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TDA7718NSTN/a4000avai3 BAND CAR AUDIO PROCESSOR


TDA7718N ,3 BAND CAR AUDIO PROCESSORFeatures■ Input multiplexer– QD1: quasi-differential stereo inputs– SE1: stereo single-ended input– ..
TDA7719 ,3 BAND CAR AUDIO PROCESSORpin configuration . . . . 13Table 7. Selector configuration matrix . . . . . . . 14Table ..
TDA7719TR ,3 BAND CAR AUDIO PROCESSORElectrical characteristics . . . . . . . 94 Description 134.1 Input configuration . ..
TDA7801 ,Digital input (I2S), quad BTL output power amplifier with full I2C diagnosticsapplications. Selectable input sampling frequency: Thanks to the BCD6 technology it is possible to ..
TDA7850 ,Quad BTL output with HSD/offset detection, stand-by and mute inputsBlock diagram . . . . 5Figure 2. Standard test and application circuit . . . 5Figure 3. ..
TDA7850A ,Quad BTP output with HSD, offset detection , stand-by and mute inputsFeatures■ High output power capability:–4 x 50 W/4  max.–4 x 30 W/4  @ 14.4 V, 1 kHz, 10 %–4 x 80 ..
THS4500IDRG4 ,High-Speed Fully Differential Amplifier, +/-5 V 8-SOIC -40 to 85FEATURES APPLICATIONS23• Fully Differential Architecture• High Linearity Analog-to-Digital Converte ..
THS4501CD ,High-Speed Fully Differential Amplifier, +/-5 VMAXIMUM RATINGSOver operating free-air temperature range, unless otherwise noted.UNITSupply voltage ..
THS4501CDGN ,High-Speed Fully Differential Amplifier, +/-5 V SLOS350F–APRIL 2002–REVISED OCTOBER 2011(1)PACKAGE/ORDERING INFORMATIONORDERABLE PACKAGE AND NUMBE ..
THS4501ID ,High-Speed Fully Differential Amplifier, +/-5 VFEATURES APPLICATIONS23• Fully Differential Architecture• High Linearity Analog-to-Digital Converte ..
THS4501IDGK ,High-Speed Fully Differential Amplifier, +/-5 V.(2) All packages are available taped and reeled. The R suffix standard quantity is 2500. The T suf ..
THS4502CD ,High-Speed Fully-Differential AmplifiersMAXIMUM RATINGS(1)over operating free-air temperature range unless otherwise notedUNITSupply voltag ..


TDA7718N
3 BAND CAR AUDIO PROCESSOR
September 2013 Doc ID 16502 Rev 2 1/40
TDA7718N

3 band car audio processor
Features
Input multiplexer QD1: quasi-differential stereo inputs SE1: stereo single-ended input SE2: stereo single-ended input SE3: stereo single-ended input FD1 / SE4+SE5: 1 full-differential input or 2
stereo single-ended inputs Loudnessnd order frequency response Programmable center frequency
(400 Hz / 800 Hz / 2400 Hz) 15dB with 1dB steps Selectable high frequency boost Selectable flat-mode (constant attenuation) Volume +23 dB to -31 dB with 1 dB step resolution Soft-step control with programmable blend
times Bassnd order frequency response Center frequency programmable in 4 steps
(60 Hz / 80 Hz / 100 Hz / 200 Hz) Q programmable 1.0/1.25/1.5/2.0 DC gain programmable -15 dB to 15 dB range with 1 dB resolution Middlend order frequency response Center frequency programmable in 4 steps
(500 Hz / 1 kHz / 1.5 kHz / 2.5 kHz) Q programmable 0.75/1.0/1.25 -15 dB to 15 dB range with 1 dB resolution Treblend order frequency response
(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz) Center frequency programmable in 4 steps
(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz) -15 dB to 15 dB with 1 dB resolution
Contents TDA7718N
2/40 Doc ID 16502 Rev 2
Contents Block circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin connection and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Description of the audioprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.1 Quasi-differential stereo input (QD1) . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.2 Single-ended stereo input (SE1, SE2, SE3) . . . . . . . . . . . . . . . . . . . . . 13
4.1.3 Full-differential stereo input or single-ended input (FD1/QD2/SE4+SE5) 13
4.2 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.1 Loudness attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.2 Peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.3 High frequency boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.4 Flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3 SoftMute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4 SoftStep volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5 Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.1 Bass attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.2 Bass center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.3 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5.4 DC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.6 Middle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6.1 Middle attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6.2 Middle center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6.3 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.7 T reble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
TDA7718N Contents
Doc ID 16502 Rev 2 3/40
4.7.1 Treble attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.7.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.8 Subwoofer filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.9 Softstep control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.10 DC offset detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.11 Audioprocessor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252 C bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.1 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2 I2 C bus electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2.1 Receive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2.2 Transmission mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2.3 Reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.3 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
List of tables TDA7718N
4/40 Doc ID 16502 Rev 2
List of tables

Table 1. Device summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. I2 C bus electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 7. Subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 8. Main selector (0). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 9. Soft mute / others (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 10. SoftStep I (5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 11. SoftStep II / DC detector (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 12. Loudness (7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 13. Volume / output gain (8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 14. Treble filter (9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 15. Middle filter (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 16. Bass filter (11). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 17. Subwoofer / middle / bass (12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 18. Speaker attenuation (FL/FR/RL/RR/SWL/SWR) (13-18) . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 19. Testing audio processor 1 (19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 20. Testing audio processor 2 (20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 21. Testing audio processor 3 (21) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 22. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
TDA7718N List of figures
Doc ID 16502 Rev 2 5/40
List of figures

Figure 1. Block circuit diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. FD / QD / SE block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 4. Loudness attenuation @ fP = 400 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 5. Loudness center frequencies @ attn. = 15 dB.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 6. Loudness attenuation, fc = 2.4 kHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 7. SoftMute timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 8. Bass control @ fC = 80 Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 9. Bass center frequencies @ gain = 14 dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 10. Bass quality factors @ gain = 14 dB, fC = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 11. Bass normal and DC mode @ gain = 14 dB, fC = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 12. Middle control @ fC = 1 kHz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 13. Middle center frequencies @ gain = 14 dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 14. Middle quality factors @ gain = 14 dB, fC = 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 15. Treble control @ fC = 17.5 kHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 16. Treble center frequencies @ gain = 14 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 17. Subwoofer cut frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 18. DC offset detection circuit (simplified) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 19. Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 20.I2 C bus interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 21.I2 C bus data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 22. TSSOP28 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Block circuit diagram TDA7718N Block circuit diagram
Figure 1. Block circuit diagram
TDA7718N Pin connection and pin description
Doc ID 16502 Rev 2 7/40 Pin connection and pin description
2.1 Pin connection
Figure 2. Pin connection (top view)
2.2 Pin description


Table 2. Pin description
Pin connection and pin description TDA7718N
8/40 Doc ID 16502 Rev 2
Table 2. Pin description (continued)
TDA7718N Electrical specifications
Doc ID 16502 Rev 2 9/40
3 Electrical specifications
3.1 Thermal data


3.2 Absolute maximum ratings


3.3 Electrical characteristics

VS = 8.5 V; Tamb= 25 °C; RL= 10 k; all gains = 0 dB; f = 1 kHz; unless otherwise specified

Table 3. Thermal data
Table 4. Absolute maximum ratings
Table 5. Electrical characteristics
Electrical specifications TDA7718N
10/40 Doc ID 16502 Rev 2
Table 5. Electrical characteristics (continued)
TDA7718N Electrical specifications
Doc ID 16502 Rev 2 11/40
Table 5. Electrical characteristics (continued)
Electrical specifications TDA7718N
12/40 Doc ID 16502 Rev 2
Table 5. Electrical characteristics (continued)
TDA7718N Description of the audioprocessor
Doc ID 16502 Rev 2 13/40 Description of the audioprocessor
4.1 Input stages

One quasi-differential stereo input, one full-differential stereo input and maximum five
single-ended inputs are available.
4.1.1 Quasi-differential stereo input (QD1)

The QD input is implemented as a buffered quasi-differential stereo stage with 100 k input-
impedance at each input. There is -3 dB attenuation at QD input stage.
4.1.2 Single-ended stereo input (SE1, SE2, SE3)

The input-impedance at each input is 100 k and the attenuation is fixed to -3 dB for
incoming signals.
4.1.3 Full-differential stereo input or single-ended input (FD1/QD2/SE4+SE5)

This device provides a full-differential stereo input stage (FD1) or 2nd quasi-differential
stereo input stage. The full differential is a buffered full-differential stereo stage with 100 k
input-impedance at each input. When using as QD2 application, it needs to connect the two
QD2G pins together from external and the input impedance at QDG becomes 50 k. This
stage can be also configured as 2 single-ended stereo input stages (SE4 and SE5). The
configuration is done with the input selector control bits and the selection of FD1 and QD2 is
controlled by a separate bit. There is -3 dB attenuation at the input stage. Figure 3 shows
the block diagram of this input stage.
Description of the audioprocessor TDA7718N
14/40 Doc ID 16502 Rev 2
Figure 3. FD / QD / SE block diagram
TDA7718N Description of the audioprocessor
Doc ID 16502 Rev 2 15/40
4.2 Loudness

There are four parameters programmable in the loudness stage.
4.2.1 Loudness attenuation

Figure 4 shows the attenuation as a function of frequency at fP = 400 Hz.
Figure 4. Loudness attenuation @ fP = 400 Hz.
4.2.2 Peak frequency

Figure 5 shows the four possible peak-frequencies at 400, 800 and 2400 Hz.
Figure 5. Loudness center frequencies @ attn. = 15 dB.
Description of the audioprocessor TDA7718N
16/40 Doc ID 16502 Rev 2
4.2.3 High frequency boost

Figure 6 shows the different Loudness shapes in low and high frequency boost.
Figure 6. Loudness attenuation, fc = 2.4 kHz
4.2.4 Flat mode

In flat mode the loudness stage works as a 0 dB to -15 dB attenuator.
TDA7718N Description of the audioprocessor
Doc ID 16502 Rev 2 17/40
4.3 SoftMute

The digitally controlled SoftMute stage allows muting/demuting the signal with a I2 C bus
programmable slope. The mute process can either be activated by the SoftMute pin or by
the I2 C bus. This slope is realized in a special S-shaped curve to mute slow in the critical
regions (see Figure7).
For timing purposes the bit 0 of the I2 C bus output register is set to 1 from the start of muting
until the end of demuting.
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.
4.4 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 SoftStep-feature both kinds of clicks could be
reduced to a minimum and are no more audible. The blend-time from one step to the next is
programmable as 5 ms or 10 ms. The SoftStep control is described in detail in Chapter 4.9.
Description of the audioprocessor TDA7718N
18/40 Doc ID 16502 Rev 2
4.5 Bass

There are four parameters programmable in the bass stage:
4.5.1 Bass attenuation

Figure 8 shows the attenuation as a function of frequency at a center frequency of 80 Hz.
Figure 8. Bass control @ fC = 80 Hz, Q = 1
4.5.2 Bass center frequency

Figure 9 shows the four possible center frequencies 60, 80, 100 and 200 Hz.
Figure 9. Bass center frequencies @ gain = 14 dB, Q = 1
TDA7718N Description of the audioprocessor
Doc ID 16502 Rev 2 19/40
4.5.3 Quality factors

Figure 10 shows the four possible quality factors 1, 1.25, 1.5 and 2.
Figure 10. Bass quality factors @ gain = 14 dB, fC = 80 Hz
4.5.4 DC mode

In this mode the DC-gain is increased by 4.4 dB. In addition the programmed center
frequency and quality factor is decreased by 25 % which can be used to reach alternative
center frequencies or quality factors.
Figure 11. Bass normal and DC mode @ gain = 14 dB, fC = 80 Hz
The center frequency, Q and DC-mode can be set fully independently.
Description of the audioprocessor TDA7718N
20/40 Doc ID 16502 Rev 2
4.6 Middle

There are three parameters programmable in the middle stage:
4.6.1 Middle attenuation

Figure 12 shows the attenuation as a function of frequency at a center frequency of 1 kHz.
Figure 12. Middle control @ fC = 1 kHz, Q = 1
4.6.2 Middle center frequency

Figure 13 shows the four possible center frequencies 500 Hz, 1 kHz, 1.5 kHz and 2.5 kHz.
Figure 13. Middle center frequencies @ gain = 14 dB, Q = 1
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