24
VDD
Supply
S
25
SAIN
Spectrum analyzer clock input
I
26
SAOUT
27
VREF
28
Spectrum analyzer output
O
Vref output
O
MIX / OUTSW / OUTRR2 Mix input / Additional subwoofer output / 2nd rear right output
I/O
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TDA7419
3
Audio Processor Features:
Input Multiplexer
QD / SE: quasi-differential stereo inputs, with selectable single-ended mode
SE1: stereo single-ended input
SE2: stereo single-ended input
SE3 / AC2IN: stereo single-ended input / DSO filter input
In-Gain 0 to 15dB, 1dB steps
internal offset-cancellation (AutoZero)
separate second source-selector
Mixing stage
mixable to front speaker-outputs
Loudness
2nd order frequency response
programmable center frequency (400Hz/800Hz/2400Hz)
15dB with 1dB steps
selectable low & high frequency boost
selectable flat-mode (constant attenuation)
Volume
+15dB to -79dB with 1dB step resolution
soft-step control with programmable blend times
Bass
2nd order frequency response
center frequency programmable in 4 steps (60Hz/80Hz/100Hz/200Hz)
Q programmable 1.0/1.25/1.5/2.0
DC gain programmable
-15 to 15dB range with 1dB resolution
Middle
2nd order frequency response
center frequency programmable in 4 steps (500Hz/1KHz/1.5KHz/2.5KHz)
Q programmable 0.5/0.75/1.0/1.25
DC gain programmable
-15 to 15dB range with 1dB resolution
Treble
2nd order frequency response
center frequency programmable in 4 steps (10KHz/12.5KHz/15KHz/17.5KHz)
-15 to 15dB range with 1dB resolution
Spectrum analyzer
seven bandpass filters
2nd order frequency response
programmable Q factor for different visual appearance
analog output
controlled by external serial clock
Speaker
4 independent soft step speaker controls, +15dB to -79dB with 1dB steps
Independent programmable mix input with 50% mixing ratio for front speakers
direct mute
Subwoofer
2nd order low pass filter with programmable cut off frequency
single-ended mono output
independent soft step level control, +15dB to -79dB with 1dB steps
Mute Functions
direct mute
digitally controlled SoftMute with 3 programmable mute-times(0.48ms/0.96ms/
123ms)
Effect
gain effect, or high pass effect with fixed external components
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TDA7419
4
ELECTRICAL CHARACTERISTICS
Table 6. Electrical Characteristcs
VS = 8.5V; Tamb = 25°C; RL= 10kΩ ; all gains = 0dB; f = 1kHz; unless otherwise specified
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SUPPLY
Vs
Supply Voltage
8
8.5
10
V
IS
Supply Current
27
37
47
mA
70
100
130
kΩ
INPUT SELECTOR
Rin
Input Resistance
All single ended inputs
VCL
Clipping level
All Input
1.8
2
VRMS
QD input
1.7
2
VRMS
80
100
dB
SIN
Input Separation
GIN MIN
Min. Input Gain
-1
0
1
dB
GIN MAX
Max. Input Gain
13
15
17
dB
GSTEP
Step Resolution
0.5
1
1.5
dB
VDC
Voffset
DC Steps
Adjacent Gain Steps
-5
1
5
mV
GMIN to GMAX
-20
4
20
mV
Remaining offset with AutoZero
0.5
mV
DIFFERENTIAL STEREO INPUTS
Rin
CMRR
eNo
Input Resistance
Differential
70
100
Common Mode Rejection Ratio
VCM =1 VRMS@ 1kHz
46
70
VCM =1 VRMS@ 10kHz
46
Output Noise @ Speaker Outputs 20Hz-20kHz,flat;all stages 0dB
130
KΩ
dB
60
dB
12
µV
MIXING CONTROL
MLEVEL
Mixing Ratio
Main / Mix Source
-6/-6
dB
GMAX
Max Gain
13
15
17
dB
AMAX
Max Attenuation
-83
-79
-75
dB
ASTEP
Step Resolution
0.5
1
1.5
dB
LOUDNESS CONTROL
AMAX
Max Attenuation
-17
-15
-13
dB
ASTEP
Step Resolution
0.5
1
1.5
dB
360
400
440
Hz
720
800
880
Hz
2200
2400
2600
Hz
fPeak
Peak Frequency
fP1
fP2
fP3
VOLUME CONTROL
GMAX
Max Gain
13
15
17
dB
AMAX
Max Attenuation
-83
-79
-75
dB
ASTEP
Step Resolution
EA
Attenuation Set Error
ET
Tracking Error
VDC
DC Steps
0.5
1
1.5
dB
G = -20 to +20dB
-0.75
0
+0.75
dB
G = -79 to -20dB
-4
0
3
dB
2
dB
Adjacent Attenuation Steps
-3
0.1
3
mV
From 0dB to GMIN
-5
0.5
5
mV
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TDA7419
Table 6. Electrical Characteristcs (continued)
VS = 8.5V; Tamb = 25°C; RL= 10kΩ ; all gains = 0dB; f = 1kHz; unless otherwise specified
Symbol
Parameter
Test Condition
Min.
Typ.
80
100
Max.
Unit
SOFT MUTE
AMUTE
TD
Mute Attenuation
Delay Time
T1
0.48
1
ms
T2
0.96
2
ms
123
170
ms
1
V
T3
VTH Low
Low Threshold for SM Pin
VTH High
dB
70
High Threshold for SM Pin
2.5
RPU
Internal pull-up resistor
32
VPU
Internal pull-up Voltage
V
45
58
3.3
kΩ
V
BASS CONTROL
Fc
QBASS
Center Frequency
Quality Factor
fC1
54
fC2
72
80
88
Hz
fC3
90
100
110
Hz
fC4
180
200
220
Hz
ASTEP
DCGAIN
Q1
0.9
1
1.1
1.1
1.25
1.4
Q3
1.3
1.5
1.7
Control Range
Step Resolution
Bass-DC-Gain
66
Q2
Q4
CRANGE
60
DC = off
Hz
1.8
2
2.2
±14
±15
±16
0.5
1
1.5
dB
-1
0
+1
dB
DC = on (shelving filter, use for
cut only)
-4.4
dB
dB
MIDDLE CONTROL
CRANGE
ASTEP
fc
QBASS
±14
Control Range
Step Resolution
Center Frequency
Quality Factor
±15
±16
dB
0.5
1
1.5
dB
fC1
400
500
600
Hz
fC2
0.8
1
1.2
kHz
fC3
1.2
1.5
1.8
kHz
fC4
2
2.5
3
kHz
Q1
0.45
0.5
0.55
Q2
0.65
0.75
0.85
Q3
0.9
1
1.1
Q4
1.1
1.25
1.4
±14
±15
±16
TREBLE CONTROL
CRANGE
ASTEP
fc
6/30
Clipping Level
Step Resolution
Center Frequency
dB
0.5
1
1.5
dB
fC1
8
10
12
kHz
fC2
10
12.5
15
kHz
fC3
12
15
18
kHz
fC4
14
17.5
21
kHz
TDA7419
Table 6. Electrical Characteristcs (continued)
VS = 8.5V; Tamb = 25°C; RL= 10kΩ ; all gains = 0dB; f = 1kHz; unless otherwise specified
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SPEAKER ATTENUATORS
GMAX
Max Gain
14
15
16
dB
AMAX
Max Attenuation
-83
-79
-75
dB
ASTEP
Step Resolution
0.5
1
1.5
dB
AMUTE
Mute Attenuation
80
90
Adjacent Attenuation Steps
-5
0.1
d = 0.3%
1.8
2
EE
Attenuation Set Error
VDC
DC Steps
dB
2
dB
5
mV
AUDIO OUTPUTS
VCL
ROUT
Clipping level
Output impedance
RL
Output Load Resistance
CL
Output Load Capacitor
VDC
30
VRMS
100
2
DC Voltage Level
Ω
kΩ
10
nF
3.8
4.0
4.2
V
SUBWOOFER ATTENUATOR
GMAX
Max Gain
14
15
16
dB
AMAX
Max Attenuation
-83
-79
-75
dB
ASTEP
Step Resolution
0.5
1
1.5
dB
AMUTE
Mute Attenuation
80
90
2
dB
EE
Attenuation Set Error
VDC
DC Steps
dB
Adjacent Attenuation Steps
-5
1
5
mV
fLP1
72
80
88
Hz
fLP2
108
120
132
Hz
fLP3
144
160
176
Hz
SUBWOOFER LOWPASS
fLP
Lowpass Corner Frequency
HPF EFFECT
GMAX
Max Gain
21
22
23
dB
GMIN
Min Gain
3
4
5
dB
ASTEP
Step Resolution
1.5
2
2.5
dB
SPECTRUM ANALYZER CONTROL
3.3
V
fC1
Center Frequency Band 1
5.5
62
69
Hz
fC2
Center Frequency Band 2
141
157
173
Hz
fC3
Center Frequency Band 3
356
392
436
Hz
fC4
Center Frequency Band 4
0.9
1
1.1
kHz
fC5
Center Frequency Band 5
2.26
2.51
2.76
kHz
fC6
Center Frequency Band 6
5.70
6.34
6.98
kHz
fC7
Center Frequency Band 7
14.4
16
17.6
kHz
Q
Quality Factor
VSAOut
Output Voltage Range
0
Q1
1.62
1.8
1.98
Q2
3.15
3.5
3.85
fSAClk
Clock Frequency
3
tSadel
Analog Output Delay Time
2
100
kHz
µs
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TDA7419
Table 6. Electrical Characteristcs (continued)
VS = 8.5V; Tamb = 25°C; RL= 10kΩ ; all gains = 0dB; f = 1kHz; unless otherwise specified
Symbol
Parameter
Test Condition
trepeat
Spectrum Analyzer Repeat Time
tintres
Internal Reset Time
Min.
Typ.
Max.
50
Unit
ms
4.5
ms
GENERAL
eNO
S/N
Output Noise
BW=20Hz to 20 kHz all gain =
0dB
12
20
µV
BW=20Hz to 20 kHz Output
muted
6
15
µV
Signal to Noise Ratio
all gain = 0dB flat; Vo =2VRMS
100
D
Distortion
VIN = 1VRMS; all stages 0dB
0.01
SC
Channel Separation left/right
5
80
90
dB
0.1
%
dB
DESCRIPTION OF THE AUDIOPROCESSOR
5.1 Input stages
In the basic configuration, one stereo quasi-differential and three (two in case of DSO applications) single
ended stereo inputs are available.
5.1.1 Quasi-differential stereo Input (QD)
The QD input is implemented as a buffered quasi-differential stereo stage with 100k input-impedance at
each input. The attenuation is fixed to -3dB in order to adapt the incoming signal level.
5.1.2 Single-ended stereo input (SE1, SE2, SE3/AC2IN)
The input-impedance at each input is 100k and the attenuation is fixed to -3dB for incoming signals. The
input for SE3 is also configurable as part of the interface for external filters in DSO applications (AC2IN)
Figure 4. Input Stage
QD_L
QD_G
QD_R
QD
QD
Main
Source
In Gain
SE4
SE1_L
SE1_R
SE1
SE1
SE2
SE2
SE3
SE3
SE2_L
SE2_R
AC2IN_L/SE3L
AC2IN_R/SE3R
Second
Source
Output Stage
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TDA7419
5.2 AutoZero
The AutoZero allows a reduction of the number of pins as well as external components by canceling any
offset generated by or before the In-Gain-stage (Please notice that externally generated offsets, e.g. generated through the leakage current of the coupling capacitors, are not canceled).
The auto-zeroing is started every time the input source is changed and needs max. 0.3ms for the alignment. To avoid audible clicks the Audio processor is muted before the loudness stage during this time.
The AutoZero feature is only present in the main signal-path.
5.2.1 AutoZero-Remain
In some cases, for example if the P is executing a refresh cycle of the IIC-Bus-programming, it is not useful to start a new AutoZero-action because no new source is selected and an undesired mute would appear at the outputs. For such applications, it can be switched in the AutoZero-Remain-Mode (Bit 6 of the
subaddress-byte). If this bit is set to high, the AutoZero will not be invoked and the old adjustment-value
remains.
5.3 Loudness
There are four parameters programmable in the loudness stage:
5.3.1 Attenuation
Figure 5 shows the attenuation as a function of frequency at fP = 400Hz
Figure 5. Loudness Attenuation @ fP = 400Hz.
5
0
-5
-10
-15
-20
10
100
1K
10K
9/30
TDA7419
5.3.2 Peakr Frequency
Figure 6 shows the three possible peak-frequencies 400Hz , 800Hz and 2.4kHz.
Figure 6. Loudness Center frequencies @ Attn. = 15dB
5
0
-5
-10
-15
-20
10
100
1K
10K
5.3.3 Low & High Frequency Boost
Figure 7 shows the different Loudness-shapes in low & high frequency boost.
Figure 7. Loudness Attenuation , fC = 2.4KHz
5
0
-5
-10
-15
-20
10
10/30
100
1K
10K
TDA7419
5.3.4 Flat Mode
In flat mode the loudness stage works as a 0dB to -15dB attenuator.
5.4 SoftMute
The digitally controlled SoftMute stage allows muting/demuting the signal with a I2C-bus programmable
slope. The mute process can either be activated by the SoftMute pin or by the I2C-bus. This slope is realized in a special S-shaped curve to mute slow in the critical regions (see Figure 8).
For timing purposes the Bit0 of the I2C-bus output register is set to 1 from the start of muting until the end
of demuting.
Figure 8. Sofmute Timing
EXT.
MUTE
1
+SIGNAL
REF
-SIGNAL
1
I2C BUS
OUT
Time
D97AU634
Note: Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal
5.5 SoftStep-Volume
When the volume-level is changed audible clicks could appear at the output. The root cause of those clicks
could either be a DC-Offset before the volume-stage or the sudden change of the envelope of the audiosignal. With the SoftStep feature both kinds of clicks could be reduced to a minimum and are no more
audible. The blend-time from one step to the next is programmable in four steps.
Figure 9. SoftStep Timing
VOUT
1dB
0.5dB
Time
SS Time
-0.5dB
-1dB
D00AU1170
Note: For steps more than 0.5dB the SoftStep mode should be deactivated because it could generate a hard 1dB step during the blend-time.
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TDA7419
5.6 Bass
There are four parameters programmable in the bass stage:
5.6.1 Attenuation
Figure 9 shows the attenuation as a function of frequency at a center frequency of 80Hz.
Figure 10. Bass Control @ fC = 80Hz, Q = 1
15.0
10.0
5.0
dB
0.0
-5.0
-10.0
-15.0
10.0
100.0
Hz
1.0K
10.0K
5.6.2 Center Frequency
Figure 11 shows the four possible center frequencies 60, 80, 100 and 200Hz.
Figure 11. Bass center Frequencies @ Gain = 15dB, Q = 1
16
12
8
4
0
-4
10
12/30
100
1K
10K
TDA7419
5.6.3 Quality Factors
Figure 12 shows the four possible quality factors 1, 1.25, 1.5 and 2.
Figure 12. Bass Quality factors @ Gain = 14dB, fC = 80Hz
15.0
12.5
10.0
7.5
5.0
2.5
0.0
10.0
100.0
1.0K
10.0K
5.6.4 DC Mode
It is used for cut only for shelving filter. In this mode the DC-gain is increased by 4.4dB. Inaddition the programmed center frequency and quality factor is decreased by 25% which can be used to reach alternative center frequencies or quality factors.
Figure 13. Bass normal and DC Mode @ Gain = 14dB, fC = 80Hz
15.0
12.5
10.0
7.5
5.0
2.5
0.0
10.0
100.0
1.0K
10.0K
Note: The center frequency, Q and DC-mode can be set fully independently.
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TDA7419
5.7 Middle
There are three parameters programmable in the middle stage:
5.7.1 Attenuation
Figure 14 shows the attenuation as a function of frequency at a center frequency of 1kHz.
Figure 14. Middle Control @ fC = 1 kHz, Q = 1
5.7.2 Center Frequency
Figure 14 shows the four possible center frequencies 500Hz, 1kHz, 1.5kHz and 2.5kHz.
Figure 15. Middle center Frequencies @ Gain = 14dB, Q = 1
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TDA7419
5.7.3 Quality Factors
Figure 16 shows the four possible quality factors 0.5, 0.75, 1 and 1.25.
Figure 16. Middle Quality factors @ Gain = 14dB, fc = 1kHz
5.8 Treble
There are two parameters programmable in the treble stage:
5.8.1 Attenuation
Figure 16 shows the attenuation as a function of frequency at a center frequency of 17.5kHz.
Figure 17. Treble Control @ fC = 17.5kHz
20
15
10
5
0
-5
-10
-15
-20
10
100
1K
10K
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TDA7419
5.8.2 Center Frequency
Figure 18 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz.
Figure 18. Treble Center Frequencies @ Gain = 15dB
20
15
10
5
0
-5
10
100
1K
10K
5.9 Subwoofer Filter
The subwoofer lowpass filter has butterworth characteristics with programmable cut-off frequency (80/
120/160Hz)
Figure 19. Subwoofer Control
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TDA7419
5.10 Spectrum Analyzer
A fully integrated seven-band spectrum analyzer with programmable quality factor is present. The spectrum analyzer consists of seven band pass filters with rectifier and sample capacitor that stores the maximum peak signal level since the last read cycle. This peak signal level can be read by a microprocessor
at the SAout-pin. To allow easy interfacing to an analog port of the microprocessor, the output voltage at
this pin is referred to device ground.
The microprocessor starts a read cycle with the negative going clock edge at the SAclk input. On the following positive clock edges, the peak signal level for the band pass filters is subsequently switched to
SAout. Each analog output data is valid after the time tSadel. A reset of the sample capacitors is induced
whenever SAclk remains high for the time tintres. Note that a proper reset requires the clock signal SAclk
to be held at high potential. Figure 20 shows the block diagram and figure 21 illustrates the read cycle
timing of the spectrum analyzer.
Figure 20. Spectrum analyzer block diagram
Figure 21. Timing of the spectrum analyzer
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TDA7419
5.11 AC-Coupling
In some applications additional signal manipulations are desired, such as additional band equalizations.
For this purpose, an AC-Coupling can be placed before the loudness attenuator or speaker-attenuators,
which can be activated or internally shorted by I2C-Bus. In short condition, the input-signal of the speakerattenuator is available at the AC-Outputs. The input-impedance of this AC-Inputs is 50kΩ.
Figure 22. Diagram of AC coupling
ACOUTL
ACINL
ACOUTR
ACINR
From Input MUX
InGain
Filters
Speakers
To Output
5.12 DSO Applications
For DSO applications, DSO filter is available for additional processing after the speaker control. It is a 2nd
order Butterworth highpass filter with selectable flat mode. Figure 23 shows the diagram of the DSO that
includes an external RC network.
Figure 23. DSO diagram
External RC network
ACOUT
/AC2OUT
SE3IN
/AC2IN
ACIN
/FILO
Gain Control
From speaker
18/30
To
output
TDA7419
5.13 Output Selector and Mixing
The output-selector allows the front and rear speakers to connect to different sources. The setup of the
output selector is shown in Figure 24. A Mixing-stage is placed after the front speaker-attenuator and can
be set to mixing-mode. Having a full volume-attenuator for the mix-signal, the stage offers a wide flexibility
to adapt the mixing levels.
Figure 24. Output Selector
Mix_in
Attenuator
Front
Main
Attenuator
Rear
Second
Attenuator
BassL+BassR
Subwoofer
filter
Attenuator
Subwoofer
output
5.14 Audioprocessor Testing
In the test mode, which can be activated by setting bit D7 of the IIC subaddress byte and bit D0 of the
testing audioprocessor byte, several internal signals are available at the SE1R pin. In this mode, the input
resistance of 100kOhm is disconnected from the pin. Internal signals available for testing are listed in the
data-byte specification.
5.15 Test Circuit
Figure 25. Test Circuit
19/30
TDA7419
I2C BUS SPECIFICATION
6
6.1 Interface Protocol
The interface protocol comprises:
– a start condition (S)
– a chip address byte (the LSB determines read/write transmission)
– a subaddress byte
– a sequence of data (N-bytes + acknowledge)
– a stop condition (P)
– the max. clock speed is 500kbits/s
– 3.3V logic compatible
6.1.1 Receive Mode
S
1
0
0 0
1
0
0
R/W
ACK
TS
AZ
AI
A4
A3
A2
A1
A0
ACK
DATA
ACK
P
S = Start
"0" -> Receive Mode (Chip can be programmed by µP)
R/W =
"1" -> Transmission Mode (Data could be received by µP)
ACK = Acknowledge
P = Stop
TS = Testing mode
AZ = Auto zero remain
AI = Auto increment
6.1.2 Transmission Mode
1
S
0
0
0
1
0
0
R/W
ACK
X
X
X
X
X
X
X
SM
ACK
P
SM = Soft mute activated for main channel
X = Not Used
The transmitted data is automatic updated after each ACK. Transmission can be repeated without new
chip address.
6.1.3 Reset Condition
A Power-On-Reset is invoked if the Supply-Voltage is below than 3.5V. After that the following data is written automatically into the registers of all subaddresses:
MSB
1
20/30
LSB
1
1
1
1
1
1
0
TDA7419
6.2
Subaddress (receive mode)
Table 7. Subaddress (receive mode)
MSB
I2
LSB
I1
I0
A4
A3
A2
A1
FUNCTION
A0
Testing Mode
Off
On
0
1
Auto Zero Remain
Off
On
0
1
Auto Increment Mode
Off
On
0
1
0
0
0
0
0
Main Source Selector
0
0
0
0
1
Main Loudness
0
0
0
1
0
Soft Mute / Clock Generator
0
0
0
1
1
Volume
0
0
1
0
0
Treble
0
0
1
0
1
Middle
0
0
1
1
0
Bass
0
0
1
1
1
Second Source Selector
0
1
0
0
0
Subwoofer / Middle / Bass
0
1
0
0
1
Mixing / Gain Effect
0
1
0
1
0
Speaker Attenuator Left Front
0
1
0
1
1
Speaker Attenuator Right Front
0
1
1
0
0
Speaker Attenuator Left Rear
0
1
1
0
1
Speaker Attenuator Right Rear
0
1
1
1
0
Mixing Level Control
0
1
1
1
1
Subwoofer Attenuator
1
0
0
0
0
Spectrum Analyzer / Clock Source / AC Mode
1
0
0
0
1
Testing Audio Processor
21/30
TDA7419
6.3
Data Byte Specification
Table 8. Main Selector (0)
MSB
D7
LSB
D6
0
0
:
1
1
D5
0
0
:
1
1
D4
0
0
:
1
1
D3
D2
D1
D0
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
x
FUNCTION
Source Selector
QD/SE: QD
SE1
SE2
SE3
QD/SE: SE
mute
mute
Input Gain
0dB
1dB
:
14dB
15dB
0
1
:
0
1
Auto Zero
on
off
0
1
Table 9. Main Loudness (1)
MSB
D7
LSB
D6
D5
0
0
1
1
0
1
0
1
22/30
D4
0
1
0
1
D3
D2
D1
D0
0
0
:
1
1
0
0
:
1
1
0
0
:
1
1
0
1
:
0
1
FUNCTION
Attenuation
0dB
-1dB
:
-14dB
-15dB
Center Frequency
Flat
400Hz
800Hz
2400Hz
High Boost
on
off
Loudness Soft Step
on
off
TDA7419
Table 10. Soft Mute / Clock Generator (2)
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
0
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
Soft Mute
on
off
Pin Influence for Mute
Pin and IIC
IIC
0
1
0
0
1
FUNCTION
Soft Mute Time
0.48ms
0.96ms
123ms
0
1
x
Soft Step Time
0.160ms
0.321ms
0. 642ms
1.28ms
2.56ms
5.12ms
10.24ms
20.48ms
0
1
0
1
0
1
0
1
Clock Fast Mode
on
off
0
1
Table 11. Volume / Speaker / Mixing / Subwoofer Attenuation (3, 10-15)
MSB
D7
0
1
LSB
D6
D5
D4
D3
D2
D1
D0
0
0
:
0
0
0
:
1
1
1
0
0
:
0
0
0
:
0
0
1
0
0
:
0
1
1
:
1
1
x
0
0
:
1
0
0
:
1
1
x
0
0
:
1
0
0
:
1
1
x
0
0
:
1
0
0
:
1
1
x
0
1
:
1
0
1
:
0
1
x
FUNCTION
Gain/Attenuation
+0dB
+1dB
:
+15dB
-0dB
-1dB
:
-78dB
-79dB
mute
Soft Step
on
off
23/30
TDA7419
Table 12. Treble Filter (4)
MSB
D7
LSB
D6
0
0
1
1
D5
D4
D3
D2
D1
D0
0
0
:
0
0
1
1
:
1
1
1
1
:
0
0
0
0
:
1
1
1
1
:
0
0
0
0
:
1
1
1
1
:
0
0
0
0
:
1
1
1
0
:
1
0
0
1
:
0
1
FUNCTION
Gain/Attenuation
-15dB
-14dB
:
-1dB
0dB
0dB
+1dB
:
+14dB
+15dB
Treble Center Frequency
10.0kHz
12.5kHz
15.0kHz
17.5kHz
0
1
0
1
Reference Output Select
External Vref (4V)
Internal Vref (3.3V)
0
1
Table 13. Middle Filter (5)
MSB
D7
LSB
D6
0
0
1
1
0
1
24/30
D5
0
1
0
1
D4
D3
D2
D1
D0
0
0
:
0
0
1
1
:
1
1
1
1
:
0
0
0
0
:
1
1
1
1
:
0
0
0
0
:
1
1
1
1
:
0
0
0
0
:
1
1
1
0
:
1
0
0
1
:
0
1
FUNCTION
Gain/Attenuation
-15dB
-14dB
:
-1dB
0dB
0dB
+1dB
:
+14dB
+15dB
Middle Q Factor
0.5
0.75
1
1.25
Middle Soft Step
on
off
TDA7419
Table 14. Bass Filter (6)
MSB
D7
LSB
D6
0
0
1
1
D5
D4
D3
D2
D1
D0
0
0
:
0
0
1
1
:
1
1
1
1
:
0
0
0
0
:
1
1
1
1
:
0
0
0
0
:
1
1
1
1
:
0
0
0
0
:
1
1
1
0
:
1
0
0
1
:
0
1
FUNCTION
Gain/Attenuation
-15dB
-14dB
:
-1dB
0dB
0dB
+1dB
:
+14dB
+15dB
Bass Q Factor
1.0
1.25
1.5
2.0
0
1
0
1
Bass Soft Step
on
off
0
1
Table 15. Second Source Selector (7)
MSB
D7
LSB
D6
0
0
:
1
1
0
1
D5
0
0
:
1
1
D4
0
0
:
1
1
D3
0
1
:
0
1
D2
D1
D0
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
x
FUNCTION
Source Selector
QD/SE: QD
SE1
SE2
SE3
QD/SE: SE
mute
mute
Input Gain
0dB
1dB
:
14dB
15dB
Rear Speaker Source
main source
second source
25/30
TDA7419
Table 16. Subwoofer /Middle / Bass (8)
MSB
D7
LSB
D6
D5
D4
D3
0
0
1
1
0
0
1
1
D2
D1
D0
0
0
1
1
0
1
0
1
FUNCTION
Subwoofer Cut-off Frequency
flat
80Hz
120Hz
160Hz
Middle Center Frequency
500Hz
1000Hz
1500Hz
2500Hz
0
1
0
1
Bass Center Frequency
60Hz
80Hz
100Hz
200Hz
0
1
0
1
Bass DC Mode
on
off
0
1
Smoothing Filter
on
off (bypass)
0
1
Table 17. Mixing / Gain Effect (9)
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
0
1
0
1
0
1
0
1
0
0
:
1
1
1
1
26/30
0
0
:
0
0
0
1
0
0
:
0
0
1
x
0
1
:
0
1
x
x
FUNCTION
D0
Mixing to Left Front Speaker
on
off
Mixing to Right Front Speaker
on
off
Mixing Enable
on
off
Subwoofer Enable (OUTLR2 & OUTRR2)
on
off
Gain Effect for DSO Filter
4dB
6dB
:
20dB
22dB
0dB
0dB
TDA7419
Table 18. Spectrum Analyzer / Clock Source / AC Mode (16)
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
1
0
1
FUNCTION
Spectrum Analyzer Filter Q Factor
3.5
1.75
Reset Mode
IIC
Auto
Spectrum Analyzer Source
Bass
InGain
Spectrum Analyzer Run
on
off
Reset
on
off
Clock Source
internal
external
Coupling Mode
DC Coupling (without DSO)
AC coupling after InGain
DC Coupling (with DSO)
AC coupling after Bass
Table 19. Testing Audio Processor (17)
MSB
D7
D6
D5
D4
D3
D2
D1
LSB
D0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
x
x
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
x
x
x
x
x
x
x
x
FUNCTION
Audio Processor Testing Mode
off
on
Test Multiplexer
Left InGain
Left InGain
Left Loudness
Left Loudness
Left Volume
Left Volume
Left Treble
Left Treble
Left Middle
SMCLK
Left Bass
VrefSCR
VGB1.26
SSCLK
Clock200
Mon
Ref5V5
BPout<1>
BPout<2>
BPout<3>
BPout<4>
BPout<5>
BPout<6>
BPout<7>
Not used
27/30
TDA7419
Figure 26. SO-28 Mechanical Data & Package Dimensions
mm
DIM.
MIN.
TYP.
A
MAX.
MIN.
TYP.
2.65
MAX.
0.1
0.3
0.004
0.012
b
0.35
0.49
0.014
0.019
b1
0.23
0.32
0.009
0.013
0.5
c1
0.020
45° (typ.)
D
17.7
18.1
0.697
0.713
E
10
10.65
0.394
0.419
e
1.27
0.050
e3
16.51
0.65
F
7.4
7.6
0.291
0.299
L
0.4
1.27
0.016
0.050
S
OUTLINE AND
MECHANICAL DATA
0.104
a1
C
28/30
inch
8 ° (max.)
SO-28
TDA7419
Table 20. Revision History
Date
Revision
Description of Changes
November 2004
1
First Issue
March 2005
2
Inserted new values in Electrical Characteristics
29/30
TDA7419
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics.
All other names are the property of their respective owners
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30/30