TDA7419
3 band car audio processor
Features
■
4 stereo inputs
■
Soft-step volume
■
Bass, middle, treble and loudness
■
Direct mute and soft-mute
■
Four independent speaker outputs
■
Sub woofer output
■
Soft-step speaker/subwoofer control
■
7 bands spectrum analyzer
■
Digital control:
– I2C bus interface
SO-28
Description
The TDA7419 is a high performance signal
processor specifically designed for car radio
applications. The device includes a high
performance audioprocessor with fully integrated
audio filters.
Table 1.
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.
Device summary
Order code
Package
Packing
TDA7419
SO-28
Tube
TDA7419TR
SO-28
Tape and reel
September 2013
Rev 7
1/40
www.st.com
1
Contents
TDA7419
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4
3.1
Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Description of the audio processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1
Audio processor features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2
Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3
4.2.1
Quasi-differential stereo input (QD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.2
Single-ended stereo input (SE1, SE2, SE3/AC2IN) . . . . . . . . . . . . . . . . 15
AutoZero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.1
4.4
4.5
Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4.1
Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4.2
Peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.3
Low and high frequency boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4.4
Flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Soft-mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.1
4.6
4.7
2/40
AutoZero remain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Soft-step volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.6.1
Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6.2
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.3
Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.4
DC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Middle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.7.1
Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.7.2
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.7.3
Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
TDA7419
Contents
4.8
5
Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.8.1
Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.8.2
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.9
Subwoofer filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.10
Spectrum analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.11
AC coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.12
HPF applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.13
Output selector and mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.14
Audioprocessor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.15
Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
I2C bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1
Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1.1
Receive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1.2
Transmission mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1.3
Reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2
Subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.3
Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3/40
List of tables
TDA7419
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
4/40
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Subaddress (receive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Main selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Main loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Soft-mute / clock generator (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Volume / speaker / mixing / subwoofer attenuation (3, 10-15) . . . . . . . . . . . . . . . . . . . . . . 32
Treble filter (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Middle filter (5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Bass filter (6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Second source selector (7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Subwoofer /middle / bass (8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Mixing / gain effect (9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Spectrum analyzer / clock source / AC mode (16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Testing audio processor (17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
TDA7419
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Loudness attenuation @ fP = 400 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Loudness center frequencies @ Attn. = 15 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Loudness attenuation, fC = 2.4 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Soft-mute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Soft-step timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Bass control @ fC = 80 Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Bass center frequencies @ gain = 15 dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Bass quality factors @ gain = 14 dB, fC = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Bass normal and DC mode @ gain = 14 dB, fC = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Middle control @ fC = 1 kHz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Middle center frequencies @ gain = 14 dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Middle quality factors @ gain = 14 dB, fc = 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Treble control @ fC = 17.5 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Treble center frequencies @ gain = 15 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Subwoofer control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Spectrum analyzer block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Timing of the spectrum analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Diagram of AC coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
HPF diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Output selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SO-28 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5/40
6/40
SE2R
SE2L
VDD
GND
SUPPLY
CREF
VREFOUTF
InGain
DIGITAL CONTROL
Treble
SDA
I2C BUS
SCL
Softstep
Volume
Middle
AC2INL/
SE3L
Bass
Subwoofer
LPF
AC2INR/
SE3R
ACINL/
FILOL
Softstep
MonoFader
Softstep
MonoFader
Softstep
MonoFader
Softstep
MonoFader
Softstep
MonoFader
Softstep
MonoFader
ACINR/
FILOR
HPF
HPF
Mix
Mix
MIX/
OUTSW/
OUTRR2
OUTSW/
OUTLR2
OUTRR
OUTLR
OUTRF
OUTLF
Block diagram
MULTIPLEXER
INPUT
SoftMute
ACOUTR/
AC2OUTR
Figure 1.
SE1L
Loudness
ACOUTL/
AC2OUTL
Block diagram
SE1R
InGain
AutoZero
MUTE
1
DIFFR
DIFFG
DIFFL
SACLK
Spectrum
Analyzer
SAOUT
Block diagram
TDA7419
TDA7419
2
Pin description
Pin description
Figure 2.
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
SE1L
9
20
OUTLF
SE1R
10
19
OUTLR
DIFFL
11
18
OUTRR
DIFFG
12
17
OUTRF
DIFFR
13
16
OUTSW/OUTLR2
CREF
14
15
GND
D04AU1569
Table 2.
Pin
N#
1
Pin description
Pin name
Function
ACOUTR / AC2OUTR AC coupling right output / HPF filter AC2OUT right channel
I/O
O
2
ACINR / FILOR
AC coupling right input / HPF filter FILO right channel
I/O
3
ACINL / FILOL
AC coupling left input / HPF filter FILO left channel
I/O
4
ACOUTL / AC2OUTL AC coupling left output / HPF 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
7/40
Pin description
Table 2.
8/40
TDA7419
Pin description (continued)
Pin
N#
Pin name
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
Spectrum analyzer output
O
27
VREF
Vref output
O
28
MIX / OUTSW /
OUTRR2
Mix input / Additional subwoofer output / 2nd rear right output
I/O
Function
I/O
TDA7419
Electrical specifications
3
Electrical specifications
3.1
Supply
Table 3.
Supply
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
8.0
8.5
10
V
35
40
mA
Vs
Supply voltage
Is
Supply current
Vs = 8.5 V
30
Ripple rejection @ 1 kHz
Audioprocessor (all Filters flat)
60
SVRR
3.2
Thermal data
Table 4.
Thermal data
Symbol
Parameter
RTh j-pins Thermal resistance junction to pinsmax
3.3
dB
Value
Unit
85
°C/W
Value
Unit
10.5
V
-40 to 85
°C
-55 to +150
°C
Absolute maximum ratings
Table 5.
Absolute maximum ratings
Symbol
Parameter
Vs
Operating supply voltage
Tamb
Operating temperature range
Tstg
Storage temperature range
VESD
ESD withstand voltage
Human body model
±1750
Machine model
±150
Charged device model
±1500
V
9/40
Electrical specifications
TDA7419
3.4
Electrical characteristics
Table 6.
Electrical characteristics
VS = 8.5V; Tamb = 25°C; RL = 10k; all gains = 0 dB; f = 1 kHz; 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
All single ended inputs
70
100
130
k
All Input
1.8
2
VRMS
QD input
1.7
2
VRMS
dB
Input selector
Rin
Input resistance
VCL
Clipping level
SIN
Input separation
80
100
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
Adjacent gain steps
-5
1
5
mV
GMIN to GMAX
-20
4
20
mV
VDC
Voffset
DC steps
Remaining offset with AutoZero
0.5
mV
Differential stereo inputs
Rin
CMRR
eNo
Input resistance
Common mode rejection ratio
Output noise @ speaker outputs
Differential
70
100
VCM =1 VRMS @ 1 kHz
46
70
dB
VCM =1 VRMS @ 10 kHz
46
60
dB
12
V
-6/-6
dB
20 Hz to 20 kHz, flat;
all stages 0 dB
130
K
MIxing control
MLEVEL
Mixing ratio
Main / mix source
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
fP1
360
400
440
Hz
fP2
720
800
880
Hz
fP3
2200
2400
2600
Hz
fPeak
10/40
Peak frequency
TDA7419
Table 6.
Electrical specifications
Electrical characteristics (continued)
VS = 8.5V; Tamb = 25°C; RL = 10k; all gains = 0 dB; f = 1 kHz; unless otherwise specified
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
Volume control
GMAX
Max gain
13
15
17
dB
AMAX
Max attenuation
-83
-79
-75
dB
ASTEP
Step resolution
0.5
1
1.5
dB
G = -20 to +20 dB
-0.75
0
+0.75
dB
G = -79 to -20 dB
-4
0
3
dB
2
dB
EA
Attenuation set error
ET
Tracking error
VDC
DC steps
Adjacent attenuation steps
-3
0.1
3
mV
From 0dB to GMIN
-5
0.5
5
mV
80
100
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
70
Low threshold for SM pin
VTH High High threshold for SM pin
RPU
Internal pull-up resistor
VPU
Internal pull-up voltage
dB
2.5
32
V
45
58
3.3
k
V
Bass control
Fc
QBASS
Center frequency
Quality factor
fC1
54
60
66
Hz
fC2
72
80
88
Hz
fC3
90
100
110
Hz
fC4
180
200
220
Hz
Q1
0.9
1
1.1
Q2
1.1
1.25
1.4
Q3
1.3
1.5
1.7
Q4
1.8
2
2.2
14
±15
±16
dB
0.5
1
1.5
dB
-1
0
+1
dB
CRANGE Control range
ASTEP
Step resolution
DCGAIN
Bass-DC-gain
DC = off
DC = on (shelving filter, use for
cut only)
-4.4
dB
11/40
Electrical specifications
Table 6.
TDA7419
Electrical characteristics (continued)
VS = 8.5V; Tamb = 25°C; RL = 10k; all gains = 0 dB; f = 1 kHz; unless otherwise specified
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
14
±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
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
Middle control
CRANGE Control range
ASTEP
fc
QBASS
Step resolution
Center frequency
Quality factor
Treble control
CRANGE Clipping level
ASTEP
fc
Step resolution
Center frequency
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
EE
Attenuation set error
VDC
DC steps
Adjacent attenuation steps
-5
0.1
1.8
2
dB
2
dB
5
mV
AUdio outputs
VCL
ROUT
Clipping level
Output impedance
RL
Output load resistance
CL
Output load capacitor
VDC
DC voltage level
30
d = 0.3%
VRMS
100
2
W
k
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
12/40
TDA7419
Electrical specifications
Table 6.
Electrical characteristics (continued)
VS = 8.5V; Tamb = 25°C; RL = 10k; all gains = 0 dB; f = 1 kHz; unless otherwise specified
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
1.5
dB
ASTEP
Step resolution
0.5
1
AMUTE
Mute attenuation
80
90
EE
Attenuation set error
VDC
DC steps
dB
2
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
3.3
V
Spectrum analyzer control
VSAOut
Output voltage range
0
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
Q1
1.62
1.8
1.98
Q2
3.15
3.5
3.85
fSAClk
Clock frequency
3
100
tSadel
Analog output delay time
2
s
trepeat
Spectrum analyzer repeat time
50
ms
tintres
Internal reset time
4.5
kHz
ms
General
eNO
S/N
Output noise
BW = 20 Hz to 20 kHz
all gain = 0dB
12
20
V
BW = 20 Hz to 20 kHz output
muted
6
15
V
Signal to noise ratio
all gain = 0 dB flat; Vo = 2 VRMS
100
D
Distortion
VIN = 1 VRMS; all stages 0 dB
0.01
SC
Channel separation left/right
80
90
dB
0.1
%
dB
13/40
Description of the audio processor
4
Description of the audio processor
4.1
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 / HPF filter input
–
In-Gain 0 to 15dB, 1dB steps
–
internal offset-cancellation (AutoZero)
–
separate second source-selector
Mixing stage
–
●
●
●
●
●
●
14/40
TDA7419
mixable to front speaker-outputs
Loudness
–
2nd order frequency response
–
programmable center frequency (400Hz/800Hz/2400Hz)
–
15 dB with 1 dB steps
–
selectable low and high frequency boost
–
selectable flat-mode (constant attenuation)
Volume
–
+15 dB to -79 dB with 1 dB step resolution
–
soft-step control with programmable blend times
Bass
–
2nd order frequency response
–
center frequency programmable in 4 steps (60 Hz/80 Hz/100 Hz/200 Hz)
–
Q programmable 1.0/1.25/1.5/2.0
–
DC gain programmable
–
-15 to 15 dB range with 1 dB 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
TDA7419
Description of the audio processor
●
●
●
●
–
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 Soft-mute with 3 programmable mutetimes(0.48ms/0.96ms/123ms)
Effect
–
4.2
gain effect, or high pass effect with fixed external components
Input stages
In the basic configuration, one stereo quasi-differential and three (two in case of HPS
applications) single ended stereo inputs are available.
4.2.1
Quasi-differential stereo input (QD)
The QD input is implemented as a buffered quasi-differential stereo stage with 100 k inputimpedance at each input. The attenuation is fixed to -3 dB in order to adapt the incoming
signal level.
4.2.2
Single-ended stereo input (SE1, SE2, SE3/AC2IN)
The input impedance at each input is 100 k 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 HPS applications (AC2IN)
15/40
Description of the audio processor
Figure 3.
TDA7419
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
4.3
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.
4.3.1
AutoZero remain
In some cases, for example if the µP is executing a refresh cycle of the I2C 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.
4.4
Loudness
There are four parameters programmable in the loudness stage:
4.4.1
Attenuation
Figure 4 shows the attenuation as a function of frequency at fP = 400 Hz
16/40
TDA7419
Description of the audio processor
Figure 4.
Loudness attenuation @ fP = 400 Hz.
5
0
-5
-10
-15
-20
10
4.4.2
100
10K
1K
Peak frequency
Figure 5 shows the three possible peak frequencies 400 Hz, 800 Hz and 2.4 kHz.
Figure 5.
Loudness center frequencies @ Attn. = 15 dB
5
0
-5
-10
-15
-20
10
100
1K
10K
17/40
Description of the audio processor
4.4.3
TDA7419
Low and high frequency boost
Figure 6 shows the different loudness shapes in low and high frequency boost.
Figure 6.
Loudness attenuation, fC = 2.4 kHz
5
0
-5
-10
-15
-20
10
4.4.4
100
1K
10K
Flat mode
In flat mode the loudness stage works as a 0 dB to -15 dB attenuator.
4.5
Soft-mute
The digitally controlled soft-mute stage allows muting/demuting the signal with a I2C bus
programmable slope. The mute process can either be activated by the soft-mute 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 7).
For timing purposes the bit 0 of the I2C bus output register is set to 1 from the start of muting
until the end of demuting.
18/40
TDA7419
Description of the audio processor
Figure 7.
Soft-mute timing
EXT.
MUTE
1
+SIGNAL
REF
-SIGNAL
1
I2C BUS
OUT
Time
D97AU634
1. Please notice that a started mute-action is always terminated and could not be interrupted by a change of
the mute -signal
4.5.1
Soft-step 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 soft-step 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 8.
Soft-step timing
VOUT
1dB
0.5dB
Time
SS Time
-0.5dB
-1dB
D00AU1170
1. For steps more than 0.5dB the Soft-step mode should be deactivated because it could generate a hard
1dB step during the blend-time.
4.6
Bass
There are four parameters programmable in the bass stage:
19/40
Description of the audio processor
4.6.1
TDA7419
Attenuation
Figure 9 shows the attenuation as a function of frequency at a center frequency of 80 Hz.
Figure 9.
Bass control @ fC = 80 Hz, Q = 1
15.0
10.0
5.0
dB
0.0
-5.0
-10.0
-15.0
10.0
20/40
100.0
Hz
1.0K
10.0K
TDA7419
4.6.2
Description of the audio processor
Center frequency
Figure 10 shows the four possible center frequencies 60, 80, 100 and 200 Hz.
Figure 10. Bass center frequencies @ gain = 15 dB, Q = 1
16
12
8
4
0
-4
10
4.6.3
100
1K
10K
Quality factors
Figure 11 shows the four possible quality factors 1, 1.25, 1.5 and 2.
Figure 11. Bass quality factors @ gain = 14 dB, fC = 80 Hz
15.0
12.5
10.0
7.5
5.0
2.5
0.0
10.0
100.0
1.0K
10.0K
21/40
Description of the audio processor
4.6.4
TDA7419
DC mode
It is used for cut only for shelving filter. In this mode the DC gain is increased by 4.4 dB. In
addition the programmed center frequency and quality factor is decreased by 25 % which
can be used to reach alternative center frequencies or quality factors.
Figure 12. Bass normal and DC mode @ gain = 14 dB, fC = 80 Hz
15.0
12.5
10.0
7.5
5.0
2.5
0.0
10.0
100.0
1.0K
10.0K
1. The center frequency, Q and DC-mode can be set fully independently.
4.7
Middle
There are three parameters programmable in the middle stage:
4.7.1
Attenuation
Figure 13 shows the attenuation as a function of frequency at a center frequency of 1 kHz.
Figure 13. Middle control @ fC = 1 kHz, Q = 1
22/40
TDA7419
4.7.2
Description of the audio processor
Center frequency
Figure 14 shows the four possible center frequencies 500 Hz, 1 kHz, 1.5 kHz and 2.5 kHz.
Figure 14. Middle center frequencies @ gain = 14 dB, Q = 1
4.7.3
Quality factors
Figure 15 shows the four possible quality factors 0.5, 0.75, 1 and 1.25.
Figure 15. Middle quality factors @ gain = 14 dB, fc = 1 kHz
23/40
Description of the audio processor
4.8
TDA7419
Treble
There are two parameters programmable in the treble stage:
4.8.1
Attenuation
Figure 16 shows the attenuation as a function of frequency at a center frequency of 17.5 kHz.
Figure 16. Treble control @ fC = 17.5 kHz
20
15
10
5
0
-5
-10
-15
-20
10
4.8.2
100
1K
10K
Center frequency
Figure 17 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5 kHz.
Figure 17. Treble center frequencies @ gain = 15 dB
20
15
10
5
0
-5
10
24/40
100
1K
10K
TDA7419
4.9
Description of the audio processor
Subwoofer filter
The subwoofer lowpass filter has butterworth characteristics with programmable cut-off
frequency (80/120/160 Hz)
Figure 18. Subwoofer control
4.10
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 19. Spectrum analyzer block diagram
25/40
Description of the audio processor
TDA7419
Figure 20. Timing of the spectrum analyzer
4.11
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 speaker-attenuator is available at the AC outputs.
The input-impedance of this AC inputs is 50 k.
Figure 21. Diagram of AC coupling
ACOUTL
ACINL
ACOUTR
ACINR
From Input MUX
InGain
26/40
Filters
Speakers
To Output
TDA7419
4.12
Description of the audio processor
HPF applications
For HPF applications, HPF filter is available for additional processing after the speaker
control. It is a 2nd order butterworth highpass filter with selectable flat mode. Figure 22
shows the diagram of the HPF that includes an external RC network.
Figure 22. HPF diagram
External RC network
ACOUT
/AC2OUT
SE3IN
/AC2IN
ACIN
/FILO
Gain Control
From speaker
4.13
To
output
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 23. Output selector
Mix_in
Attenuator
Front
Main
Attenuator
Rear
Second
Attenuator
BassL+BassR
Subwoofer
filter
Attenuator
Subwoofer
output
27/40
Description of the audio processor
4.14
TDA7419
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.
4.15
Test circuit
Figure 24. Test circuit
28/40
I2C bus specification
TDA7419
5
I2C bus specification
5.1
Interface protocol
The interface protocol comprises:
5.1.1
●
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 500 kbits/s
●
3.3 V logic compatible
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 P)
"1" -> Transmission Mode (Data could be received by P)
ACK = Acknowledge
P = Stop
R/W =
TS = Testing mode
AZ = AutoZero remain
AI = Auto increment
5.1.2
Transmission mode
S
1
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.
5.1.3
Reset condition
A Power on reset is invoked if the supply voltage is below than 3.5 V. After that the following
data is written automatically into the registers of all subaddresses:
MSB
1
LSB
1
1
1
1
1
1
0
29/40
I2C bus specification
TDA7419
5.2
Subaddress (receive mode)
Table 7.
Subaddress (receive mode
MSB
LSB
Function
I2
I1
I0
A4
A3
A2
A1
A0
Testing mode
Off
On
0
1
AutoZero remain
Off
On
0
1
Auto increment mode
Off
On
0
1
30/40
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
I2C bus specification
TDA7419
5.3
Data byte specification
Table 8.
Main selector (0)
MSB
LSB
Function
D7
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
Source selector
QD/SE: QD
SE1
SE2
SE3
QD/SE: SE
mute
mute
Input gain
0 dB
1 dB
:
14 dB
15 dB
0
1
:
0
1
AutoZero
on
off
0
1
Table 9.
Main loudness (1)
MSB
LSB
Function
D7
D6
D5
0
0
1
1
0
1
0
1
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
Attenuation
0 dB
-1 dB
:
-14 dB
-1 5dB
Center frequency
Flat
400 Hz
800 Hz
2400 Hz
High boost
on
off
Loudness soft-step
on
off
31/40
I2C bus specification
Table 10.
TDA7419
Soft-mute / clock generator (2)
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
1
Pin influence for mute
Pin and IIC
IIC
0
1
0
0
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
Soft-mute
on
off
Soft-mute time
0.48 ms
0.96 ms
123 ms
0
1
x
Soft-step time
0.160 ms
0.321 ms
0. 642 ms
1.2 8ms
2.56 ms
5.12 ms
10.24 ms
20.48 ms
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
LSB
Function
D7
D6
0
0
:
0
0
0
:
1
1
1
0
1
32/40
D5
0
0
:
0
0
0
:
0
0
1
D4
0
0
:
0
1
1
:
1
1
x
D3
0
0
:
1
0
0
:
1
1
x
D2
0
0
:
1
0
0
:
1
1
x
D1
0
0
:
1
0
0
:
1
1
x
D0
0
1
:
1
0
1
:
0
1
x
Gain/attenuation
+0 dB
+1 dB
:
+15 dB
-0 dB
-1 dB
:
-78 dB
-79 dB
mute
Soft-step
on
off
I2C bus specification
TDA7419
Table 12.
Treble filter (4)
MSB
LSB
Function
D7
D6
D5
D4
0
0
:
0
0
1
1
:
1
1
0
0
1
1
D3
1
1
:
0
0
0
0
:
1
1
D2
1
1
:
0
0
0
0
:
1
1
D1
1
1
:
0
0
0
0
:
1
1
D0
1
0
:
1
0
0
1
:
0
1
Gain/attenuation
-15 dB
-14 dB
:
-1 dB
0 dB
0 dB
+1 dB
:
+14 dB
+15 dB
Treble center frequency
10.0 kHz
12.5 kHz
15.0 kHz
17.5 kHz
0
1
0
1
Reference output select
External Vref (4 V)
Internal Vref (3.3 V)
0
1
Table 13.
Middle filter (5)
MSB
LSB
Function
D7
D6
0
0
1
1
0
1
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
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
33/40
I2C bus specification
Table 14.
TDA7419
Bass filter (6)
MSB
LSB
Function
D7
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
Gain/attenuation
-15 dB
-14 dB
:
-1 dB
0 dB
0 dB
+1 dB
:
+14 dB
+15 dB
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
LSB
Function
D7
D6
0
0
:
1
1
0
1
34/40
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
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
I2C bus specification
TDA7419
Table 16.
Subwoofer /middle / bass (8)
MSB
LSB
Function
D7
D6
D5
D4
D3
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
D2
0
1
0
1
D1
D0
0
0
1
1
0
1
0
1
Subwoofer cut-off frequency
flat
80 Hz
120 Hz
160 Hz
Middle center frequency
500 Hz
1000 Hz
1500 Hz
2500 Hz
Bass center frequency
60 Hz
80 Hz
100 Hz
200 Hz
Bass DC mode
on
off
Smoothing filter
on
off (bypass)
35/40
I2C bus specification
Table 17.
TDA7419
Mixing / gain effect (9)
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
1
Mixing to right front speaker
on
off
0
1
Mixing enable
on
off
0
1
Subwoofer enable (OUTLR2 & OUTRR2)
on
off
0
1
0
0
:
1
1
1
1
Table 18.
0
0
:
0
0
0
1
0
0
:
0
0
1
x
Mixing to left front speaker
on
off
Gain effect for HPF filter
4 dB
6 dB
:
20 dB
22 dB
0 dB
0 dB
0
1
:
0
1
x
x
Spectrum analyzer / clock source / AC mode (16)
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
1
0
1
0
1
0
1
0
1
36/40
Spectrum analyzer filter Q factor
3.5
1.75
Reset mode
IIC
Auto
Spectrum analyzer source
Bass
In gain
Spectrum analyzer run
on
off
Reset
on
off
I2C bus specification
TDA7419
Table 18.
Spectrum analyzer / clock source / AC mode (16) (continued)
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
Clock source
internal
external
0
1
0
0
1
1
Coupling mode
DC Coupling (without HPF)
AC coupling after In gain
DC Coupling (with HPF)
AC coupling after Bass
0
1
0
1
Table 19.
Testing audio processor (17)
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
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
Audio processor testing mode
off
on
Test multiplexer
Left In gain
Left In gain
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
BPout
BPout
BPout
BPout
BPout
BPout
Not used
37/40
Package information
6
TDA7419
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 25. SO-28 mechanical data and 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
38/40
inch
8 ° (max.)
SO-28
TDA7419
7
Revision history
Revision history
Table 20.
Document revision history
Date
Revision
Changes
20-Nov-2004
1
Initial release.
16-Mar-2005
2
Inserted new values in electrical characteristics table.
10-Jun-2005
3
Modified the figure 2 block diagram.
08-Oct-2005
4
Minor correction
13-Dec-2005
5
Updated “Absolute maximum ratings” table 3 and “Supply” table 2.
13-Feb-2009
6
Document reformatted.
Updated Section 6: Package information on page 38.
24-Sep-2013
7
Updated disclaimer.
39/40
TDA7419
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right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
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40/40
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