ST TDA7417 User Manual
Features
■ Input Multiplexer
– QD: quasi-differential stereo inputs
– FD: full-differential stereo inputs
– Mono: Mono input
– SE1: stereo single-ended input
– SE2: stereo single-ended input
– In-Gain 0 to 15dB, 1dB step
– internal offset-cancellation (AutoZero)
■ IN/OUT control
– Selectable full-differential stereo inputs or
Bass output
■ Loudness
nd
–2
order frequency response
– programmable center frequency
(400Hz/800Hz/2400Hz)
– 15dB with 1dB steps
– soft-step control with programmable blend
times
– selectable low & high frequency boost
■ Volume
– +15dB to -79dB with 1dB step resolution
– soft-step control with programmable blend
times
– multi-step control
■ Bass
Table 1. Device summary
nd
–2
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 with 1dB resolution
– soft-step control with programmable blend
times
Order codes Package Packing
TDA7417 TQFP32 Tray
TDA7417TR TQFP32 Tape & reel
TDA7417
Car radio audio processor
TQFP32
■ Treble
– 2nd order frequency response
– center frequency programmable in 4 steps
(10KHz/12.5KHz/15KHz/17.5KHz)
– -15 to 15dB with 1dB resolution
■ High pass
– 2nd order frequency response
– center frequency programmable in 3 steps
(80Hz/120Hz/160Hz)
■ Speaker
– independent soft step speaker controls,
+15dB to -79dB with 1dB steps
– Independent programmable mix input with
50% mixing ratio for front speakers
–direct mute
– multi-step control
■ Mute Functions
– digitally controlled SoftMute with 3
programmable mute-times
(0.48ms/0.96ms/123ms)
Description
The TDA7417 is an high performance signal
processor specifically designed for car radio
applications with fully integrated audio filters.
The digital control allows a full programming of
the audioprocessor in a wide range of filter
characteristics.
By using BICMOS-process low distortion and low
noise are obtained.
June 2007 Rev 2 1/34
www.st.com
1
Contents TDA7417
Contents
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Description of the audioprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 AutoZero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.2 Peak Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.3 Low & high frequency boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.4 Flat Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 SoftMute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5 Multistep and Softstep Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.6 Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.2 Center Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.3 Quality Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.6.4 DC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.7 Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7.2 Center Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.8 Highpass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.9 Output Selector and Mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.10 IN/OUT control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.11 Audioprocessor Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.12 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2/34
TDA7417 Contents
5I
2
C Bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Interface Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.1 Receive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.2 Transmission Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.3 Reset Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6 Serial data assign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1 Sub-address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1.1 Main Source Selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.1.2 Loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1.3 Volume/Mix volume/Fader LF/RF/LR/RR/SWL/SWR (2,8-14) . . . . . . . . 27
6.1.4 Softmute(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1.5 Treble(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1.6 Bass(5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1.7 Highpass/Bass Frequency Control(6) . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.1.8 Smoother /In/Out Control(7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.1.9 Fader Multistep Control(15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.1.10 Testing (16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3/34
List of tables TDA7417
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. Registers of all subaddresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 7. Sub-address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 8. Main source selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 9. Loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 10. Volume/Mix volume/Fader LF/RF/LR/RR/SWL/SWR (2,8-14) . . . . . . . . . . . . . . . . . . . . . . 27
Table 11. Softmute(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 12. Treble(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 13. Bass(5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 14. Highpass/Bass Frequency Control(6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 15. Smoother /In/Out Control(7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 16. Fader Multistep Control(15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 17. Testing (16). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 18. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4/34
TDA7417 List of figures
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pins connection (Top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 4. Loudness Attenuation @ f
Figure 5. Loudness Center frequencies @ Attn. = 15dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 6. Loudness Attenuation, f
Figure 7. Softmute-Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 8. Soft Step and Multi Step timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 9. Bass Control @ f
= 80Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
C
Figure 10. Bass center Frequencies @ Gain = 14dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 11. Bass Quality factors @ Gain = 14dB, f
Figure 12. Bass normal and DC Mode @ Gain = 14dB, f
Figure 13. Treble Control @ f
= 17.5kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
c
Figure 14. Treble Center Frequencies @ Gain = 14dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 15. Highpass Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 16. Output Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 17. IN/OUT control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 18. Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 19. TQFP32 Mechanical Data & Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
= 400Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
P
=2.4kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
c
= 80Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
C
= 80Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
c
5/34
Block diagram TDA7417
1 Block diagram
Figure 1. Block diagram
MonoDif
DifinG
SE1L
SE1R
SE2L
SE2R
DifinL
DifinG
DifinR
Mono
Diff
Input Multiplexer
Supply
ACOUTL
SWINL
ACOUTR
SWINR
LRIN
RRIN
RFIN
LFIN
Mixing
Volume
Mono Fader
HPFHPF
Mono Fader
Bass
Volume
Loudness
Treble
Softmute
Mono Fader
Mix
Mix
OutLF
OutRF
OutLR
Gain/Auto-Zero
Mono Fader
Mono Fader
Mono Fader
Balance
Amp
IN/OUT
SW
Digital Control I2C-Bus
OutRR
SW L
SW R
OUT/IN L+
OUT/IN L-
OUT/IN R+
OUT/IN R-
SCL
SDA
Vref
VCC
GND
6/34
TDA7417 Pins description
2 Pins description
Figure 2. Pins connection (Top view)
OUTSWL
OUTLR
323031 29 28 27 26 25
OUTLF
MonoDif
DifinG
OUTRF
OUTRR
OUTSWR
OUTINL-
OUTINL+
LFIN
LRIN
SWINL
ACOUTIL
SE1L
SE2L
1
2
3
4
5
6
7
8
910
Cref
VCC
11 12 13 14 15 16
SCL
SDA
GNDa
QDL
QDGND
QDR
24
23
22
21
20
19
18
17
D06AU1640
OUTINR-
OUTINR+
RFIN
RRIN
SWINR
ACOUTR
SE1R
SE2R
2.1 Pins description
Table 2. Pins description
NO. Pin Name Description I/O
1 OUTINL- Left- full-differential stereo input or bass differential output I/O
2 OUTINL+ Left+ full-differential stereo input or bass differential output I/O
3 LFIN Front AC coupling left input I
4 LRIN Rear AC coupling left input I
5 SWINL SW AC coupling left input I
6 ACOUTL AC coupling left output O
7 SE1L Single-ended input 1 left channel I
8 SE2L Single-ended input 2 left channel I
9 CREF Reference capacitor O
10 VCC Supply S
2
11 SDA I
12 SCL I
C bus data I/O
2
C bus clock I
13 GNDa Ground S
7/34
Pins description TDA7417
Table 2. Pins description (continued)
NO. Pin Name Description I/O
14 QDL Pseudo differential stereo input left I
15 QDGND Pseudo differential stereo input common I
16 QDR Pseudo differential stereo input right I
17 SE2R Single-ended input 2 right channel I
18 SE1R Single-ended input 1 right channel I
19 ACOUTR AC coupling right output O
20 SWINR SW AC coupling right input I
21 RRIN Rear AC coupling right input I
22 RFIN Front AC coupling right input I
23 OUTINR+ Right+ Full-differential stereo input or Bass differential output I/O
24 OUTINR- Right- Full-differential stereo input or Bass differential output I/O
25 OUTSWR SW right output O
26 OUTRR Rear right output O
27 OUTRF Front right output O
28 DifinG Mono differential input common I
29 MonoDif Mono differential input I
30 OUTLF Front left output O
31 OUTLR Rear left output O
32 OUTSWL SW left output O
8/34
TDA7417 Electrical specifications
3 Electrical specifications
3.1 Thermal data
Table 3. Thermal data
Symbol Description Value Unit
R
Thj-case
Thermal resistance junction-case 13 °C/W
3.2 Absolute maximum ratings
Table 4. Absolute maximum ratings
Symbol Parameter Value Unit
Operating supply voltage 9.5 V
Operating ambient temperature -40 to 85 °C
Storage temperature range -55 to 150 °C
ESD protection (Human Body Model) ±2000 V
ESD protection (Change Device Model) ±750 V
V
V
T
V
amb
T
S
stg
ESD
ESD
3.3 Electrical characteristics
Table 5. Electrical characteristics
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
V
= 8.5V; T
S
= 25 C; RL= 10kΩ; all gains = 0dB; f = 1kHz; unless otherwise specified
amb
V
s
I
s
Supply voltage 8 8.5 9 V
Supply current 25 34 45 mA
INPUT SELECTOR
Rin Input resistance All single ended inputs 70 100 130 kΩ
V
G
IN MIN
G
IN MAX
G
V
V
CL
S
IN
STEP
DC
offset
Clipping level THD = 1% 2 2.3 V
Input separation 80 100 dB
Min. input gain -0.5 0 0.5 dB
Max. input gain 14.5 15 15.5 dB
Step resolution 0.5 1 1.5 dB
DC steps
Adjacent gain steps -5 1 5 mV
G
MIN to GMAX
-15 4 15 mV
Remaining offset with AutoZero 0.5 mV
9/34
RMS
Electrical specifications TDA7417
Table 5. Electrical characteristics (continued)
V
= 8.5V; T
S
Symbol Parameter Test Condition Min. Typ. Max. Unit
DIFFERENTIAL STEREO INPUTS
= 25 C; RL= 10kΩ; all gains = 0dB; f = 1kHz; unless otherwise specified
amb
R
in
Input resistance Differential 70 100 130 kΩ
CMRR Common mode rejection ratio
DIFFERENTIAL MONO INPUTS
R
in
Input resistance Differential 40 56 72 kΩ
CMRR Common mode rejection ratio
MIXING CONTROL
M
G
A
A
LEVEL
MAX
MAX
STEP
Mixing ratio Main / Mix Source -6/-6 dB
Max gain 131517dB
Max attenuation -83 -79 -75 dB
Step resolution 0.5 1 1.5 dB
LOUDNESS CONTROL
A
A
f
MAX
STEP
Peak
Max attenuation 14 15 16 dB
Step resolution 0.5 1 1.5 dB
Peak frequency
(1)
VOLUME CONTROL
V
CM=1 VRMS@ 1kHz
V
CM=1 VRMS@ 10kHz
V
=1 VRMS@ 1kHz 40 60 dB
CM
=1 VRMS@ 10kHz 40 60 dB
V
CM
f
P1
f
P2
f
P3
46 60 dB
46 60 dB
360 400 440 Hz
720 800 880 Hz
2200 2400 2600 Hz
G
A
A
V
MAX
MAX
STEP
E
A
E
T
DC
Max gain 141516dB
Max attenuation -83 -79 -75 dB
Step resolution 0.5 1 1.5 dB
Attenuation set error
G = -15to +15dB -1 0 1 dB
G = -79 to -15dB -4 0 3 dB
Tracking error 2dB
DC steps
Adjacent attenuation steps -3 0.1 3 mV
From 0dB to G
SOFT MUTE
A
MUTE
Mute attenuation 80 100 dB
T1 0.48 1 ms
T
D
Delay time
T2 0.96 2 ms
T3 70 123 170 ms
10/34
MIN
-7 0.5 7 mV
TDA7417 Electrical specifications
Table 5. Electrical characteristics (continued)
V
= 8.5V; T
S
Symbol Parameter Test Condition Min. Typ. Max. Unit
BASS CONTROL
= 25 C; RL= 10kΩ; all gains = 0dB; f = 1kHz; unless otherwise specified
amb
Fc Center frequency
Q
BASS
C
RANGE
A
STEP
DC
GAIN
Quality factor
Control range ±14 ±15 ±16 dB
Step resolution 0.5 1 1.5 dB
Bass-DC-gain
TREBLE CONTROL
C
RANGE
A
STEP
f
c
Control range ±14 ±15 ±16 dB
Step resolution 0.5 1 1.5 dB
Center frequency
HPF
(1)
(1)
(1)
f
C1
f
C2
f
C3
f
C4
Q
1
1.1 1.25 1.4
Q
2
54 60 66 Hz
72 80 88 Hz
90 100 110 Hz
180 200 220 Hz
0.9 1 1.1
Q3 1.3 1.5 1.7
Q4 1.8 2 2.2
DC = off -1 0 +1 dB
DC = on 3.5 4.4 5.5 dB
f
C1
f
C2
f
C3
f
C4
81012kHz
10 12.5 15 kHz
12 15 18 kHz
14 17.5 21 kHz
f
HP
Highpass corner frequency
SPEAKER ATTENUATORS
G
A
A
STEP
A
MUTE
E
V
MAX
MAX
E
DC
Max gain 141516dB
Max attenuation -83 -79 -75 dB
Step resolution 0.5 1 1.5 dB
Mute attenuation 80 90 dB
Attenuation set error 2 dB
DC steps Adjacent attenuation steps -5 0.1 5 mV
AUDIO OUTPUTS
Clipping level THD = 1% 2 2.3 V
Output impedance 5 30 100 W
Output load resistance 2 kΩ
Output load capacitor 10 nF
R
V
OUT
R
C
CL
L
L
(1)
f
HP1
f
HP2
f
HP3
72 80 88 Hz
108 120 132 Hz
144 160 176 Hz
11/34
RMS
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