Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsLinear ICsLinear IC - Custom audio Car stereo I²C SOIC 28

September 2013 Rev 7 1/40

TDA7419

3 band car audio processor

Features

■ 4 stereo inputs

■ Soft-step volume

■ Bass, middle, treble and loudness

■ Direct mute and soft-mute

■ Four independent speaker outputs

■ Sub woofer output

■ Soft-step speaker/subwoofer control

■ 7 bands spectrum analyzer

■ Digital control:

–I

C bus interface

Description

The TDA7419 is a high performance signal

processor specifically designed for car radio

applications. The device includes a high

performance audioprocessor with fully integrated

audio filters.

The digital control allows programming in a wide

range of filter characteristics. By the use of

BICMOS-process and linear signal processing

low distortion and low noise are obtained.

SO-28

Table 1. Device summary

Order code Package Packing

TDA7419 SO-28 Tube

TDA7419TR SO-28 Tape and reel

www.st.com

Summary of content (40 pages)

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TDA7419 3 band car audio processor Features ■ 4 stereo inputs ■ Soft-step volume ■ Bass, middle, treble and loudness ■ Direct mute and soft-mute ■ Four independent speaker outputs ■ Sub woofer output ■ Soft-step speaker/subwoofer control ■ 7 bands spectrum analyzer ■ Digital control: – I2C bus interface SO-28 Description The TDA7419 is a high performance signal processor specifically designed for car radio applications.
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Contents TDA7419 Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 3.1 Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2 Thermal data . . . . . .
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TDA7419 Contents 4.8 5 Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.8.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.8.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.9 Subwoofer filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.10 Spectrum analyzer . .
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List of tables TDA7419 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. Table 19. Table 20. 4/40 Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TDA7419 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. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin connection (top view) . . . . . . . . . . . . . . . . . . . . .
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/40 SE2R SE2L VDD GND SUPPLY CREF VREFOUTF InGain DIGITAL CONTROL Treble SDA I2C BUS SCL Softstep Volume Middle AC2INL/ SE3L Bass Subwoofer LPF AC2INR/ SE3R ACINL/ FILOL Softstep MonoFader Softstep MonoFader Softstep MonoFader Softstep MonoFader Softstep MonoFader Softstep MonoFader ACINR/ FILOR HPF HPF Mix Mix MIX/ OUTSW/ OUTRR2 OUTSW/ OUTLR2 OUTRR OUTLR OUTRF OUTLF Block diagram MULTIPLEXER INPUT SoftMute ACOUTR/ AC2OUTR Figure 1.
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TDA7419 2 Pin description Pin description Figure 2. Pin connection (top view) ACOUTR/AC2OUTR 1 28 MIX/OUTSW/OUTRR2 ACINR/FILOR 2 27 VREF ACINL/FILOL 3 26 SAOUT ACOUTL/AC2OUTL 4 25 SAIN SE3L/ACINL 5 24 VDD SE3R/ACINR 6 23 SDA SE2L 7 22 SCL SE2R 8 21 MUTE SE1L 9 20 OUTLF SE1R 10 19 OUTLR DIFFL 11 18 OUTRR DIFFG 12 17 OUTRF DIFFR 13 16 OUTSW/OUTLR2 CREF 14 15 GND D04AU1569 Table 2.
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Pin description Table 2.
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TDA7419 Electrical specifications 3 Electrical specifications 3.1 Supply Table 3. Supply Symbol Parameter Test condition Min. Typ. Max. Unit 8.0 8.5 10 V 35 40 mA Vs Supply voltage Is Supply current Vs = 8.5 V 30 Ripple rejection @ 1 kHz Audioprocessor (all Filters flat) 60 SVRR 3.2 Thermal data Table 4. Thermal data Symbol Parameter RTh j-pins Thermal resistance junction to pinsmax 3.3 dB Value Unit 85 °C/W Value Unit 10.
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Electrical specifications TDA7419 3.4 Electrical characteristics Table 6. Electrical characteristics VS = 8.5V; Tamb = 25°C; RL = 10k; all gains = 0 dB; f = 1 kHz; unless otherwise specified Symbol Parameter Test condition Min. Typ. Max. Unit Supply VS Supply voltage 8 8.5 10 V IS Supply current 27 37 47 mA All single ended inputs 70 100 130 k All Input 1.8 2 VRMS QD input 1.
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TDA7419 Table 6. Electrical specifications Electrical characteristics (continued) VS = 8.5V; Tamb = 25°C; RL = 10k; all gains = 0 dB; f = 1 kHz; unless otherwise specified Symbol Parameter Test condition Min. Typ. Max. Unit Volume control GMAX Max gain 13 15 17 dB AMAX Max attenuation -83 -79 -75 dB ASTEP Step resolution 0.5 1 1.5 dB G = -20 to +20 dB -0.75 0 +0.
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Electrical specifications Table 6. TDA7419 Electrical characteristics (continued) VS = 8.5V; Tamb = 25°C; RL = 10k; all gains = 0 dB; f = 1 kHz; unless otherwise specified Symbol Parameter Test condition Min. Typ. Max. Unit 14 ±15 ±16 dB 0.5 1 1.5 dB fC1 400 500 600 Hz fC2 0.8 1 1.2 kHz fC3 1.2 1.5 1.8 kHz fC4 2 2.5 3 kHz Q1 0.45 0.5 0.55 Q2 0.65 0.75 0.85 Q3 0.9 1 1.1 Q4 1.1 1.25 1.4 14 ±15 ±16 dB 0.5 1 1.
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TDA7419 Electrical specifications Table 6. Electrical characteristics (continued) VS = 8.5V; Tamb = 25°C; RL = 10k; all gains = 0 dB; f = 1 kHz; unless otherwise specified Symbol Parameter Test condition Min. Typ. Max. Unit 1.5 dB ASTEP Step resolution 0.
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Description of the audio processor 4 Description of the audio processor 4.
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TDA7419 Description of the audio processor ● ● ● ● – programmable Q factor for different visual appearance – analog output – controlled by external serial clock Speaker – 4 independent soft-step speaker controls, +15dB to -79dB with 1dB steps – Independent programmable mix input with 50% mixing ratio for front speakers – direct mute Subwoofer – 2nd order low pass filter with programmable cut off frequency – single-ended mono output independent soft-step level control, +15dB to -79dB wit
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Description of the audio processor Figure 3. TDA7419 Input stage QD_L QD_G QD_R QD QD Main Source In Gain SE4 SE1_L SE1_R SE1 SE1 SE2 SE2 SE3 SE3 SE2_L SE2_R AC2IN_L/SE3L AC2IN_R/SE3R Second Source Output Stage 4.3 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.
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TDA7419 Description of the audio processor Figure 4. Loudness attenuation @ fP = 400 Hz. 5 0 -5 -10 -15 -20 10 4.4.2 100 10K 1K Peak frequency Figure 5 shows the three possible peak frequencies 400 Hz, 800 Hz and 2.4 kHz. Figure 5. Loudness center frequencies @ Attn.
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Description of the audio processor 4.4.3 TDA7419 Low and high frequency boost Figure 6 shows the different loudness shapes in low and high frequency boost. Figure 6. Loudness attenuation, fC = 2.4 kHz 5 0 -5 -10 -15 -20 10 4.4.4 100 1K 10K Flat mode In flat mode the loudness stage works as a 0 dB to -15 dB attenuator. 4.5 Soft-mute The digitally controlled soft-mute stage allows muting/demuting the signal with a I2C bus programmable slope.
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TDA7419 Description of the audio processor Figure 7. Soft-mute timing EXT. MUTE 1 +SIGNAL REF -SIGNAL 1 I2C BUS OUT Time D97AU634 1. Please notice that a started mute-action is always terminated and could not be interrupted by a change of the mute -signal 4.5.1 Soft-step 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 audiosignal.
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Description of the audio processor 4.6.1 TDA7419 Attenuation Figure 9 shows the attenuation as a function of frequency at a center frequency of 80 Hz. Figure 9. Bass control @ fC = 80 Hz, Q = 1 15.0 10.0 5.0 dB 0.0 -5.0 -10.0 -15.0 10.0 20/40 100.0 Hz 1.0K 10.
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TDA7419 4.6.2 Description of the audio processor Center frequency Figure 10 shows the four possible center frequencies 60, 80, 100 and 200 Hz. Figure 10. Bass center frequencies @ gain = 15 dB, Q = 1 16 12 8 4 0 -4 10 4.6.3 100 1K 10K Quality factors Figure 11 shows the four possible quality factors 1, 1.25, 1.5 and 2. Figure 11. Bass quality factors @ gain = 14 dB, fC = 80 Hz 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 100.0 1.0K 10.
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Description of the audio processor 4.6.4 TDA7419 DC mode It is used for cut only for shelving filter. 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 12. Bass normal and DC mode @ gain = 14 dB, fC = 80 Hz 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 100.0 1.0K 10.0K 1. The center frequency, Q and DC-mode can be set fully independently.
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TDA7419 4.7.2 Description of the audio processor Center frequency Figure 14 shows the four possible center frequencies 500 Hz, 1 kHz, 1.5 kHz and 2.5 kHz. Figure 14. Middle center frequencies @ gain = 14 dB, Q = 1 4.7.3 Quality factors Figure 15 shows the four possible quality factors 0.5, 0.75, 1 and 1.25. Figure 15.
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Description of the audio processor 4.8 TDA7419 Treble There are two parameters programmable in the treble stage: 4.8.1 Attenuation Figure 16 shows the attenuation as a function of frequency at a center frequency of 17.5 kHz. Figure 16. Treble control @ fC = 17.5 kHz 20 15 10 5 0 -5 -10 -15 -20 10 4.8.2 100 1K 10K Center frequency Figure 17 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5 kHz. Figure 17.
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TDA7419 4.9 Description of the audio processor Subwoofer filter The subwoofer lowpass filter has butterworth characteristics with programmable cut-off frequency (80/120/160 Hz) Figure 18. Subwoofer control 4.10 Spectrum analyzer A fully integrated seven-band spectrum analyzer with programmable quality factor is present. The spectrum analyzer consists of seven band pass filters with rectifier and sample capacitor that stores the maximum peak signal level since the last read cycle.
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Description of the audio processor TDA7419 Figure 20. Timing of the spectrum analyzer 4.11 AC coupling In some applications additional signal manipulations are desired, such as additional band equalizations. For this purpose, an AC coupling can be placed before the loudness attenuator or speaker-attenuators, which can be activated or internally shorted by I2C bus. In short condition, the input-signal of the speaker-attenuator is available at the AC outputs.
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TDA7419 4.12 Description of the audio processor HPF applications For HPF applications, HPF filter is available for additional processing after the speaker control. It is a 2nd order butterworth highpass filter with selectable flat mode. Figure 22 shows the diagram of the HPF that includes an external RC network. Figure 22. HPF diagram External RC network ACOUT /AC2OUT SE3IN /AC2IN ACIN /FILO Gain Control From speaker 4.
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Description of the audio processor 4.14 TDA7419 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 SE1R 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. 4.15 Test circuit Figure 24.
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I2C bus specification TDA7419 5 I2C bus specification 5.1 Interface protocol The interface protocol comprises: 5.1.1 ● 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 500 kbits/s ● 3.
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I2C bus specification TDA7419 5.2 Subaddress (receive mode) Table 7.
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I2C bus specification TDA7419 5.3 Data byte specification Table 8. Main selector (0) MSB LSB Function D7 D6 0 0 : 1 1 D5 0 0 : 1 1 D4 0 0 : 1 1 D3 D2 D1 D0 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 x Source selector QD/SE: QD SE1 SE2 SE3 QD/SE: SE mute mute Input gain 0 dB 1 dB : 14 dB 15 dB 0 1 : 0 1 AutoZero on off 0 1 Table 9.
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I2C bus specification Table 10. TDA7419 Soft-mute / clock generator (2) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 1 Pin influence for mute Pin and IIC IIC 0 1 0 0 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 Soft-mute on off Soft-mute time 0.48 ms 0.96 ms 123 ms 0 1 x Soft-step time 0.160 ms 0.321 ms 0. 642 ms 1.2 8ms 2.56 ms 5.12 ms 10.24 ms 20.48 ms 0 1 0 1 0 1 0 1 Clock fast mode on off 0 1 Table 11.
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I2C bus specification TDA7419 Table 12. Treble filter (4) MSB LSB Function D7 D6 D5 D4 0 0 : 0 0 1 1 : 1 1 0 0 1 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 -15 dB -14 dB : -1 dB 0 dB 0 dB +1 dB : +14 dB +15 dB Treble center frequency 10.0 kHz 12.5 kHz 15.0 kHz 17.5 kHz 0 1 0 1 Reference output select External Vref (4 V) Internal Vref (3.3 V) 0 1 Table 13.
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I2C bus specification Table 14. TDA7419 Bass filter (6) MSB LSB Function D7 D6 0 0 1 1 D5 D4 D3 D2 D1 D0 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 : 0 0 0 0 : 1 1 1 0 : 1 0 0 1 : 0 1 Gain/attenuation -15 dB -14 dB : -1 dB 0 dB 0 dB +1 dB : +14 dB +15 dB Bass Q factor 1.0 1.25 1.5 2.0 0 1 0 1 Bass soft-step on off 0 1 Table 15.
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I2C bus specification TDA7419 Table 16.
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I2C bus specification Table 17. TDA7419 Mixing / gain effect (9) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 1 Mixing to right front speaker on off 0 1 Mixing enable on off 0 1 Subwoofer enable (OUTLR2 & OUTRR2) on off 0 1 0 0 : 1 1 1 1 Table 18.
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I2C bus specification TDA7419 Table 18. Spectrum analyzer / clock source / AC mode (16) (continued) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 Clock source internal external 0 1 0 0 1 1 Coupling mode DC Coupling (without HPF) AC coupling after In gain DC Coupling (with HPF) AC coupling after Bass 0 1 0 1 Table 19.
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Package information 6 TDA7419 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Figure 25. SO-28 mechanical data and package dimensions mm DIM. MIN. TYP. A MAX. MIN. TYP. 2.65 MAX. 0.1 0.3 0.004 0.012 b 0.35 0.49 0.014 0.019 b1 0.
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TDA7419 7 Revision history Revision history Table 20. Document revision history Date Revision Changes 20-Nov-2004 1 Initial release. 16-Mar-2005 2 Inserted new values in electrical characteristics table. 10-Jun-2005 3 Modified the figure 2 block diagram. 08-Oct-2005 4 Minor correction 13-Dec-2005 5 Updated “Absolute maximum ratings” table 3 and “Supply” table 2. 13-Feb-2009 6 Document reformatted. Updated Section 6: Package information on page 38.
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TDA7419 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.