TDA7417 ,Audio ProcessorElectrical characteristics . . . . . . . 94 Description of the audioprocessor . . . . 134.1 ..
TDA7418 ,3 BAND CAR AUDIO PROCESSORBlock diagram . . . . . . 62 Pin description . . . . . 72.1 Connection diagram . . ..
TDA7418 ,3 BAND CAR AUDIO PROCESSORElectrical characteristics . . . . 8Table 5. Registers of all subaddresses . . . . . . . ..
TDA7418TR ,3 BAND CAR AUDIO PROCESSORFeatures• Input multiplexer– PD/SE4: pseudo differential stereo input, programmable as single-ended ..
TDA7419 ,3 BAND CAR AUDIO PROCESSORFeatures:Input Multiplexer QD / SE: quasi-differential stereo inputs, with selectable single-ended ..
TDA7419TR ,3 BAND CAR AUDIO PROCESSORAbsolute Maximum RatingsSymbol Parameter Value UnitV Operating Supply Voltage 10.5 VsT Operating Te ..
THN5601B , NPN SiGe RF POWER TRANSISTOR
THN5601SF , NPN SiGe RF POWER TRANSISTOR
THN6501E , NPN SiGe RF TRANSISTOR
THN6501E , NPN SiGe RF TRANSISTOR
THN6501F , SiGe NPN Transistor
THN6501S , NPN SiGe RF TRANSISTOR
TDA7417
Audio Processor
September 2013 Rev 3 1/34
TDA7417Car 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 Loudnessnd 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 Bassnd 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 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)
DescriptionThe 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. Device summary
Contents TDA74172/34
Contents Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Description of the audioprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134.1 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 T est circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
TDA7417 Contents 3/34
2 C Bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235.1 Interface Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.1 Receive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.2 Transmission Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.3 Reset Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Serial data assign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246.1 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
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
List of tables TDA7417
4/34
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
TDA7417 List of figures
5/34
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pins connection (Top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 4. Loudness Attenuation @ fP = 400Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 5. Loudness Center frequencies @ Attn. = 15dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 6. Loudness Attenuation, fc=2.4kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 7. Softmute-Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 8. Soft Step and Multi Step timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 9. Bass Control @ fC = 80Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 10. Bass center Frequencies @ Gain = 14dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 11. Bass Quality factors @ Gain = 14dB, fC = 80Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 12. Bass normal and DC Mode @ Gain = 14dB, fc = 80Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 13. Treble Control @ fc = 17.5kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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
Block diagram TDA7417
1 Block diagram
Figure 1. Block diagram
TDA7417 Pins description
7/34
2 Pins description
Figure 2. Pins connection (Top view)
2.1 Pins description
Table 2. Pins description
Pins description TDA7417
8/34
Table 2. Pins description (continued)
TDA7417 Electrical specifications
9/34
3 Electrical specifications
3.1 Thermal data
3.2 Absolute maximum ratings
3.3 Electrical characteristics
Table 3. Thermal data
Table 4. Absolute maximum ratings
Table 5. Electrical characteristics
VS = 8.5V; Tamb= 25 C; RL= 10k; all gains = 0dB; f = 1kHz; unless otherwise specified
Electrical specifications TDA7417
10/34
Table 5. Electrical characteristics (continued)
VS = 8.5V; Tamb= 25 C; RL= 10k; all gains = 0dB; f = 1kHz; unless otherwise specified
TDA7417 Electrical specifications
11/34
Table 5. Electrical characteristics (continued)
VS = 8.5V; Tamb= 25 C; RL= 10k; all gains = 0dB; f = 1kHz; unless otherwise specified
Electrical specifications TDA7417
12/34
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. Min and max values are calculated according to simulation results; functionality is guaranteed by measuring a directly correlated parameter
Table 5. Electrical characteristics (continued)
VS = 8.5V; Tamb= 25 C; RL= 10k; all gains = 0dB; f = 1kHz; unless otherwise specified
TDA7417 Description of the audioprocessor
13/34 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 100k input-
impedance 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 input-
impedance 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
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.
Description of the audioprocessor TDA7417
14/34
AutoZero-Remain
In some cases, for example if the µP 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, 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
TDA7417 Description of the audioprocessor
15/34
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 I2 C-bus. This slope is
realized in a special S-shaped curve to mute slow in the critical regions (see Figure7).
Figure 7. 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
Description of the audioprocessor TDA7417
16/34
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
TDA7417 Description of the audioprocessor
17/34
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
