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TDA7417
Car radio audio processor
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 - 2nd 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 - 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 with 1dB resolution - soft-step control with programmable blend times Device summary
Order codes TDA7417 TDA7417TR
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.
Table 1.
Package TQFP32 TQFP32
Packing Tray Tape & reel
June 2007
Rev 2
1/34
www.st.com 1
Contents
TDA7417
Contents
1 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 3.2 3.3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4
Description of the audioprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 4.2 4.3 Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 AutoZero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.1 4.3.2 4.3.3 4.3.4 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Peak Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Low & high frequency boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Flat Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 4.5 4.6
SoftMute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Multistep and Softstep Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.1 4.6.2 4.6.3 4.6.4 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Center Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Quality Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 DC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.7
Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7.1 4.7.2 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Center Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.8 4.9 4.10 4.11 4.12
2/34
Highpass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Output Selector and Mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 IN/OUT control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Audioprocessor Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
TDA7417
Contents
5
I2C Bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Interface Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.1 5.1.2 5.1.3 Receive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Transmission Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Reset Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6
Serial data assign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1 Sub-address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1.1 6.1.2 6.1.3 6.1.4 6.1.5 6.1.6 6.1.7 6.1.8 6.1.9 6.1.10 Main Source Selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Volume/Mix volume/Fader LF/RF/LR/RR/SWL/SWR (2,8-14) . . . . . . . . 27 Softmute(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Treble(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Bass(5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Highpass/Bass Frequency Control(6) . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Smoother /In/Out Control(7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Fader Multistep Control(15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Testing (16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7 8
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3/34
List of tables
TDA7417
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. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Registers of all subaddresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Sub-address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Main source selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Volume/Mix volume/Fader LF/RF/LR/RR/SWL/SWR (2,8-14) . . . . . . . . . . . . . . . . . . . . . . 27 Softmute(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Treble(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Bass(5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Highpass/Bass Frequency Control(6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Smoother /In/Out Control(7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Fader Multistep Control(15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Testing (16). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4/34
TDA7417
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. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pins connection (Top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Loudness Attenuation @ fP = 400Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Loudness Center frequencies @ Attn. = 15dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Loudness Attenuation, fc=2.4kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Softmute-Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Soft Step and Multi Step timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Bass Control @ fC = 80Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Bass center Frequencies @ Gain = 14dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Bass Quality factors @ Gain = 14dB, fC = 80Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Bass normal and DC Mode @ Gain = 14dB, fc = 80Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Treble Control @ fc = 17.5kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Treble Center Frequencies @ Gain = 14dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Highpass Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Output Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 IN/OUT control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 TQFP32 Mechanical Data & Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5/34
Block diagram
TDA7417
1
Figure 1.
Block diagram
Block diagram
ACOUTL ACOUTR SWINL SWINR LRIN RRIN LFIN RFIN
MonoDif DifinG SE1L SE1R
Mono Diff Gain/Auto-Zero HPF
Mixing Volume Mono Fader Mono Fader Mono Fader Mono Fader Mix Mix
OutLF
Loudness
Softmute
Volume
Treble
SE2L SE2R
Bass
OutRF
DifinL DifinG DifinR
HPF
OutLR
OutRR
Input Multiplexer
Mono Fader Mono Fader
SW L
SW R
Balance Amp IN/OUT SW
OUT/IN L+ OUT/IN LOUT/IN R+ OUT/IN R-
Supply
Digital Control I2C-Bus
SCL SDA
6/34
GND Vref VCC
TDA7417
Pins description
2
Pins description
Figure 2. Pins connection (Top view)
OUTLF OUTSWR
25 24 23 22 21 20 19 18 17 9 10 11 12 13 14 15 16 OUTINROUTINR+ RFIN RRIN SWINR ACOUTR SE1R SE2R
OUTSWL
MonoDif
32 OUTINLOUTINL+ LFIN LRIN SWINL ACOUTIL SE1L SE2L 1 2 3 4 5 6 7 8
31
30
29
28
27
26
Cref
GNDa
QDL
QDGND
VCC
SDA
SCL
OUTRR
OUTRF
OUTLR
DifinG
QDR
D06AU1640
2.1
Table 2.
NO. 1 2 3 4 5 6 7 8 9 10 11 12 13
Pins description
Pins description
Pin Name OUTINLOUTINL+ LFIN LRIN SWINL ACOUTL SE1L SE2L CREF VCC SDA SCL GNDa Description Left- full-differential stereo input or bass differential output Left+ full-differential stereo input or bass differential output Front AC coupling left input Rear AC coupling left input SW AC coupling left input AC coupling left output Single-ended input 1 left channel Single-ended input 2 left channel Reference capacitor Supply I
2C
I/O I/O I/O I I I O I I O S I/O I S
bus data
I2C bus clock Ground
7/34
Pins description Table 2.
NO. 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
TDA7417
Pins description (continued)
Pin Name QDL QDGND QDR SE2R SE1R ACOUTR SWINR RRIN RFIN OUTINR+ OUTINROUTSWR OUTRR OUTRF DifinG MonoDif OUTLF OUTLR OUTSWL Description Pseudo differential stereo input left Pseudo differential stereo input common Pseudo differential stereo input right Single-ended input 2 right channel Single-ended input 1 right channel AC coupling right output SW AC coupling right input Rear AC coupling right input Front AC coupling right input Right+ Full-differential stereo input or Bass differential output Right- Full-differential stereo input or Bass differential output SW right output Rear right output Front right output Mono differential input common Mono differential input Front left output Rear left output SW left output I/O I I I I I O I I I I/O I/O O O O I I O O O
8/34
TDA7417
Electrical specifications
3
3.1
Electrical specifications
Thermal data
Table 3.
Symbol RThj-case
Thermal data
Description Thermal resistance junction-case Value 13 Unit C/W
3.2
Absolute maximum ratings
Table 4.
Symbol VS Tamb Tstg VESD VESD
Absolute maximum ratings
Parameter Operating supply voltage Operating ambient temperature Storage temperature range ESD protection (Human Body Model) ESD protection (Change Device Model) Value 9.5 -40 to 85 -55 to 150 2000 750 Unit V C C V V
3.3
Table 5.
Symbol SUPPLY Vs Is
Electrical characteristics
Electrical characteristics VS = 8.5V; Tamb= 25 C; RL= 10k; all gains = 0dB; f = 1kHz; unless otherwise specified
Parameter Test Condition Min. Typ. Max. Unit
Supply voltage Supply current
8 25
8.5 34
9 45
V mA
INPUT SELECTOR Rin VCL SIN GIN MIN GIN MAX GSTEP VDC Voffset Input resistance Clipping level Input separation Min. input gain Max. input gain Step resolution DC steps Remaining offset with AutoZero Adjacent gain steps GMIN to GMAX All single ended inputs THD = 1% 70 2 80 -0.5 14.5 0.5 -5 -15 100 2.3 100 0 15 1 1 4 0.5 0.5 15.5 1.5 5 15 130 k VRMS dB dB dB dB mV mV mV
9/34
Electrical specifications Table 5.
Symbol
TDA7417
Electrical characteristics (continued) VS = 8.5V; Tamb= 25 C; RL= 10k; all gains = 0dB; f = 1kHz; unless otherwise specified
Parameter Test Condition Min. Typ. Max. Unit
DIFFERENTIAL STEREO INPUTS Rin CMRR Input resistance Common mode rejection ratio Differential VCM=1 VRMS@ 1kHz VCM=1 VRMS@ 10kHz 70 46 46 100 60 60 130 k dB dB
DIFFERENTIAL MONO INPUTS Rin CMRR Input resistance Common mode rejection ratio Differential VCM =1 VRMS@ 1kHz VCM =1 VRMS@ 10kHz 40 40 40 56 60 60 72 k dB dB
MIXING CONTROL MLEVEL GMAX AMAX ASTEP Mixing ratio Max gain Max attenuation Step resolution Main / Mix Source 13 -83 0.5 -6/-6 15 -79 1 17 -75 1.5 dB dB dB dB
LOUDNESS CONTROL AMAX ASTEP fPeak Max attenuation Step resolution fP1 Peak frequency(1) fP2 fP3 VOLUME CONTROL GMAX AMAX ASTEP EA ET Max gain Max attenuation Step resolution Attenuation set error Tracking error DC steps Adjacent attenuation steps From 0dB to GMIN -3 -7 0.1 0.5 G = -15to +15dB G = -79 to -15dB 14 -83 0.5 -1 -4 15 -79 1 0 0 16 -75 1.5 1 3 2 3 7 dB dB dB dB dB dB mV mV 14 0.5 360 720 2200 15 1 400 800 2400 16 1.5 440 880 2600 dB dB Hz Hz Hz
VDC
SOFT MUTE AMUTE TD
Mute attenuation T1 Delay time T2 T3
80
100 0.48 0.96 1 2 170
dB ms ms ms
70
123
10/34
TDA7417 Table 5.
Symbol BASS CONTROL fC1 Fc Center frequency (1) fC2 fC3 fC4 Q1 QBASS Quality factor (1) Q2 Q3 Q4 CRANGE ASTEP DCGAIN Control range Step resolution Bass-DC-gain DC = off DC = on 54 72 90 180 0.9 1.1 1.3 1.8 14 0.5 -1 3.5
Electrical specifications Electrical characteristics (continued) VS = 8.5V; Tamb= 25 C; RL= 10k; all gains = 0dB; f = 1kHz; unless otherwise specified
Parameter Test Condition Min. Typ. Max. Unit
60 80 100 200 1 1.25 1.5 2 15 1 0 4.4
66 88 110 220 1.1 1.4 1.7 2.2 16 1.5 +1 5.5
Hz Hz Hz Hz
dB dB dB dB
TREBLE CONTROL CRANGE ASTEP Control range Step resolution fC1 fc Center frequency (1) fC2 fC3 fC4 HPF fHP1 fHP Highpass corner frequency
(1)
14 0.5 8 10 12 14
15 1 10 12.5 15 17.5
16 1.5 12 15 18 21
dB dB kHz kHz kHz kHz
72 108 144
80 120 160
88 132 176
Hz Hz Hz
fHP2 fHP3
SPEAKER ATTENUATORS GMAX AMAX ASTEP AMUTE EE Max gain Max attenuation Step resolution Mute attenuation Attenuation set error DC steps Adjacent attenuation steps -5 0.1 14 -83 0.5 80 15 -79 1 90 2 5 16 -75 1.5 dB dB dB dB dB mV
VDC
VCL ROUT RL CL
AUDIO OUTPUTS Clipping level Output impedance Output load resistance Output load capacitor THD = 1% 2 5 2 10 2.3 30 100 VRMS W k nF
11/34
Electrical specifications Table 5.
Symbol VDC
TDA7417
Electrical characteristics (continued) VS = 8.5V; Tamb= 25 C; RL= 10k; all gains = 0dB; f = 1kHz; unless otherwise specified
Parameter DC voltage level Test Condition Min. 4.05 Typ. 4.25 Max. 4.4 Unit V
AC COUPLING RACIN RACOUT AC coupling input resistance AC coupling output resistance 35 5 50 50 65 100 k
IN/OUT CONTROL Rin CMRR VCL(IN) VCL(OUT) ROUT RIMPED VDC I2C TIMING VIH VIL VOL Tr Tf Tsdah Tsdas GENERAL BW=20Hz to 20 kHz all gain = 0dB, HPF = off BW=20Hz to 20 kHz Output muted all gain = 0dB flat; Vo =2VRMS VIN=1VRMS; all stages 0dB HPF = off 80 95 12 6 100 0.01 90 0.1 25 15 V V dB % dB High input voltage for SDA,SCL Low input voltage for SDA,SCL Low output voltage for SDA SDA and SCL rise time SDA and SCL fall time SCL falling to SDA input hold time SDA input setup time to SCL rising 0 100 2.5 0.7 0.4 300 300 0.9 V V V ns ns us ns Input resistance Common mode rejection ratio In clipping level Out clipping level Output impedance High impedance DC voltage level 3.1 Differential VCM =1 VRMS@ 1kHz VCM =1 VRMS@ 10kHz 70 40 40 1.9 1.9 100 60 60 2 2 50 200 3.3 3.5 100 130 k dB dB VRMS VRMS k V
eNO
Output noise
S/N D SC
Signal to noise ratio Distortion Channel separation left/right
1. Min and max values are calculated according to simulation results; functionality is guaranteed by measuring a directly correlated parameter
Note:
It is not recommended that gain control and Softstep control be adjusted at the same time if they are in the same byte. It is not allowed to change multistep on/off or softstep on/off during the process of multistep or softstep.
12/34
TDA7417
Description of the audioprocessor
4
4.1
Description of the audioprocessor
Input stages
In the basic configuration, one stereo quasi-differential, one selectable full-differential and two single ended stereo inputs are available. As Figure 3 shown.
Quasi-differential stereo Input (QD)
The QD input is implemented as a buffered quasi-differential stereo stage with 100k inputimpedance at each input. The attenuation is fixed to -3.5dB in order to adapt the incoming signal level.
Single-ended stereo input (SE1, SE2)
The input-impedance at each input is 100k and the attenuation is fixed to -3.5dB for incoming signals.
Full differential stereo Input (FD)
The FD input is implemented as a selectable full-differential stereo stage with 50k inputimpedance at each input or high impedance status. The attenuation is fixed to -3.5dB in order to adapt the incoming signal level.The high impedance status is 100k Figure 3. Input stage
Quasi-differential InGain SEL1/SER1 SEL2/SER2 Full-differential Mute
4.2
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. 0.32ms for the alignment. To avoid audible clicks the Audio processor is muted before the loudness stage during this time.
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Description of the audioprocessor
TDA7417
AutoZero-Remain
In some cases, for example if the P is executing a refresh cycle of the IIC-Busprogramming, 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.
4.3
Loudness
There are four parameters programmable in the loudness stage:
4.3.1
Attenuation
Figure 4 shows the attenuation as a function of frequency at fP = 400Hz. Figure 4. Loudness Attenuation @ fP = 400Hz
4.3.2
Peak Frequency
Figure 5 shows the four possible peak-frequencies at 400, 800 and 2400Hz. Figure 5. Loudness Center frequencies @ Attn. = 15dB
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TDA7417
Description of the audioprocessor
4.3.3
Low & high frequency boost
Figure 6 shows the different Loudness shapes in low & high frequency boost. Figure 6. Loudness Attenuation, fc=2.4kHz
4.3.4
Flat Mode
In flat mode the loudness stage works as a 0dB to -15dB attenuator.
4.4
SoftMute
The digitally controlled Softmute stage allows muting/demuting the signal with a I2C-bus programmable slope. The mute process can be activated by the I2C-bus. This slope is realized in a special S-shaped curve to mute slow in the critical regions (see Figure 7). Figure 7. Softmute-Timing
SOFT MUTE
+SIGNAL
REF
-SIGNAL
AC00061
Time
Note:
Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal
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Description of the audioprocessor
TDA7417
4.5
Multistep and 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 audio signal. With the Multistep and Softstep feature both kinds of clicks could be reduced to a minimum and are no more audible. Multistep feature supports N dB change, each step is 1dB;During 1dB transition, it will have 32 divisions if choosing softstep. The blend-time from one step to the next is user selectable. Figure 8. Soft Step and Multi Step timing
Soft Step (S.S.)
1dB
32 divisions
Blend Time
Multi Step (M.S.) 1dB (2dB) Blend Time NdB
Multi Soft Step (M.S.S.)
1dB
32 divisions
Blend Time NdB
AC00062
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TDA7417
Description of the audioprocessor
4.6
Bass
There are four parameters programmable in the bass stage:
4.6.1
Attenuation
Figure 9 shows the attenuation as a function of frequency at a center frequency of 80Hz. Figure 9. Bass Control @ fC = 80Hz, Q = 1
4.6.2
Center Frequency
Figure 10 shows the eight possible center frequencies 60, 80, 100 and 200Hz. Figure 10. Bass center Frequencies @ Gain = 14dB, Q = 1
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Description of the audioprocessor
TDA7417
4.6.3
Quality Factors
Figure 11 shows the four possible quality factors 1, 1.25, 1.5 and 2. Figure 11. Bass Quality factors @ Gain = 14dB, fC = 80Hz
4.6.4
DC Mode
It is used for cut only for shelving filter. 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 12 shows DC mode. Figure 12. Bass normal and DC Mode @ Gain = 14dB, fc = 80Hz
Note: The center frequency, Q and DC-mode can be set fully independently.
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TDA7417
Description of the audioprocessor
4.7
Treble
There are two parameters programmable in the treble stage:
4.7.1
Attenuation
Figure 13 shows the attenuation as a function of frequency at a center frequency of 17.5kHz. Figure 13. Treble Control @ fc = 17.5kHz
4.7.2
Center Frequency
Figure 14 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz. Figure 14. Treble Center Frequencies @ Gain = 14dB
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Description of the audioprocessor
TDA7417
4.8
Highpass filter
The highpass filter has 2 order filter characteristics with programmable cut-off frequency (80/120/160Hz) Figure 15. Highpass Control
4.9
Output Selector and Mixing
The output-selector allows different sources to connect to the front output. The setup of the output selector is shown in Figure 16. A Mixing-stage is placed after the front speakerattenuator and can be set to mixing-mode. In normal mode, switch (sw1) turns to down and main signal is directly outputted through front pin. In the mixing mode, switch (sw1) turns up, mono differential signal and main signal are mixed with ratio -6/-6dB. Having a full volume-attenuator for the mix-signal, the stage offers a wide flexibility to adapt the mixing levels. Figure 16. Output Selector
Mono Differential Mix_out Attenuator
-6/-6 dB
Attenuator Attenuator SW Attenuator sw 1 Rear
Main
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TDA7417
Description of the audioprocessor
4.10
IN/OUT control
IN/OUT control offers selectable full-differential stereo input or Bass output as figure15 shown. When used as full-differential input, bass buffer output is disabled, full-differential input switch sw1(sw4) closes and sw2(sw3) closes. When used as bass output, fulldifferential input switch sw1(sw4) opens and sw2(sw3) still closes, single ended bass output signal is converted to full differential output. IN/OUT control supports high impedance status when bass buffer output is disabled, full-differential input switch sw1(sw4) opens and sw2(sw3) closes. Figure 17. IN/OUT control
Enable BassOUTL 1 + D1 3.5dB
OUT/INL+
-1
+D 1 -
OUT/INL-
-3.5dB
sw1 sw2 50k 50k
50k
FDL
+ sw3 sw4 50k
AC00063
4.11
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 QDL 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. External clock can be available at the SE1R pin.
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Description of the audioprocessor
TDA7417
4.12
Test circuit
Figure 18. Test circuit
47F
47F
47F
47F
47F
47F
100nF OUTSWL OUTSL OUTLF 32 1 4.7F OUTINL2 4.7F OUTINL+ 3 470nF 470nF LFIN 4 LRIN 5 470nF SWINL 31 30
100nF
MonoDif DiffG OUTRF OUTRR OUTSWL 29 28 27 26 25 24 OUTINR23 OUTINR+ 22 RFIN 21 RRIN 20 SWINR 19 ACOUTR 470nF 470nF 470nF 4.7F
4.7F
6 ACOUTL 7 100nF 100nF SE1L 8 SE2L Cref 10F 100nF 10F 100nF 9 10 Vcc SDA 11 12 SCL 13 GNDa 14 15
18 17 16 QDR
SE1R 100nF SE2R 100nF
QDL QDGND
10F
100nF
AC00064
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TDA7417
I2C Bus specification
5
5.1
I2C Bus specification
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
5.1.1
S 1 0
Receive Mode
001 0 0 R/W ACK TS AZ AI A4 A3 A2 A1 A0 ACK DATA ACK P
S = Start R/W = "0" -> Receive Mode (Chip can be programmed by P) "1" -> Transmission Mode (Data could be received by P) ACK = Acknowledge P = Stop TS = Testing mode AZ = Auto zero remain AI = Auto increment
5.1.2
S 1 0
Transmission Mode
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 3.5V. After that the following data is written automatically into the registers of all subaddresses: Table 6.
MSB 1 1 1 1 1 1 1
Registers of all subaddresses
LSB 0
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Serial data assign
TDA7417
6
6.1
Table 7.
MSB I2 I1
Serial data assign
Sub-address
Sub-address
LSB FUNCTION I0 A4 A3 A2 A1 A0 Testing Mode off on 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 AutoZero Remain off on Auto Increment Mode Off On Main Source Selector Loudness Primary Volume Softmute/Clock Generator Treble Control Bass Control Highpass/Bass Frequency control Smoother/In/Out control Mix volume Mono Fader LF Mono Fader RF Mono Fader LR Mono Fader RR Mono Fader SWL Mono Fader SWR Fader Multistep control Test control
0 1
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TDA7417
Serial data assign
6.1.1
Table 8.
MSB D7 D6
Main Source Selector (0)
Main source selector (0)
LSB FUNCTION D5 D4 D3 D2 D1 D0 Source Selector QD SE1 SE2 FD Mute Input Gain 0dB 1dB 2.dB 3dB 4dB 5dB 6dB 7dB 8dB 9dB 10dB 11dB 12dB 13dB 14dB 15dB Auto Zero on off
0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 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
0 0 1 1 X
0 1 0 1 X
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Serial data assign
TDA7417
6.1.2
Table 9.
MSB D7 D6
Loudness (1)
Loudness (1)
LSB FUNCTION D5 D4 D3 D2 D1 D0 Attenuation 0dB -1dB -2.dB -3dB -4dB -5dB -6dB -7dB -8dB -9dB -10dB -11dB -12dB -13dB -14dB -15dB Center Frequency Flat 400Hz 800Hz 2400Hz High Boost on off Softstep on off
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 0 1 0 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
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TDA7417
Serial data assign
6.1.3
Table 10.
MSB D7 D6
Volume/Mix volume/Fader LF/RF/LR/RR/SWL/SWR (2,8-14)
Volume/Mix volume/Fader LF/RF/LR/RR/SWL/SWR (2,8-14)
LSB FUNCTION D5 D4 D3 D2 D1 D0 Gain/Attenuation 0dB 1dB 2.dB : 15dB -0dB -1dB : -78dB -79dB mute Softstep on off
0 0 0 : 0 0 0 : 1 1 1 0 1
0 0 0 : 0 0 0 : 0 0 1
0 0 0 : 0 1 1 : 1 1 x
0 0 0 : 1 0 0 : 1 1 x
0 0 0 : 1 0 0 : 1 1 x
0 0 1 : 1 0 0 : 1 1 x
0 1 0 : 1 0 1 : 0 1 x
6.1.4
Table 11.
MSB D7 D6
Softmute(3)
Softmute(3)
LSB FUNCTION D5 D4 D3 D2 D1 D0 Soft Mute on off Soft Mute Time 0.48ms 0.96ms 123ms Softstep Time 0.160ms 0.321ms 0.642ms 1.28ms 2.56ms 5.12ms 10.24ms 20.48ms Not used Not used
0 1 0 0 1 0 0 0 0 1 1 1 1 x x 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 x
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Serial data assign
TDA7417
6.1.5
Table 12.
MSB D7 D6
Treble(4)
Treble(4)
LSB FUNCTION D5 D4 0 0 : 0 0 1 1 : 1 1 0 0 1 1 0 1 0 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 -15dB -14dB : -1dB 0dB 0dB +1dB : +14dB +15dB Treble Center Frequency 10kHz 12.5kHz 15kHz 17.5kHz Volume Multistep Control on off
0 1
6.1.6
Table 13.
MSB D7 D6
Bass(5)
Bass(5)
LSB FUNCTION D5 D4 0 0 : 0 0 1 1 : 1 1 0 0 1 1 0 1 0 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 -15dB -14dB : -1dB 0dB 0dB +1dB : +14dB +15dB Bass Q Factor 1 1.25 1.5 2 Softstep Control on off
0 1
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TDA7417
Serial data assign
6.1.7
Table 14.
MSB D7 D6
Highpass/Bass Frequency Control(6)
Highpass/Bass Frequency Control(6)
LSB FUNCTION D5 D4 D3 D2 D1 0 0 1 1 0 1 0 0 1 0 0 1 0 1 x 0 1 x D0 0 1 0 1 Bass Frequency 60Hz 80Hz 100Hz 200Hz Bass DC Mode on off Front Highpass Frequency 80Hz 120Hz 160Hz Rear Highpass Frequency 80Hz 120Hz 160Hz Not used
x
6.1.8
Table 15.
MSB D7 D6
Smoother /In/Out Control(7)
Smoother /In/Out Control(7)
LSB FUNCTION D5 D4 D3 D2 D1 D0 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 x Mixing Enable on off Smoother Filter on off AC coupling on off In Out Control in out High Impedance Front Highpass Control on bypass Rear Highpass Control on bypass Not used
x
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Serial data assign
TDA7417
6.1.9
Table 16.
MSB D7 D6
Fader Multistep Control(15)
Fader Multistep Control(15)
LSB FUNCTION D5 D4 D3 D2 D1 D0 Fader LF Multistep on off Fader RF Multistep on off Fader LR Multistep on off Fader RR Multistep on off Fader SWL Multistep on off Fader SWR Multistep on off Mixing to Left Front Speaker on off Mixing to Right Front Speaker on off
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
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TDA7417
Serial data assign
6.1.10
Table 17.
MSB D7 D6
Testing (16)
Testing (16)
LSB FUNCTION D5 D4 D3 D2 D1 D0 Audio Processor Testing Mode off on Test Multiplexer Right Bass opmos2 out Right Bass Vref Left InGain Right Bass opmos21 out Left Volume Left Loudness Left Bass Left Treble REF5.5V Left Highpass out 1.95V VBG 1.26V SSCLK CLK200 SMCLK Clock Source external internal Clock Fast Mode on off Not used
0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 1 0 1 x 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
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Package information
TDA7417
7
Package information
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Figure 19. TQFP32 Mechanical Data & Package Dimensions
mm DIM. MIN. A A1 A2 B C D D1 D3 e E E1 E3 L L1 K 0.45 0.05 1.35 0.30 0.09 9.00 7.00 5.60 0.80 9.00 7.00 5.60 0.60 1.00 0.75 0.018 1.40 0.37 TYP. MAX. 1.60 0.15 1.45 0.45 0.20 0.002 0.053 0.012 0.004 0.354 0.276 0.220 0.031 0.354 0.276 0.220 0.024 0.039 0.030 0.055 0.015 MIN. TYP. MAX. 0.063 0.006 0.057 0.018 0.008 inch
OUTLINE AND MECHANICAL DATA
Weight: 0.20gr
TQFP32 (7 x 7 x 1.40mm)
0(min.), 3.5(typ.), 7(max.)
D D1 D3 A1
17 16
0.10mm .004 Seating Plane
A A2
24 25
E3
E1
B
E
32 1 8
9
B
C
e
L1 L
K
TQFP32
0060661 C
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TDA7417
Revision history
8
Revision history
Table 18.
Date 28-Feb-2007 26-Jun-2007
Document revision history
Revision 1 2 Initial release. Corrected typo errors. Changes
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TDA7417
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