TDA7412 ST Microelectronics, TDA7412 Datasheet
TDA7412
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TDA7412 Summary of contents
Page 1
... NO EXTERNAL ADJUSTMENTS AM/FM NOISEBLANKER WITH SEVERAL TRIGGER CONTROLS PROGRAMMABLE MULTIPATH DETECTOR QUALITY DETECTOR OUTPUT October 2003 CARRADIO SIGNAL PROCESSOR TQFP44 ORDERING NUMBER: TDA7412 Digital Control C-BUS INTERFACE DESCRIPTION The device includes a high performance audiopro- cessor and a stereodecoder-noiseblanker combina- tion with the whole low frequency signal processing necessary for state-of-the-art as well as future carra- dios ...
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... TDA7412 PIN CONNECTION (Top view) SE1L SE1R FD1L+/SE3L FD1L-/SE2L FD1R+/SE3R FD1R-/SE2R FD2L+ FD2L- FD2R+ FD2R- AM ESD: All pins are protected against ESD according to the MIL883 standard. ABSOLUTE MAXIMUM RATINGS Symbol V Operating Supply Voltage S T Operating Temperature Range ...
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... BLOCK DIAGRAM ACINLF ACINLR ACINRF ACINRR SWINL SWINR ACOUTR ACOUTL TDA7412 3/56 ...
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... TDA7412 Audioprocessor Part Features: Input Multiplexer 2 fully differential CD stereo inputs with programmable attenuation 1 single-ended stereo input 2 differential mono input 1 single-ended mono input In-Gain 0..15dB, 1dB steps internal Offset-cancellation (AutoZero) separate second source-selector Beep internal Beep with 4 frequencies Mixing stage Beep, Phone and Navigation mixable to all speaker-outputs ...
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... 1kHz CM RMS 10kHz CM RMS Differential 1kHz CM RMS 10kHz CM RMS Mix-Gain = 6dB f Beep1 f Beep2 f Beep1 f Beep1 Main / Mix-Source TDA7412 Min. Typ. Max. Unit 70 100 130 k 1.8 2.2 V RMS 80 100 0 ...
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... TDA7412 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter G Max. Gain MAX A Max. Attenuation MAX A Attennuation Step STEP 1 MULTIPLEXER OUTPUT R Output Impedance OUT R Output Load Resistance L C Output Load Capacitance Voltage Level DC LOUDNESS CONTROL A Step Resolution STEP A Max. Attenuation MAX f Peak Frequency Peak ...
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... Center Frequency C Test Condition off TDA7412 Min. Typ. Max. Unit 2 3.3 V +14 +15 +16 dB 0 ...
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... TDA7412 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter 1 PAUSE DETECTOR V Zero Crossing Threshold TH I Pull-Up Current DELAY V Pause Threshold THP SPEAKER ATTENUATORS R Input Impedance in G Max. Gain MAX A Max. Attenuation MAX A Step Resolution STEP A Output Mute Attenuation MUTE E Attenuation Set Error Steps DC Notes: 1 ...
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... LP3 coupled; THD=1% RMS coupled; THD=1% RMS coupled; THD=1% RMS coupled; THD=1% RMS C at each Output to Ground Lmax C between Output terminals Lmax Output muted Output muted TDA7412 Min. Typ. Max. Unit 2.7 3 3.3 kHz 5.4 6 6.6 kHz ...
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... TDA7412 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter GENERAL e Output Noise NO S/N Signal to Noise Ratio d distortion S Channel Separation left/right C E Total Tracking Error T 10/56 Test Condition BW = 20Hz - 20kHz output muted all gains = 0dB single ended inputs all gains = 0dB flat RMS bass, treble at +12dB; ...
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... SE4R 28K 28K - + 28K 28K NOISE BLANKER + STEREO DECODER TDA7412 MAIN SOURCE SELECTOR SE3 FD1/SE2 FD2 MD1/SE4 MUTE MD2 IN GAIN SE1 100K AM FM MIXING SELECTOR MD2 MD1 MUTE FM MIXING STAGE BEEP SECOND SOURCE ...
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... TDA7412 Mono-differential Input 1 (MD1) The MD1-input is designed as a basic differential stage with 56k input-impedance. This input is configurable as a single-ended stereo input (see pin-out). Mono-differential Input 2 (MD2) The MD2-input has the same topology as MD1, but without the possibility to configure it to single ended. ...
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... Figure 2 shows the attenuation as a function of frequency at f Figure 2. Loudness Attenuation @ f 0.0 -5.0 -10.0 dB -15.0 -20.0 -25.0 10.0 1.4.2 Peak Frequency Figure 3 shows the four possible peak-frequencies at 200, 400, 600 and 800HzFigure 3: Loudness Center fre- quencies @ Attn. = 15dB Figure 3. Loudness Center frequencies @ Attn. = 15dB. 0.0 -5.0 dB -10.0 -15.0 -20.0 10.0 = 400Hz P = 400Hz. P 100.0 1.0K Hz 100.0 1.0K Hz TDA7412 10.0K 10.0K 13/56 ...
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... TDA7412 1.4.3 Loudness Order Different shapes of 1st and 2nd-Order Loudness Figure 4. 1st and 2nd Order Loudness @ Attn. = 15dB, f 0.0 -5.0 dB -10.0 -15.0 -20.0 10.0 1.4.4 Flat Mode In flat mode the loudness stage works as a 0dB to -19dB attenuator. 1.5 SoftMute The digitally controlled SoftMute stage allows muting/demuting the signal with a I The mute process can either be activated by the SoftMute pin or by the I cial S-shaped curve to mute slow in the critical regions (see Figure 5) ...
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... For steps more than 0.5dB (Volume) /1dB (speaker) the SoftStep mode should be deactivated because it could generate a hard 1dB step during the blend-time. 1.7 Bass There are four parameters programmable in the bass stage: 1.7.1 Attenuation Figure 7 shows the attenuation as a function of frequency at a center frequency of 80Hz. Figure 7. Bass Control @ f C 15.0 10.0 5.0 dB 0.0 -5.0 -10.0 -15.0 10.0 SS Time = 80Hz 100.0 Hz Time D00AU1170 1.0K 10.0K TDA7412 15/56 ...
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... TDA7412 1.7.2 Center Frequency Figure 8 shows the eight possible center frequencies 60, 70, 80, 90, 100, 130, 150 and 200Hz. Figure 8. Bass center Frequencies @ Gain = 14dB 15.0 12.5 10.0 7.5 dB 5.0 2.5 0.0 10.0 1.7.3 Quality Factors Figure 9 shows the four possible quality factors 1, 1.25, 1.5 and 2. Figure 9. Bass Quality factors @ Gain = 14dB, f 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 16/56 100.0 1 ...
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... Figure 10. Bass normal and DC Mode @ Gain = 14dB, f 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 Note: The center frequency, Q and DC-mode can be set fully independently. 1.8 Treble There are two parameters programmable in the treble stage: 1.8.1 Attenuation Figure 11 shows the attenuation as a function of frequency at a center frequency of 17.5kHz. Figure 11. Treble Control @ f 15.0 10.0 5.0 0.0 -5.0 -10.0 -15.0 10.0 = 80Hz C 100.0 1.0K = 17.5kHz C 100.0 1.0K TDA7412 10.0K 10.0K 17/56 ...
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... TDA7412 1.8.2 Center Frequency Figure 12 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz. Figure 12. Treble Center Frequencies @ Gain = 14dB 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 1.9 Subwoofer Application Figure 13. Subwoofer Application with LPF 80/120/160Hz and HPF 90/135/180Hz 0.0 -10.0 -20.0 dB -30.0 -40.0 -50.0 10.0 Both filters, the lowpass- as well as the highpass-filter, have butterworth characteristic so that their cut-off fre- quencies are not equal but shifted by the factor 1 ...
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... MAIN SOURCE LEFT CHANNEL 25K 25K MAIN SOURCE RIGHT CHANNEL SECOND SOURCE 25K 25K LEFT CHANNEL SECOND SOURCE 100.0 1.0K Hz ACOUT ACINF ACINR SWIN VOICE BAND BANDPASS 50K 50K 50K MS MONO LOWPASS SEC.S MONO OFF/ON FC TDA7412 10.0K SPEAKER FRONT SPEAKER REAR SPEAKER SUBWOOFER D00AU1155 19/56 ...
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... TDA7412 1.12 Subwoofer Several different applications are possible with the Subwoofer-circuit: 1. Subwoofer-Filter OFF a. Main-source stereo (AC-coupled) b. Second-source stereo (DC-coupled) c. Main-source mono-differential (DC-coupled) d. Second-source mono-differential (DC-coupled) 2. Subwoofer-Filter ON a. Main-source mono-differential (DC-coupled) b. Second-source mono-differential (DC-coupled) c. Center-Speaker-Mode (filtered mono signal at SWL, unfiltered mono signal at SWR) In all applications the phase of the output-signal can be configured to be 0° ...
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... EXTERNAL FILTERING 220nF 220nF 220nF ACINF ACOUT ACINR VOICE BAND BANDPASS 25K 50K 50K MS MONO 25K LOWPASS 25K SEC.S MONO OFF/ON FC 25K SWIN SPEAKER FRONT SPEAKER REAR SPEAKER SUBWOOFER D00AU1157 220nF SWIN SPEAKER FRONT SPEAKER REAR 50K SPEAKER SUBWOOFER D00AU1163 TDA7412 21/56 ...
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... TDA7412 1.13 Speaker-Attenuator and Mixing A Mixing-stage is placed after each speaker-attenuator and can be set independly to mixing-mode. Having a full volume for the Mix-signal the stage offers a wide flexibility to adapt the mixing levels. Figure 19. Output Selector FRONT FROM OUTPUT SELECTOR REAR FROM MIXING SELECTOR 1.14 Audioprocessor Testing During the Testmode, which can be activated by setting bit D processor testing byte, several internal signals are available at the FD2R- pin ...
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... V LEVEL HCH V >> V LEVEL HCH V >> V LEVEL HCH << V LEVEL HCL V >> V LEVEL HCH V >> V LEVEL HCH V >> V LEVEL HCH V >> V LEVEL HCH << V LEVEL HCL TDA7412 = 500mV (75kHz deviation), modulation Min. Typ. Max. 0.5 1.25 70 100 130 1.5 3.5 4.5 8.5 11 12.5 1.75 2.5 3. 0.02 0 ...
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... TDA7412 2.2 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter L min. LEVEL Gain min L max. LEVEL Gain maxs L LEVEL Gain Step Resolution Gstep VSBL Min. Voltage for Mono min VSBL Max. Voltage for Mono max VSBL Step Resolution step VHCH Min. Voltage for NO Highcut min VHCH Max ...
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... O V signa l at1kHz O --------------------------------------------------------------- - spuriou kHz O V signa l at1kHz O --------------------------------------------------------------- - spuriou kHz O 2 10kHz 19kHz – 3 13kH z 38kH z – 23kHz 2 38kH z – 67 kHz = 67kHz, unmodulated ). S 110 kHz – 3 38kHz 186 kHz 5 38kHz – = 110kHz or 186kHz, un- S TDA7412 25/56 ...
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... TDA7412 4 selectable pulse suppression times for each mode programmable noise rectifier charge/discharge current 2.4.2 ELECTRICAL CHARACTERISTICS All parameters measured in FM mode if not otherwise specified. Symbol Parameter V 1) Trigger Threshold TR V noise controlled TRNOISE Trigger Threshold V Rectifier Voltage RECT V Deviation dependent DEV RECT ...
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... Signal AM-RECTIFIER in Testmode Signal AM-RECTIFIER in Testmode = 2 µ µs and T R HIGH HIGH T F PEAK MIN . ISE RIG . 1.5 V TDA7412 Min. Typ. Max. 00 0.3 01 0.5 10 0 ...
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... TDA7412 Figure 21. Fig. 23: Deviation Controlled Trigger Adjustment 2.8 2.0 1.2 0.9 Figure 22. Fieldstrength Controlled Trigger Adjustment V PEAK » 3V NOISE noisy signal 28/ 2 MONO STEREO 2.3V (00) 1.8V (01) 1.3V (10) ATC_SB OFF (11 etector off (11 TIO N [KH z] 0.9V good signal E' ...
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... BPMP G RECTMP Rectifier Gain I Rectifier Charge Current CHMP I Rectifier Discharge Current DISMP QUALITY DETECTOR A Multipath Influence Factor Test Condition stereodecoder locked on Pilottone TDA7412 Min. Typ. Max. Unit 19 kHz 7 0.25 µA 0 ...
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... TDA7412 3.0 FUNCTIONAL DESCRIPTION OF STEREODECODER Figure 23. Block diagram of Stereodecoder INGAIN MPX 3.5 ... 11dB STEP 2.5dB 100K AM 100K AM-IF D00AU1135 The stereodecoder-part of the A679 (see Fig. 23) contains all functions necessary to demodulate the MPX-sig- nal like pilottone-dependent MONO/STEREO-switching as well as "stereoblend" and "highcut". Adaptations like programmable input gain, roll-off compensation, selectable deemphasis time constant and a programmable fieldstrength input allow to use different IF-devices ...
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... Within this range an adjustment to obtain at least 40dB channel separation is possible. The bits for this adjust- ment are located together with the fieldstrength adjustment in one byte. This gives the possibility to perform an PLL-HOLD INFLUENCE SOFTMUTE STDHMUTE INFLUENCE INFLUENCE SOFTMUTE INFLUENCE SOFTMUTE IIC-BUS TDA7412 MP-HOLD PLL-HOLD STDHMUTE MUTED D00AU1165 internally which is the recom- rms 2 C-bus programmable 31/56 ...
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... TDA7412 optimization step during the production of the carradio where the channel separation and the fieldstrength con- trol are trimmed. The setup of the Stereoblend characteristics which is programmable in a wide range is de- scribed in 2.8. 3.4 Deemphasis and Highcut The deemphasis-lowpass allows to choose a time constant between 37.5 and 100µs. The highcut control range will ...
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... REF5V whereas the range can be set to be 17, 22 33% of VHCH (see fig. 30). Figure 28. Highcut characteristics TIME CONSTANT INTERNAL VOLTAGES LEVEL INTERN REF 5V LEVEL 70% VSBL 20% t FIELDSTRENGHT VOLTAGE D00AU1168 LOWPASS 3.7 ' DEEMPHASIS SHIFT ON Deemp 3 Deemp OFF Deemp ' Deemp VHCL D00AU1169 SETUP OF VMO LEVEL INTERN t VMO VST FIELDSTRENGHT VOLTAGE VHCH FIELDSTRENGHT TDA7412 33/56 ...
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... TDA7412 4.0 FUNCTIONAL DESCRIPTION OF THE NOISEBLANKER In the automotive environment the MPX-signal as well as the AM-signal is disturbed by spikes produced by the ignition and other radiating sources like the wiper-motor. The aim of the noiseblanker part is to cancel the audi- ble influence of the spikes. Therefore the output of the stereodecoder is held at the actual voltage for a time between 22 and 38µ ...
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... AM mode the hold-times of the sample and hold circuit are much longer then in FM (640µs to 1.2ms). All threshold controls can be used like in FM mode. and D of the noiseblanker-byte I (bit combination '00' turns The second possibility is to activate the threshold driven discharge which =infinite and V =2.5V Discharge MPout TDA7412 of Multipath-Control-Byte) gives 7 of noiseblanker-byte II-byte). 7 35/56 ...
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... TDA7412 5.0 FUNCTIONAL DESCRIPTION OF THE MULTIPATH-DETECTOR Using the Multipath-Detector the audible effects of a multipath condition can be minimized. A multipath-condi- tion is detected by rectifying the spectrum around 19kHz in the fieldstrength signal. An external capacitor is used to define the attack- and decay-times for the Stereoblend (see blockdiagram, fig. 32). Due to the very small charge currents this capacitor should be a low leakage current type (e.g ceramic). Using this configuration an adaptation to the user's requirement is possible without effecting the " ...
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... In this mode the stereodecoder highohmic-mute mutes both inputs in parallel. Figure 31. MPX/ MPX1 100K MD2G/ MPX2 100K MD2/ CONTROL 8.2 Configuration The Dual-MPX-Mode can be easily configured by setting bit 3 of subaddress 30 to LOW (see Byte 30 description and Application Diagram of fig. 33). 1 40K 40K 1 CONTROL 1 CIRCUITRY TDA7412 INGAIN 3.5...11dB step 2.5dB D00AU1167 37/56 ...
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... TDA7412 ² 9 BUS INTERFACE 9.1 Interface Protocol The interface protocol comprises: a start condition (S) a chip address byte (the LSB bit determines read / write transmission) a subaddress byte a sequence of data (N-bytes + acknowledge) a stop condition (P) CHIP ADDRESS MSB LSB R/W ACK Start R/W = " ...
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... Testing Audioprocessor Stereodecoder Noise-Blanker Noise-Blanker AM-Noiseblanker High-Cut Control Fieldstr. & Quality Multipath-Detector Stereodecoder Adjustment Configuration Stereodecoder Testing Sterodecoder TDA7412 FUNCTION 39/56 ...
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... TDA7412 9.6 DATA BYTE SPECIFICATION The status after Power-On-Reset is marked bold-face / underlined in the programming tables. 9.6.1 Main Selector (0) MSB 9.6.2 Main Loudness (1) MSB ...
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... LSB Treble Steps -15dB -14dB : : : : + +15dB Treble Center-frequency 10.0 kHz 12.5 kHz 15.0 kHz 17.5 kHz Subwoofer+Center-Speaker Mode On Off TDA7412 ATTENUATION FUNCTION 41/56 ...
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... TDA7412 9.6.5 Bass Filter (4) MSB 9.6.6 Mixing Programming (5) MSB 42/56 LSB Bass Steps ...
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... LSB Voice-Band Low-Pass Enable 0 Filter off 1 Filter on Voice-Band Low-Pass Frequency 0 3 kHz 1 6 kHz Voice-Band High-Pass Enable 0 Filter off 1 Filter on High-Pass Cut-Off-Frequency 90Hz 135Hz 180Hz 215Hz 300Hz 450Hz 600Hz 750Hz Anti-Clipping Enable on off Anti-Clipping Input MP-In AM TDA7412 FUNCTION FUNCTION 43/56 ...
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... TDA7412 9.6.9 Second Source Selector (8) MSB 9.6.10Second Loudness (9) MSB 44/56 LSB Source Selector ...
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... Second Source Main Source Subwoofer Phase 180° 0° Bass Center-Frequency 60Hz 80Hz 70Hz 90Hz 100Hz 130Hz 150Hz 200Hz LSB Not used Not used Not used SoftStep-Time 0 160µs 1 1.28ms 0 5.12ms 1 20.4ms Not used TDA7412 FUNCTION FUNCTION 45/56 ...
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... TDA7412 9.6.13Configuration Audioprocessor I (12) MSB 9.6.14Configuration Audioprocessor II (13) MSB 46/56 LSB SoftStep (Volume & Speaker Attenuator0 ...
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... Test-Multiplexer 0 0 not allowed 0 1 not allowed 1 0 not allowed 1 1 200kHz Oscillator 0 0 not allowed 0 1 not allowed 1 0 NB-Hold 1 1 internal Reference Not used Clock external internal AZ Function off on SC-Clock Fast Mode Normal Mode TDA7412 ATTENUATION FUNCTION 47/56 ...
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... TDA7412 9.6.17Stereodecoder (22) MSB Notes Deemphasis-Shift enabled (Subaddr.26/Bit7 = 0) 9.6.18Noiseblanker I (23) MSB 48/56 LSB ...
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... V LSB Stereodecoder Mode Rectifier Gain 0 0 6dB 0 1 8dB 1 0 10dB 1 1 12dB 0 0 14dB 0 1 16dB 1 0 18dB 1 1 20dB Rectifier Cut-Off Frequency 14.0kHz 18.5kHz 28.0kHz 56.0kHz must be "1" TDA7412 FUNCTION < 2.5V) MPout FUNCTION 49/56 ...
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... TDA7412 9.6.21High-Cut (26) MSB 9.6.22Fieldstrength Control (27) MSB 50/56 LSB ...
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... Multipath on High-Cut Decay-Time 2ms 10ms Multipath influence on PEAK Discharge off -1V/ms LSB Roll-Off Compensation not allowed 7. 9. 13. 20. not allowed 19. 21. 25. 31.0% LEVEL Gain 0dB 0.4dB 0.8dB : 6dB TDA7412 FUNCTION FUNCTION 51/56 ...
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... TDA7412 9.6.25Stereodecoder Configuration (30) MSB Notes: 1. Using the Multipath Time-Constants for Stereo-Bland and High-Cut 9.6.26Testing Stereodecoder(31) MSB ...
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... MD2G 44 220nF MD2 43 220nF MD1G 42 220nF MD1 41 47nF MUX CREF 39 ACOUTL 38 ACOUTR 37 220nF SWINR 36 220nF SWINL 35 470nF ACINLF 34 ACINLR 33 ACINRF 32 ACINRR VDD + VB1 = 100nF - 9 D00AU1161 SCL TDA7412 OUTSSR MD2G MD2 MD1G MD1 MUX PAUSE ACOUTL ACOUTR 470nF 53/56 ...
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... TDA7412 Figure 33. Application Diagram (Dual MPX mode) OUTLF OUTRF OUTLF OUTLR 100nF SEL 30 SEL 1 100nF SER SER 2 220nF FD1L+ FD1L+ 3 220nF FD1L- FD1L- 4 220nF FD1R+ FD1R+ 5 220nF FD1R- FD1R- 6 220nF FD2L+ FD2L+ 7 220nF FD2L- FD2L- 8 220nF FD2R+ FD2R+ 9 220nF FD2R- FD2R- ...
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... MAX. 0.063 0.006 0.055 0.057 0.015 0.018 0.008 0.472 0.480 0.394 0.401 0.315 0.472 0.480 0.394 0.401 0.315 0.031 0.024 0.030 TQFP44 ( 1.4mm) 0.039 TQFP4410 TDA7412 OUTLINE AND MECHANICAL DATA 0.10mm .004 Seating Plane C K 0076922 D 55/56 ...
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... TDA7412 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...