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

Electrical specifications TDA7417

Table 5. Electrical characteristics (continued)

V

= 8.5V; T

S

Symbol Parameter Test Condition Min. Typ. Max. Unit

= 25 C; RL= 10kΩ; all gains = 0dB; f = 1kHz; unless otherwise specified

amb

V

DC

DC voltage level 4.05 4.25 4.4 V

AC COUPLING

R

ACIN

R

ACOUT

AC coupling input resistance 35 50 65 kΩ

AC coupling output resistance 5 50 100 Ω

IN/OUT CONTROL

R

in

CMRR Common mode rejection ratio

V

CL(IN)

V

CL(OUT)

R

OUT

R

IMPED

V

DC

Input resistance Differential 70 100 130 kΩ

VCM =1 VRMS@ 1kHz 40 60 dB

=1 VRMS@ 10kHz 40 60 dB

V

CM

In clipping level 1.9 2 V

Out clipping level 1.9 2 V

Output impedance 50 100 Ω

High impedance 200 kΩ

DC voltage level 3.1 3.3 3.5 V

I2C TIMING

VIH High input voltage for SDA,SCL 2.5 V

VIL Low input voltage for SDA,SCL 0.7 V

VOL Low output voltage for SDA 0.4 V

Tr SDA and SCL rise time 300 ns

Tf SDA and SCL fall time 300 ns

Tsdah SCL falling to SDA input hold time 0 0.9 us

Tsdas SDA input setup time to SCL rising 100 ns

RMS

RMS

GENERAL

BW=20Hz to 20 kHz all

e

NO

Output noise

gain = 0dB, HPF = off

BW=20Hz to 20 kHz
Output muted

S/N Signal to noise ratio

D Distortion

S

C

1. Min and max values are calculated according to simulation results; functionality is guaranteed by measuring a directly
correlated parameter

Channel separation left/right 80 90 dB

all gain = 0dB flat;
V

=2V

o

RMS

V

IN

=1V

RMS;

all stages

HPF = off

0dB

95 100 dB

12 25 µV

615µV

0.01 0.1 %

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 Description of the audioprocessor

4.1 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 100kΩ 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 100kΩ 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 100kΩ

Figure 3. Input stage

Quasi-differential

Full-differential

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.

SEL1/SER1

InGain

SEL2/SER2

Mute

13/34

Description of the audioprocessor TDA7417

AutoZero-Remain

In some cases, for example if the µP 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 @ f

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

= 400Hz

P

14/34

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, f

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 I
realized in a special S-shaped curve to mute slow in the critical regions (see Figure 7).

=2.4kHz

c

2

C-bus. This slope is

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

15/34

Description of the audioprocessor TDA7417

2

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.)

32 divisions1dB

Blend

Time

Multi Step (M.S.)

1dB

(2dB)

NdB

Blend

Time

Multi Soft Step (M.S.S.)

1dB 32 divisions

Blend

Time

NdB

AC0006

16/34

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 @ f

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

= 80Hz, Q = 1

C

17/34

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, f

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, f

= 80Hz

C

= 80Hz

c

Note: The center frequency, Q and DC-mode can be set fully independently.

18/34

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 @ f

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

= 17.5kHz

c

19/34

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

Main

20/34

Attenuator

Attenuator

Attenuator

Attenuator

-6/-6
dB

sw
1

Rear

SW

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

FDL

3.5dB

1

–1

-3.5dB

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.

+

D

1

-

+

D

1

-

sw1

+

-

sw2 50k

sw3

50k

sw4

50k

50k

OUT/INL+

OUT/INL-

AC00063

21/34

Description of the audioprocessor TDA7417

4.12 Test circuit

Figure 18. Test circuit

47μF 47μF 47μF 47μF 47μF 47μF

100nF 100nF

OUTSWL OUTSWLOUTSL OUTLF OUTRF OUTRRMonoDif DiffG

4.7μF

4.7μF

470nF

470nF

470nF

OUTINL-

OUTINL+

LFIN

LRIN

SWINL

2526272829303132

1

2

3

4

5

24

23

22

21

20

OUTINR-

OUTINR+

RFIN

RRIN

SWINR

4.7μF

4.7μF

470nF

470nF

470nF

100nF

100nF

ACOUTL

6

7

SE1L

8

910

SE2L

Cref

Vcc SDA SCL GNDa QDL QDRQDGND

10μF

10μF 100nF

1211 13 14 15 16

100nF

100nF10μF

19

18

17

ACOUTR

SE1R

SE2R

100nF

100nF

AC00064

22/34

TDA7417 I2C Bus specification

5 I2C Bus specification

5.1 Interface Protocol

The interface protocol comprises:

● a start condition (S)

● a chip address byte (the LSB determines read/write transmission)

● a subaddress byte

● a sequence of data (N-bytes + acknowledge)

● a stop condition (P)

● the max. clock speed is 500kbits/s

● 3.3V logic compatible

5.1.1 Receive Mode

S 1 0 0 0 1 0 0 R/W ACK TS AZ AI A4 A3 A2 A1 A0 ACK DATA ACK P

S = Start

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 Transmission Mode

S1000100R/WACKXXXXXXXSMACKP

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. Registers of all subaddresses

MSB LSB

111111 1 0

23/34

Serial data assign TDA7417

6 Serial data assign

6.1 Sub-address

Table 7. Sub-address

MSB LSB

I2 I1 I0 A4 A3 A2 A1 A0

0
1

0
1

0
1

0 0 0 0 0 Main Source Selector

0 0 0 0 1 Loudness

0 0 0 1 0 Primary Volume

0 0 0 1 1 Softmute/Clock Generator

0 0 1 0 0 Treble Control

0 0 1 0 1 Bass Control

0 0 1 1 0 Highpass/Bass Frequency control

0 0 1 1 1 Smoother/In/Out control

FUNCTION

Tes ting Mo de

off
on

AutoZero Remain

off
on

Auto Increment Mode

Off
On

0 1 0 0 0 Mix volume

0 1 0 0 1 Mono Fader LF

0 1 0 1 0 Mono Fader RF

0 1 0 1 1 Mono Fader LR

0 1 1 0 0 Mono Fader RR

0 1 1 0 1 Mono Fader SWL

0 1 1 1 0 Mono Fader SWR

0 1 1 1 1 Fader Multistep control

1 0 0 0 0 Test control

24/34

TDA7417 Serial data assign

6.1.1 Main Source Selector (0)

Table 8. Main source selector (0)

MSB LSB

D7 D6 D5 D4 D3 D2 D1 D0

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
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

Source Selector

0

QD

1

SE1

0

SE2

1

FD

X

Mute

Input Gain

0dB
1dB

2.dB
3dB
4dB
5dB
6dB
7dB
8dB
9dB
10dB
11dB
12dB
13dB
14dB
15dB

FUNCTION

Auto Zero

0
1

on
off

25/34

Serial data assign TDA7417

6.1.2 Loudness (1)

Table 9. Loudness (1)

MSB LSB

D7 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
1
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

Attenuation

0

0dB

1

-1dB

0

-2.dB

1

-3dB

0

-4dB

1

-5dB

0

-6dB

1

-7dB

0

-8dB

1

-9dB

0

-10dB

1

-11dB

0

-12dB

1

-13dB

0

-14dB

1

-15dB

Center Frequency

Flat
400Hz
800Hz
2400Hz

High Boost

on
off

FUNCTION

0
1

26/34

Softstep

on
off

TDA7417 Serial data assign

6.1.3 Volume/Mix volume/Fader LF/RF/LR/RR/SWL/SWR (2,8-14)

Table 10. Volume/Mix volume/Fader LF/RF/LR/RR/SWL/SWR (2,8-14)

MSB LSB

D7 D6 D5 D4 D3 D2 D1 D0

Gain/Attenuation

0
0
0

0
0
0

1
1
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

0dB

0

1

1dB

1

0

2.dB

:

:

:

:

:

1

1

15dB

0

0

-0dB

0

1

-1dB

:

:

:

1

0

-78dB

1

1

-79dB

x

x

mute

Softstep

0
1

on
off

6.1.4 Softmute(3)

FUNCTION

Table 11. Softmute(3)

MSB LSB

D7 D6 D5 D4 D3 D2 D1 D0

Soft Mute

0

on

1

off

Soft Mute Time

0
0
1

0
1
x

0.48ms

0.96ms
123ms

Softstep Time

0
0
0
0
1
1
1
1

0
0
1
1
0
0
1
1

0
1
0
1
0
1
0
1

0.160ms

0.321ms

0.642ms

1.28ms

2.56ms

5.12ms

10.24ms

20.48ms

x Not used

x Not used

FUNCTION

27/34

Serial data assign TDA7417

6.1.5 Treble(4)

Table 12. Treble(4)

MSB LSB

D7 D6 D5 D4 D3 D2 D1 D0

0
1

FUNCTION

Gain/Attenuation

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

-15dB

1

0

-14dB

:

:

:

:

:

0

1

-1dB

0

0

0dB

0

0

0dB

0

1

+1dB

:

:

:

1

0

+14dB

1

1

+15dB

Treble Center Frequency

0
0
1
1

0
1
0
1

10kHz

12.5kHz
15kHz

17.5kHz

Volume Multistep Control

on
off

6.1.6 Bass(5)

Table 13. Bass(5)

MSB LSB

D7 D6 D5 D4 D3 D2 D1 D0

0
1

0
0

:
0
0
1
1

:
1
1

0
0
1
1

0
1
0
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

Gain/Attenuation

1

-15dB

0

-14dB

:

:

1

-1dB

0

0dB

0

0dB

1

+1dB

:

:

0

+14dB

1

+15dB

Bass Q Factor

1

1.25

1.5
2

Softstep Control

on
off

FUNCTION

28/34

TDA7417 Serial data assign

6.1.7 Highpass/Bass Frequency Control(6)

Table 14. Highpass/Bass Frequency Control(6)

MSB LSB

D7 D6 D5 D4 D3 D2 D1 D0

x Not used

FUNCTION

Bass Frequency

0

0

60Hz

0

1

80Hz

1

0

100Hz

1

1

200Hz

Bass DC Mode

0
1

on
off

Front Highpass Frequency

0
0
1

0
1
x

80Hz
120Hz
160Hz

Rear Highpass Frequency

0
0
1

0
1

x

80Hz
120Hz
160Hz

6.1.8 Smoother /In/Out Control(7)

Table 15. Smoother /In/Out Control(7)

MSB LSB

D7 D6 D5 D4 D3 D2 D1 D0

x Not used

Mixing Enable

0

on

1

off

Smoother Filter

0
1

on
off

AC coupling

0
1

on
off

In Out Control

0
0
1

0
1
x

in
out
High Impedance

Front Highpass Control

0
1

on
bypass

Rear Highpass Control

0
1

on
bypass

FUNCTION

29/34

Serial data assign TDA7417

6.1.9 Fader Multistep Control(15)

Table 16. Fader Multistep Control(15)

MSB LSB

D7 D6 D5 D4 D3 D2 D1 D0

0
1

0
1

0
1

0
1

0
1

0
1

Fader LF Multistep

0

on

1

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

FUNCTION

0
1

30/34

Mixing to Right Front Speaker

on
off

TDA7417 Serial data assign

6.1.10 Testing (16)

Table 17. Testing (16)

MSB LSB

D7 D6 D5 D4 D3 D2 D1 D0

0
0
0
0
0
0
0
0
1
1
1
1
1
1
1

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

0
1

FUNCTION

Audio Processor Testing Mode

0

off

1

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

0
1

on
off

x Not used

31/34

Package information TDA7417

7 Package information

In order to meet environmental requirements, ST offers these devices in ECOPACK®
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

DIM.

A 1.60 0.063

A1 0.05 0.15 0.002 0.006

A2 1.35 1.40 1.45 0.053 0.055 0.057

B 0.30 0.37 0.45 0.012 0.015 0.018

C 0 .09 0.20 0.004 0.008

D 9.00 0.354

D1 7.0 0 0 .276

D3 5.6 0 0 .220

e 0.80 0.031

E 9.00 0.354

E1 7.00 0.276

E3 5.60 0.220

L 0.45 0.60 0.75 0.018 0.024 0.030

L1 1.00 0.039

K 0˚(min.), 3.5°(typ.), 7°(max.)

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

D

D1

OUTLINE AND

MECHANICAL DATA

Weight: 0.20gr

TQFP32 (7 x 7 x 1.40mm)

A1

A

A2

1724

25

B

32

1

e

16

9

8

TQFP32

32/34

E3D3E1

0.10mm

.004

Seating Plane

E

L1

L

K

B

C

0060661 C

TDA7417 Revision history

8 Revision history

Table 18. Document revision history

Date Revision Changes

28-Feb-2007 1 Initial release.

26-Jun-2007 2 Corrected typo errors.

33/34

TDA7417

Please Read Carefully:

Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
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