STMICROELECTRONICS TDA7404

TDA7404D
CARRADIO-SIGNAL-PROCESSOR
■
4 STEREO INPUTS
■
1 MONO INPUTS
■
SOFTSTEP-VOLUME
■
BASS, TREBLE AND LOUDNESS CONTROL
■
DIRECT MUTE AND SOFTMUTE
■
INTERNAL BEEP
■
FOUR INDEPENDENT SPEAKER-OUTPUTS
■
SUBWOOFER STEREO OUTPUT
■
DIGITAL CONTROL:
2
● I C-BUS INTERFACE
● AUDIO-FILTER CHARACTERISTICS
PROGRAMMABLE
SO28
ORDERING NUMBER: TDA7404D
DESCRIPTION
The TDA7404D is a high performance signal processor specificall designed for car radio applications.
The device includes a high performance audiopro-
cessor with fully integrated audio filters. The digital
control allows a programming in a wide range of all
the filter characteristics. By the use of a BICMOSprocess and a linear signal processing low distortion
and low noise are obtained.
ACINR
ACINL
MUTE
ACOUTR
ACOUTL
MUX
BLOCK DIAGRAM
MIX
SE2L
SE2R
SE3L
SE3R
Input Multiplexer
Bass
Treble
Soft Mute
Volume
Loudness
SE1L
SE1R
Mixing Stage
Diffgnd
DiffinR
Gain/Auto Zero
DiffinL
Mono Fader
Out LF
Mono Fader
Out RF
Mono Fader
Out LR
Mono Fader
Out RR
Mono Fader
SW L
Mono Fader
SW R
Zero Cross
Mono/Beep
Mono+
Mono -
Beep
Digital Control I2C-Bus
SCL
SDA
Supply
Gnd Vref Vcc
July 2003
1/26
TDA7404D
SUPPLY
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
7.5
9
10.5
V
Vs
Supply Voltage
Is
Supply Current
Vs = 9V
20
mA
Ripple Rejection @ 1KHz
Audioprocessor(all Filters flat)
60
dB
Value
Unit
85
°C/W
Value
Unit
10.8
V
-40 to 85
°C
-55 to +150
°C
SVRR
THERMAL DATA
Symbol
Parameter
RTh j-pins Thermal Resistance Junction-pins max
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.
PIN CONNECTION
2/26
SE1L
1
28
ACOUTL
SE1R
2
27
ACOUTR
SE2L
3
26
VDD
SE2R
4
25
SDA
SE3L
5
24
SCL
SE3R
6
23
MUTE
Mono+
7
22
MUX
Mono-
8
21
OUTLF
DiffinR
9
20
OUTLR
Difffgnd
10
19
OUTRR
DiffinL
11
18
OUTRF
ACINR
12
17
SWL
ACINL
13
16
SWR
CREF
14
15
GND
TDA7404D
FEATURES:
Input Multiplexer
1 pseudo-differential stereo input (selectable single end stereo input)
3 single-end stereo inputs
1 differential mono input
In-Gain 0..14dB, 1dB steps, 14..20dB, 2dB steps
Auto Zero
Beep
internal Beep with 3 frequencies
781Hz/1.56KHz/1.8KHz
Mixing stage
4 step-mixing-stage with mono or beep as mix-signals
Loudness
second order frequenciy response
programmable center frequency
15 x 1dB steps
selectable low & high frequency boost
selectable flat-mode (constant sttenuation)
Volume
1 dB attenuator
100dB range
soft-step control with programmable 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
+15dB x 1dB steps
Treble
2nd order frequency response
center frequency programmable in 4 steps
10KHz/12.5KHz/15KHz/17.5KHz
+15dB x 1dB steps
Speaker
4 independent speaker controls in 1dB steps
control range 50dB with mute
Zero crossing attenuate
Subwoofer
Stereo output
attenuator range 50dB
Mute Functions
direct mute
digitally controlled Soft Mute with 4 programmable mute-times
3/26
TDA7404D
ELECTRICAL CHARACTERISTICS (VS =9V; Tamb=25 ;RL=10kΩ; all gains = 0dB; f = 1kHz; unless otherwise
specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
70
100
130
kΩ
2.20
2.60
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
18
20
22
dB
GSTEP
Step Resolution
0.5
1
1.5
dB
Adjacent Gain Steps
-5
1
5
mV
GMIN to GMAX
-10
5
10
mV
VDC
Voffset
DC Steps
all single ended Inputs
Remaining offset with AutoZero
0.5
mV
P DIFFERENTIAL STEREO INPUTS
Rin
GCD
CMRR
eNO
Input Resistance
(see Figure 1)
Differential
70
100
130
kΩ
Gain
only at true differential
input
-0.75
0
0.75
dB
-5
-6
-7
dB
-11
-12
-13
dB
VCM = 1VRMS @ 1kHz
40
70
dB
VCM = 1VRMS @ 10kHz
40
60
dB
9
V
Common Mode Rejection Ratio
Output-Noise @ Speaker-Outputs 20Hz - 20kHz, flat; all stages 0 dB
DIFFERENTIAL MONO INPUT
Rin
CMRR
Input Resistance
Differential
39
56
73
kΩ
Common Mode Rejection Ratio
VCM = 1VRMS @ 1kHz
40
70
dB
VCM = 1VRMS @ 10kHz
40
60
dB
250
350
500
mV
fB1
740
781
820
Hz
fB2
1.48
1.56
1.64
kHz
fB3
1.7
1.8
1.9
kHz
BEEP CONTROL
VRMS
fB
4/26
Beep Level
Beep Frequency
TDA7404D
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
MIXING CONTROL
MLEVEL
Mixing Level
Main / Mix-Source
0/00
dB
Main / Mix-Source
-8.5/10.6
-3.5/9.6
-2.5/8.6
dB
Main / Mix-Source
-5/-5
-6/-6
-7/-7
dB
Main / Mix-Source
-11/1.5
-12/2.5
-13/3.5
dB
VOLUME CONTROL
GMAX
Max. Gain
28
30
32
dB
AMAX
Max. Attenuation
-83
-79
-75
dB
ASTEP
Step Resolution
0.5
1
1.5
dB
G = -20 to +20dB
-1
0
1
dB
G = -80 to -20dB
-4
0
3
dB
2
dB
EA
ET
VDC
Attenuation Set Error
Tracking Error
Adjacent Steps
0.1
3
mV
From 0dB to GMIN
0.5
5
mV
DC Steps
LOUDNESS CONTROL
ASTEP
Step Resolution
-0.5
1
1.5
dB
AMAX
Max. Attenuation
13
15
17
dB
fC
Center Frequency
360
400
440
Hz
720
800
880
Hz
2.3
2.41
2.5
kHz
80
100
SOFT MUTE
AMUTE
TD
Mute Attenuation
Delay Time
VTH low
Low Threshold for SM-Pin2
VTH high
High Threshold for SM - Pin
RPU
Internal pull-up resistor
VPU
Pull-Up Voltage
dB
T1
0.48
1
ms
T2
0.96
2
ms
T3
20
30.7
50
ms
T4
70
123
170
ms
1
V
2.50
70
V
100
5
130
kΩ
V
5/26
TDA7404D
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
SOFT STEP
TSW
Switch time
TSW1
0.68
ms
TSW2
1.26
ms
TSW3
2.52
ms
TSW4
5.04
ms
1) Center frequency 2.4KHz makes 1KHz bottom frequency at low & high frequency boost condition.
2) The SM-Pin is active low (Mute = 0)
BASS CONTROL
CRANGE
ASTEP
fC
QBASS
DCGAIN
Control Range
+14
+15
+16
dB
Step Resolution
0.5
1
1.5
dB
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
DC = off
-1
0
1
dB
DC = on
4
4.4
6
dB
Control Range
+14
+15
+16
dB
Step Resolution
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
-53
50
-47
dB
0.5
1
1.5
dB
80
90
Center Frequency
Quality Factor
Bass-DC-Gain
TREBLE CONTROL
CRANGE
ASTEP
fC
Center Frequency
SPEAKER ATTENUATORS
CRANGE
Control Range
ASTEP
Step Resolution
AMUTE
Output Mute Attenuation
6/26
only for attenuation up to 24dB
dB
TDA7404D
ELECTRICAL CHARACTERISTICS (continued)
Symbol
EE
Parameter
Test Conditions
Attenuation Set Error
Min.
Typ.
Max.
Unit
2
dB
0.10
5
mV
37
45
ms
-2
VDC
DC Steps
Adjacent Attenuation Steps
TZC
Zero Cross Timer
Data bit D1=1 , D2=1
Vth
Zero Cross Threshold
29
+20
mV
2.60
VRMS
FADER OUTPUTS
VCLIP
Clipping Level
RL
Output Load Resistance
CL
Output Load Capacitance
d = 0.3%
2.20
2
kΩ
10
nF
30
100
Ω
4.3
4.5
4.7
V
Control Range
-53
50
-47
dB
ASTEP
Step Resolution
0.5
1
1.5
dB
AMUTE
Output Mute Attenuation
80
90
ROUT
Output Impedance
VDC
DC Voltage Level
SUBWOOFER ATTENUATORS
CRANGE
EE
VDC
Attenuation Set Error
DC Steps
dB
2
dB
Adjacent Attenuation Steps
0.10
5
mV
15
µV
GENERAL
eNO
Output Noise
BW = 20Hz - 20kHz
all gains = 0dB single ended
inputs
10
S/N
Signal to Noise Ratio
all gains = 0dB
flat; VO = 2VRMS
106
dB
bass, treble at +12dB;
a-weighted; VO = 2.6VRMS
100
dB
d
Distortion
SC
Channel Separation left/right
ET
Total Tracking Error
VIN = 1VRMS ; all stages 0dB
internal pass only
0.005
0.1
%
VOUT = 1VRMS ; Bass & Treble =
12dB
0.05
0.1
%
80
100
dB
AV = 0 to -20dB
-1
0
1
dB
AV = -20 to -60dB
-2
0
2
dB
7/26
TDA7404D
1.0 DESCRIPTION OF FUNCTIONALITY
1.1 Input stages
Most of the input stages have remained the same as in preceding ST-Audioprocessors with exception of the
CD-inputs (see Figure 1). In the meantime there are some CD-players in the market which have a significant
high source-impedance which effects strongly the common-mode-rejection of the normal differential input stage.
The additional buffer of the TDA7404D Diff
-input avoids this drawback and offers the full common-mode-rejection even with those CD-players.
Figure 1. Input-stages
Diffin+
/(SE4)
10
0k
Diffgnd
10
0k
Mono+
Mono -
28k
28k
28k
28k
SE1
Ingain
10
0k
SE2
10
0k
SE3
10
0k
Note. It is possible that the Differential input is switched a single ended input (SE4) like SE1.. 3.
1.2 AutoZero
In order to reduce the number of pins there is no AC coupling between the In-Gain and the following stage, so
that any offset generated by or before the In-Gain-stage would be transferred or even amplified to the output.
To avoid that effect a special Offset-cancellation-stage called AutoZero is implemented. This stage is located
8/26
TDA7404D
before the Mixing-block to eliminate all offsets generated by the Input-Stages and the In-Gain (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 DATA-BYTE 0 (Input Selector/Gain) is selected and takes a time of
max. 0.3ms. To avoid audible clicks the Audioprocessor is muted before the loudness stage during this time.
1.2.1 AutoZero-Remain
In some cases, for example if the uP 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 the TDA7404D could be switched in the AutoZero-Remain-Mode (I2 bit of the
subaddress-byte). If this bit is set to high, the DATABYTE 0 could be loaded without invoking the AutoZero and
the old adjustment-value remains.
1.3 Mixing Stage
The 4 step Mixing stage offers the possibility to mix the rear selector signal or the phone signal to any other
source. Due to the fact that the mixing-stage is located behind the In-Gain-stage fine adjustments of the main
source level could be done in this way.
Figure 2. Signal-Flow of Mixing-Stage
Input Selector
Diffin
SE1
SE2
SE3
Mono
In-Gain
Mixing
25
k
Mixing Level
Input / Beep or Mono
0dB /
-3.5dB /
- 6dB /
- 12dB /
Loudness
-100dB
- 9.6dB
- 6dB
- 2.5dB
Beep
1.4 Loudness
There are four parameters programmable in the loudness stage:
1.4.1 Attenuation
Figure 3 shows the attenuation as a function of frequency at fC = 400Hz.
9/26
TDA7404D
Figure 3. Loudness Attenuation @ fC = 400Hz
-
-
1.4.2 Center Frequency
Figure 4 shows the three possible peak-frequencies 400Hz , 800Hz and 2.4kHz.
Figure 4. Loudness Center frequencies @ Attn. = 15dB
10/26
-
-
TDA7404D
1.4.3 Low & High Frequency Boost
Figure 5 shows the different Loudness-shapes in low & high frequency boost.
Figure 5. Loudness Attenuation , fC = 2.4KHz
-
-
1.5 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 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 6).
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
de-muting.
Figure 6. Softmute-Timing
Note: Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal.
11/26
TDA7404D
1.6 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. Four
programmable soft step time from one step to the next, are user selectable.
Figure 7. SoftStep-Timing
Vout
2dB
1dB
Time
SS Time
-1dB
-2dB
Note: For steps more than 1dB the SoftStep mode should be deactivated because it could generate a 1dB error during the blend-time.
1.7 Bass
There are three parameters programmable in the bass stage:
1.7.1 Attenuation
Figure 8 shows the attenuation as a function of frequency at a center frequency of 80Hz.
Figure 8. Bass Control @ fC = 80Hz, Q = 1
15.0
10.0
5.0
dB
0.0
-5.0
-10.0
-15.0
10.0
12/26
100.0
Hz
1.0K
10.0K
TDA7404D
1.7.2 Center Frequency
Figure 9 shows the four possible center frequencies 60, 80 ,100 and 200Hz.
Figure 9. Bass center Frequencies @ Gain = 15dB, Q = 1
-
-
1.7.3 Quality Factors
Figure 10 shows the four possible quality factors 1, 1.25, 1.5 and 2.
Figure 10. 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
13/26
TDA7404D
1.7.4 DC Mode
In this mode the DC-gain is increased by 4.4dB. 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 11. 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.
1.8 Treble
There are two parameters programmable in the treble stage:
1.8.1 Attenuation
Figure 12 shows the attenuation as a function of frequency at a center frequency of 17.5kHz.
Figure 12. Treble Control @ fC = 17.5kHz
14/26
-
-
TDA7404D
1.8.2 Center Frequency
Figure 13 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz.
Figure 13. Treble Center Frequencies @ Gain = 15dB
-
-
1.9 External AC - Coupling
TDA7404D has external AC - coupling terminals which can be selected one of two positions behind the Mixing
stage or Bass filter.
Figure 14. External AC - Coupling
SOUND
EFFECTS
ACOUT
ACIN
SW2
SW1
ACC selector
a
Input
b
a
Volume & Filter
Mixing
Stage
SW3
b
Speaker
SW4
15/26
TDA7404D
The External AC - Coupling is selected in position of four switches controlled by the lower 2bit in the Others
selection. (See table)
Others selection
D1
D0
Switch position
X
0
SW3 = ON , SW4 = ON (selected internal pass), SW1 = b , SW2 = open
0
1
SW3 = OFF , SW4 = ON, SW1 = a , SW2 = a
1
1
SW3 = ON , SW4 = OFF, SW1 = b , SW2 = b
1.10 Speaker Attenuator
Due to practical aspects the steps in the speaker-attenuators are not linear over the full range. At attenuations
more than 24dB the steps increase from 1.5dB to 10dB (please see data byte specification).
1.11 Subwoofer Attenuator
The Subwoofer output is a single ended stereo output. The attenuator is exactly the same like the other speakers.
2.0 I2C BUS INTERFACE
2.1 Interface Protocol
The interface protocol comprises:
■
a start condition (S)
■
a chip address byte (the LSB bit 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
SUBADDRESS
CHIP ADDRESS
MSB
S
1
LSB
0
0
0
1
0
0
R/W
DATA 1 to DATA n
MSB
ACK
LSB
I3 I2 I1 I0 A3 A2 A1 A0
MSB
ACK
LSB
ACK
ACK
P
D99AU1044
S = Start
R/W ="0" -> Receive-Mode (Chip could be programmed by P)
"1" -> Transmission-Mode (Data could be received by P)
ACK = Acknowledge
P = Stop
2.2 TRANSMITTED DATA (send mode)
MSB
X
LSB
X
X
X
X
X
X
SM
SM = Soft mute activated
X = Not Used
The transmitted data is automatic updated after each ACK. Transmission can be repeated without new chipaddress.
16/26
TDA7404D
2.3 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
LSB
1
1
1
1
1
1
1
0
The programming after POR is marked bold-face / underlined in the programming tables.
With this programming all the outputs are muted to VREF (VOUT= VDD/2).
Note : All the blank bits in the following tables are "don't care"-bits.
2.4 SUBADDRESS (receive mode)
MSB
LSB
FUNCTION
I3
I2
I1
I0
A3
A2
A1
A0
Zero cross / Soft Mute 1
Zero Cross available
Soft Mute available
0
1
AutoZero Remain 2
off
on
0
1
Testmode 3
off
on
0
1
Auto-Increment Mode 4
off
on
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
2
3
4
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Input Selector / Gain
Loudness
Volume
Treble
Bass
Speaker attenuator LF / Bass Fc select
Speaker attenuator RF
Speaker attenuator LR
Speaker attenuator RR
Subwoofer attenuator LSW
Subwoofer attenuator RSW
SoftMute / Mixing
Others selection
Testing
For more information see Soft Mute-section
For more information see AutoZero-section
For more information see Test Programming block
If this bit is set to "1", the subaddress is automatically incremented after the transmission of a data-byte.
Therefore a transmission of more than one byte without sending the new subaddress is possible.
17/26
TDA7404D
2.5 DATA BYTE SPECIFICATION
2.5.1 Input Selector / Gain
MSB
D7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
LSB
D6
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
X
X
D5
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
X
X
D4
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
X
X
D3
D2
D1
D0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
FUNCTION
Source Selector
Mono Differential
Single Ended 1
Mute
Single Ended 2
Pseudo Differential / Single Ended 4
Single Ended 3
Mute
Beep
Input Gain
0dB
1dB
2dB
3dB
4dB
5dB
6dB
7dB
8dB
9dB
10dB
11dB
12dB
13dB
14dB
16dB
18dB
20dB
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2.5.2 Loudness
MSB
D7
LSB
D6
0
0
1
0
1
D5
0
0
1
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
LOUDNESS
Attenuation
0 dB
-1 dB
:
-14 dB
-15 dB
Filter / Center Frequency
off(flat) 'D6 must be = 0'
400Hz
800Hz
2.4KHz
Shape
Low Boost
Low & High Boost
SoftStep-Volume
off
on
Note 1: The attenuation is specified at high frequencies. Around the center frequency the value is different depending on the programmed
attenuation (see Loudness-frequency-response).
18/26
TDA7404D
2.5.3 Volume
MSB
LSB
ATTENUATION
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
0
1
0
0
0
0
0
1
1
1
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1
1
1
1
1
1
0
0
1
1
1
X
1
1
X
1
1
X
1
0
1
0
1
0
1
X
Gain/Attenuation
not allow
not allow
+30.0dB
+29.0dB
:
+1.0dB
0.0dB
- 1.0dB
- 2.0dB
:
-78.0dB
-79.0dB
Mute
Diffin - mode
Single ended stereo
Differential Stereo
0
1
Note 2: It is not recommended to use a gain more than 20dB for system performance reason. In general, the max. gain should be limited by
software to the maximum value, which is needed for the system.
2.5.4 Treble Programming
MSB
LSB
BASS & TREBLE PROGRAMMING
D7
D6
D5
D4
0
1
X
X
X
X
0
0
1
1
0
1
0
1
D3
D2
D1
D0
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
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
Treble Steps
15dB
14dB
13dB
12dB
11dB
10dB
9dB
8dB
7dB
6dB
5dB
4dB
3dB
2dB
1dB
0dB
Mode
Cut
Boost
Treble Center Frequency
10KHz
12.5KHz
15KHz
17.5KHz
19/26
TDA7404D
2.5.5 Bass Programming
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
D0
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
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
Bass Steps
15dB
14dB
13dB
12dB
11dB
10dB
9dB
8dB
7dB
6dB
5dB
4dB
3dB
2dB
1dB
0dB
Mode
Cut
Boost
0
1
0
0
1
1
BASS & TREBLE PROGRAMMING
Quality Factor
1
1.25
1.5
2
0
1
0
1
DC - Mode
Off
On
0
1
Note 3: For more information please refer to section Bass description
2.5.6 Speaker Attenuator Left Front
MSB
D7
0
0
1
1
20/26
LSB
D6
0
1
0
1
D5
D4
D3
D2
D1
D0
0
0
:
0
0
0
0
0
0
0
0
0
1
0
0
:
1
1
1
1
1
1
1
1
1
X
0
0
:
0
1
1
1
1
1
1
1
1
X
0
0
:
1
0
0
0
0
1
1
1
1
X
0
0
:
1
0
0
1
1
0
0
1
1
X
0
1
:
1
0
1
0
1
0
1
0
1
X
ATTENUATION / BASS CF
Attenuation
0 dB
-1 dB
:
-23 dB
-24.5dB
-26 dB
-28 dB
-30 dB
-32 dB
-35 dB
-40 dB
-50 dB
Speaker Mute
Bass Center-Frequency
60Hz
80Hz
100Hz
200Hz
TDA7404D
2.5.7 Speaker Attenuator Right Front
MSB
LSB
ATTENUATION
D7
X
D6
D5
D4
D3
D2
D1
D0
X
0
0
:
0
0
0
0
0
0
0
0
0
1
0
0
:
1
1
1
1
1
1
1
1
1
X
0
0
:
0
1
1
1
1
1
1
1
1
X
0
0
:
1
0
0
0
0
1
1
1
1
X
0
0
:
1
0
0
1
1
0
0
1
1
X
0
1
:
1
0
1
0
1
0
1
0
1
X
Attenuation
0 dB
-1 dB
:
-23 dB
-24.5dB
-26 dB
-28 dB
-30 dB
-32 dB
-35 dB
-40 dB
-50 dB
Speaker Mute
2.5.8 Speaker Attenuator Left Rear
MSB
D7
X
LSB
D6
D5
D4
D3
D2
D1
D0
X
0
0
:
0
0
0
0
0
0
0
0
0
1
0
0
:
1
1
1
1
1
1
1
1
1
X
0
0
:
0
1
1
1
1
1
1
1
1
X
0
0
:
1
0
0
0
0
1
1
1
1
X
0
0
:
1
0
0
1
1
0
0
1
1
X
0
1
:
1
0
1
0
1
0
1
0
1
X
ATTENUATION / Soft Step Time
Attenuation
0 dB
-1 dB
:
-23 dB
-24.5dB
-26 dB
-28 dB
-30 dB
-32 dB
-35 dB
-40 dB
-50 dB
Speaker Mute
21/26
TDA7404D
2.5.9 Speaker Attenuator Right Rear
MSB
LSB
ATTENUATION
D7
X
D6
D5
D4
D3
D2
D1
D0
X
0
0
:
0
0
0
0
0
0
0
0
0
1
0
0
:
1
1
1
1
1
1
1
1
1
X
0
0
:
0
1
1
1
1
1
1
1
1
X
0
0
:
1
0
0
0
0
1
1
1
1
X
0
0
:
1
0
0
1
1
0
0
1
1
X
0
1
:
1
0
1
0
1
0
1
0
1
X
Attenuation
0 dB
-1 dB
:
-23 dB
-24.5dB
-26 dB
-28 dB
-30 dB
-32 dB
-35 dB
-40 dB
-50 dB
Speaker Mute
2.5.10 Subwoofer Attenuator (Left & Right)
MSB
LSB
FUNCTION
D7
X
22/26
D6
D5
D4
D3
D2
D1
D0
X
0
0
:
0
0
0
0
0
0
0
0
0
1
0
0
:
1
1
1
1
1
1
1
1
1
X
0
0
:
0
1
1
1
1
1
1
1
1
X
0
0
:
1
0
0
0
0
1
1
1
1
X
0
0
:
1
0
0
1
1
0
0
1
1
X
0
1
:
1
0
1
0
1
0
1
0
1
X
Attenuation
0 dB
-1 dB
:
-23 dB
-24.5dB
-26 dB
-28 dB
-30 dB
-32 dB
-35 dB
-40 dB
-50 dB
Speaker Mute
TDA7404D
2.5.11 SoftMute and Mixing
MSB
LSB
FUNCTION
D6
D7
D5
D4
D3
D2
D1
D0
0
1
0
0
1
1
Mute/Zero Cross-Times
0.48ms
0.96ms
30.7ms / 9ms
122.8ms / 37ms
0
1
0
1
Mixing-Source
Beep
Phone
0
1
0
0
1
1
0
0
1
1
Mute
enable SoftMute
disable SoftMute
Mixing-Level (Main / Mix-Source)
-12 / -2.5dB
-6 / -6dB
-3.5 / -9.6dB
0 /∞
0
1
0
1
Beep Frequency
781Hz
1.56KHz
Not allow
1.8KHz
0
1
0
1
2.5.12 Others
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
1
1
0
0
1
1
1
0
1
0
1
0
1
D1
D0
X
0
1
0
1
1
AC-Coupling
Internal pass
Coupling between Mixing Stage and Volume
Coupling between Bass filter and Speaker attenuator
Must be "1" for make up
Must be "1" for make up
Soft Step Time
0.68ms
1.26ms
2.52ms
5.04ms
Must be "1" for Auto zero
Internal Beep
Off
ON
23/26
TDA7404D
2.5.13 Testing
MSB
D7
1
LSB
D6
D5
D4
D3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D2
D1
Testing
D0
Main-Testmode
off
on
0
1
Test-Multiplexer
internal 200kHz Clock
internal Bandgap Voltage
0
1
Clock
external
internal
0
1
1
must be "1"
Figure 15. TDA7404D Application Circuit
MUTE
SOUND
EFFECTS
MUTE
ACINR
ACINL
ACOUTR
ACOUTL
OutLF
SE1L
TapeL
OutLR
SE1R
TapeR
OutLF
4.7u
100n
OutLR
4.7u
100n
OutRR
SE2L
FM_L
OutRF
SE2R
FM_R
OutRR
4.7u
100n
OutRF
4.7u
100n
100n
AM_R
SWL
AJ39
TDA7404D
SE3L
AM_L
SWL
4.7u
SWR
SE3R
SWR
4.7u
100n
MONO+
Phone
Spectrum
Analyzer
100n
MUX
MONO -
PhoneGnd
100n
DiffinL
CD_L
100n
CDGnd
DiffinGnd
VDD
DiffinR
GND
100n
SCL
SDA
100n
CREF
CD_R
100n
10u
+
10u
9V
SCL
SDA
24/26
TDA7404D
mm
DIM.
MIN.
TYP.
A
inch
MAX.
MIN.
TYP.
2.65
MAX.
0.104
a1
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
C
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
SO28
8 ° (max.)
25/26
TDA7404D
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.
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26/26