TDA7402 STMicroelectronics, TDA7402 Datasheet
TDA7402
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TDA7402 Summary of contents
Page 1
... The digital control allows a programming in a wide range of all the filter characteristics. The stereo decoder part also offers several possibilities of programming, especially for the adaptation to different IF devices. Package LQFP44 (10x 10x 1.4mm) Rev 6 TDA7402 LQFP44 Packing Tray 1/69 www.st.com 1 ...
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... Mono differential input 2 (MD2 Single ended stereo input (SE1), single ended mono input (AM) and FM-MPX input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 AutoZero for stereo decoder selection . . . . . . . . . . . . . . . . . . . . . . . . . . 17 AutoZero remain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Loudness order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 DC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 TDA7402 ...
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... TDA7402 3.11 Compander . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 3.11.1 3.11.2 3.11.3 3.12 AC coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.13 Output selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.14 Subwoofer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.15 Speaker attenuator and mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 3.16 Audioprocessor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4 Stereo decoder part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.1 Stereo decoder part features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.2 Stereo decoder electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.3 Notes about the characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.3.1 4 ...
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... Transmitted data (send mode 8.4 Subaddress (receive mode 8.5 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 9 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 10 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 4/69 Automatic threshold control by the stereo blend voltage . . . . . . . . . . . . 44 Over deviation detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Multipath level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 AM mode of the noiseblanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 TDA7402 ...
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... TDA7402 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 4. Thermal data Table 5. Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 6. Attack times vs. soft-step times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Table 7. Stereo decoder electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Table 8. Noise blanker electrical characteristics Table 9. Multipath detector electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Table 10. Transmitted data (send mode Table 11 ...
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... Figure 33. Highcut characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Figure 34. Block diagram of the noise blanker Figure 35. Block diagram of the multipath detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Figure 36. Dual MPX input diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Figure 37. Application diagram (standard configuration Figure 38. Application diagram (Dual MPX mode Figure 39. LQFP44 (10x10) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . 67 6/69 TDA7402 ...
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... TDA7402 1 Pin connections and block diagram Figure 1. Pin connections (top view SE1L 1 SE1R 2 FD1L+/SE3L 3 FD1L-/SE2L 4 FD1R+/SE3R 5 FD1R-/SE2R 6 7 FD2L+ FD2L- 8 FD2R+ 9 FD2R Pin connections and block diagram ACINLR 33 ACINRF 32 ACINRR 31 OUTLF 30 OUTLR 29 OUTRF 28 OUTRR 27 OUTSWL 26 OUTSWR 25 OUTSSL ...
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... Pin connections and block diagram Figure 2. Block diagram ACINLF ACINLR ACINRF ACINRR SWINL SWINR ACOUTR ACOUTL 8/69 TDA7402 ...
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... TDA7402 2 Electrical specifications 25° 10kΩ; all gains = 0dB 1kHz; unless otherwise specified. S amb L Table 2. Electrical characteristics Symbol Parameter Input selector R Input resistance in V Clipping level CL S Input separation IN G Min. input gain IN MIN G Max. input gain IN MAX G Step resolution ...
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... Low threshold for SM Pin TH low V High threshold for SM Pin TH high 10/69 Test condition Main / mix source -20 to +20dB G = -80 to -20dB Adjacent attenuation steps From 0dB to G MIN (2) TDA7402 Min. Typ. Max. Unit -6/- -83 -79 -75 dB 0.5 1 1.5 dB 225 300 W 2 kΩ 4.3 4 ...
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... TDA7402 Table 2. Electrical characteristics (continued) Symbol Parameter R Internal pull-up resistor PU V Internal pull-up voltage PU Bass control C Control range RANGE A Step resolution STEP f Center frequency C Q Quality factor BASS DC Bass-DC-gain GAIN Treble control C Control range RANGE A Step resolution STEP f Center frequency C (3) ...
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... Output mute attenuation MUTE E Attenuation set error steps DC 12/69 Test condition Adjacent attenuation steps d = 0.3% f HP1 f HP2 f HP3 f HP4 f HP5 f HP6 f HP7 f HP8 f LP1 f LP2 Adjacent attenuation steps TDA7402 Min. Typ. Max. Unit kΩ -83 -79 -75 dB 0 2.2 2.6 V RMS 2 kΩ ...
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... TDA7402 Table 2. Electrical characteristics (continued) Symbol Parameter Subwoofer lowpass f Lowpass corner frequency LP (4) Differential outputs R load resistance at each output L R load resistance differential DL C Capacitive load at each output LMAX C Capacitive load differential DLMAX V DC offset at pins Offset R Output impedance OUT V DC voltage level ...
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... -20 to -60dB V Parameter Parameter Test condition Audioprocessor (all Filters flat) Min. Typ. Max 106 100 0.005 0.1 0.05 0.1 80 100 - Value 10.5 - -55 to +150 ±2000 ±200 Value 65 Min. Typ. Max. 7 TDA7402 Unit µV µ Unit V °C ° Unit °C/W Unit ...
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... TDA7402 3 Audioprocessor part 3.1 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) – ...
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... SE4R 28K 28K 100K - + 28K 28K 100K 100K 100K NOISE BLANKER + STEREO DECODER 100K TDA7402 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 ...
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... TDA7402 3.2.1 Full differential stereo input 1 (FD1) The FD1 input is implemented as a buffered full-differential stereo stage with 100kΩ input impedance at each input. The attenuation is programmable in 3 steps from 0 to -12dB in order to adapt the incoming signal level. A 6dB attenuation is included in the differential stage, the additional 6dB are done by a following resistive divider ...
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... AutoZero action because no new source is selected and an undesired mute would appear at the outputs. For such applications the TDA7402 could be switched in the AutoZero Remain Mode (Bit 6 of the subaddress byte). If this bit is set to high, the DATABYTE 0 could be loaded without invoking the AutoZero and the old adjustment value remains ...
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... TDA7402 3.4.3 Peak frequency Figure 5 shows the four possible peak-frequencies at 200, 400, 600 and 800Hz Figure 5. Loudness center frequencies @ Attn. = 15dB. 0.0 -5.0 dB -10.0 -15.0 -20.0 10.0 3.4.4 Loudness order Different shapes of 1st and 2nd-order loudness st Figure 6. 1 and 2 0.0 -5.0 dB -10 ...
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... For steps more than 0.5dB the Soft Step mode should be deactivated because it could generate a hard 1dB step during the blend time. 20/69 7 bus output register is set to 1 from the start of muting 1 EXT. MUTE +SIGNAL REF -SIGNAL BUS OUT V OUT 1dB 0.5dB SS Time -0.5dB -1dB Time D97AU634 Time D00AU1170 TDA7402 2 C bus ...
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... TDA7402 3.7 Bass There are four parameters programmable in the bass stage: 3.7.1 Attenuation Figure 9 shows the attenuation as a function of frequency at a center frequency of 80Hz. Figure 9. Bass control @ f 15.0 10.0 5.0 dB 0.0 -5.0 -10.0 -15.0 10.0 3.7.2 Center frequency Figure 10 shows the eight possible center frequencies 60, 70, 80, 90, 100, 130, 150 and 200Hz ...
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... Figure 12. 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. 22/69 = 80Hz C 100.0 1.0K 100.0 1.0K TDA7402 10.0K = 80Hz C 10.0K ...
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... TDA7402 3.8 Treble There are two parameters programmable in the treble stage: 3.8.1 Attenuation Figure 13. shows the attenuation as a function of frequency at a center frequency of 17.5kHz. Figure 13. Treble control @ f 15.0 10.0 5.0 0.0 -5.0 -10.0 -15.0 10.0 3.8.2 Center frequency Figure 14. shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz. ...
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... Voice band application Figure 16. Voiceband application with HPF 300/450/600/750Hz and LPF 3k/6kHz 0.0 -10.0 -20.0 dB -30.0 -40.0 -50.0 10.0 24/69 100.0 1.0K Hz 100.0 1.0K Hz TDA7402 10.0K 10.0K ...
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... Signal compression A fully integrated signal compressor with programmable attack and decay times is present in the TDA7402 (see The compander consists of a signal level detection, an A/D Converter plus adder and the normal Soft Step volume stage. First of all the left and the right InGain-signal is rectified, respectively, and the logarithm is build from the summed signal ...
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... In the following table the related Soft Step times are shown: Table 6. Attack times vs. soft-step times 26/69 0 -8dB -10 2:1 Output Level -20 dB -30 -40 -50 -60 0 -10 -20 Input Level Attack time 6ms 12ms 24ms 48ms -38dB 15dB -30 -40 -50 -60 dB Soft Step time 0.16ms 0.32ms 0.64ms 1.28ms TDA7402 2 C ...
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... TDA7402 3.12 AC coupling In some applications additional signal manipulations are desired, for example surround sound or more band equalizing. For this purpose an AC coupling is placed before the speaker attenuator, which can be activated or internally shorted by the I condition the input signal of the speaker attenuator is available at the AC outputs. The input impedance of this AC Inputs is 50kΩ ...
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... LEFT CHANNEL MAIN SOURCE RIGHT CHANNEL SECOND SOURCE LEFT CHANNEL SECOND SOURCE 28/69 220nF 220nF ACINF ACOUT ACINR VOICE BAND BANDPASS 25K 50K 50K MS MONO 25K LOWPASS 25K SEC.S MONO OFF/ON FC 25K TDA7402 SWIN SPEAKER FRONT SPEAKER REAR 50K SPEAKER SUBWOOFER D00AU1156 ...
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... TDA7402 Figure 21. Application 2 using internal highpass and external stereo low pass filter MAIN SOURCE LEFT CHANNEL MAIN SOURCE RIGHT CHANNEL SECOND SOURCE LEFT CHANNEL SECOND SOURCE Figure 22. Application 3 using pure external filtering (e.g. DSP) MAIN SOURCE LEFT CHANNEL MAIN SOURCE RIGHT CHANNEL ...
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... During this mode the input resistance of 100kOhm is disconnected from the pin. The internal signals available are shown in the data byte specification. 30/69 VOLUME FRONT +15/-79dB 1dB Step 25K VOLUME REAR +15/-79dB 1dB Step 25K VOLUME 25K 25K +15/-79dB 1dB Step TDA7402 1 OUTF 1 OUTR D00AU1164 of the stereo decoder testing 0 ...
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... TDA7402 4 Stereo decoder part 4.1 Stereo decoder part features ● No external components necessary ● PLL with adjustment free, fully integrated VCO ● Automatic pilot dependent MONO/STEREO switching ● Very high suppression of intermodulation and interference ● Programmable roll off compensation ● Dedicated RDS-Soft Mute ● ...
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... TDA7402 Typ. Max. Unit 50 75 µs 62.5 80 µs 75 100 µs 100 130 µs 3 37.5 µ ...
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... TDA7402 Table 7. Stereo decoder electrical characteristics (continued) Symbol Parameter Intermodulation (Note 4.3.1) α2 f =10kHz, f =1kHz mod spur α3 f =13kHz, f =1kHz mod spur Traffic Radio (Note 4.3.2) α57 Signal f=57kHz SCA - Subsidiary Communications Authorization (Note 4.3.3) α67 Signal f = 67kHz ACI - Adjacent Channel Interference (Note 4.3.4) α ...
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... V spurious at1kHz ( ) V signal O -------------------------------------------------------------- - at4kHz ( ) s V spurious O Test condition meas.with V =0.9V PEAK meas.with V =1.5V PEAK ( ⋅ ) 110kHz 3 38kHz = – ( ⋅ 186kHz – 5 38kHz Min. Typ. Max. 111 30 110 35 101 40 100 45 011 50 010 55 001 60 000 65 00 260 01 220 10 180 11 140 TDA7402 Unit ...
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... TDA7402 Table 8. Noise blanker electrical characteristics (continued) Symbol Parameter V Rectifier voltage RECT Deviation dependent V DE RECT rectifier voltage V Fieldstrength V controlled rectifier FS RECT voltage T Suppression pulse duration FM SFM T Suppression pulse duration AM SAM V Noise rectifier discharge RECTAD adjustment J (2) Noise rectifier SR PEAK charge ...
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... Figure 26. Deviation controlled trigger adjustment Figure 27. Field strength controlled trigger adjustment V PEAK » 3V 36/ HIGH PEAK OLD 65m 30m MONO STEREO NOISE ATC_SB OFF (11) noisy signal 260m V (00) 220m V (01 (10 (11 ISE OLLE 1. etector o ff (11 TIO N [KH z] 2.3V (00) 1.8V (01) 1.3V (10) 0.9V good signal E' TDA7402 ...
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... TDA7402 4.5 Multipath detector 4.5.1 Multipath detector features ● internal 19kHz band pass filter ● programmable band pass and rectifier gain ● selectable internal influence on stereo blend and/or Highcut Table 9. Multipath detector electrical characteristics Symbol Center frequency of f CMP multipath-bandpass G Bandpass gain ...
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... Stereo decoder mute The TDA7402 has a fast and easy to control RDS mute function which is a combination of the audioprocessor's Soft Mute and the high ohmic mute of the stereo decoder. If the stereo decoder is selected and a Soft Mute command is sent (or activated through the SM-pin) the stereo decoder will be set automatically to the high-ohmic mute condition after the audio- signal has been softmuted ...
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... TDA7402 offers an I for the lowpass behavior of the tuner section. If the tuner's attenuation at 38kHz range from 7.2% to 31.0%, the TDA7402 needs no external network in front of the MPX-pin. Within this range, an adjustment to obtain at least 40dB channel separation is possible. The bits for this adjustment are located together with the fieldstrength adjustment in one byte. This gives ...
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... V available. The detector output (signal STEREO, see checked by reading the status byte of the TDA7402 via I can be set into "Hold"-mode which freezes the PLL's state (bit D releasing the Soft Mute the PLL will again follow the input signal only by correcting the phase error ...
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... TDA7402 5.8 Stereo blend control The stereo blend control block converts the internal LEVEL voltage (LEVELSB) into an demodulator compatible analog signal which is used to control the channel separation between 0dB and the maximum separation. Internally this control range has a fixed upper limit which is the internal reference voltage REF5V. The lower limit can be programmed between 20 and 70% of REF5V in 3 ...
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... Functional description of stereo decoder Figure 33. Highcut characteristics 42/69 LOWPASS TIME CONSTANT τ ' • 3.7 DEEMPHASIS SHIFT ON Deemp τ 3 • Deemp OFF τ Deemp τ ' Deemp VHCL D00AU1169 TDA7402 VHCH FIELDSTRENGHT ...
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... TDA7402 6 Functional description of the noise blanker 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 audible influence of the spikes. Therefore the output of the stereo decoder is held at the actual voltage for a time between 22 and 38µ ...
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... Multipath level To react on high repetitive spikes caused by a multipath-situation, the discharge time of the PEAK voltage can be decreased depending on the voltage-level at pin MPout. The TDA7402 offers a linear as well as a threshold driven control. The linear influence of the multipath level on the PEAK-signal (D The second possibility is to activate the threshold driven discharge which switches on the 18kOhm discharge if the multipath level is below 2 ...
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... BANDPASS MP_IN 19KHz GAIN 2 bits 7.1 Quality detector The TDA7402 offers a quality detector output which gives a voltage representing the FM reception conditions. To calculate this voltage the MPX-noise and the multipath-detector output are summed according to the following formula 1.6 (V Qual Noise The noise-signal is the PEAK signal without additional influences (see the noiseblanker description) ...
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... Feature description The TDA7402 is able to support a twin tuner concept via the Dual MPX Mode. In this configuration the MPX pin and the MD2G pin are acting as MPX1 and MPX2 inputs. The DC voltage at the MD2 pin controls whether one or both MPX signals are used to decode the stereo FM signal ...
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... TDA7402 bus interface 8.1 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 Start R/W = "0" -> Receive-Mode (Chip could be programmed by µP) " ...
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... Configuration Audioprocessor Subwoofer attenuator Subwoofer attenuator Speaker attenuator Speaker attenuator Speaker attenuator Speaker attenuator Mixing Level Control Testing Audioprocessor stereo decoder Noise-Blanker Noise-Blanker AM-Noiseblanker 1 0 High-Cut Control Fieldstr. & Quality Multipath-Detector stereo decoder Adjustment Configuration stereo decoder Testing Sterodecoder TDA7402 Function ...
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... TDA7402 8.5 Data byte specification The status after power on reset is marked bold face / underlined in the programming tables. Table 13. Main selector (0) MSB Table 14. Main loudness (1) MSB LSB Source selector FD1 / SE2 SE3 FD2 SE1 MD2 MD1 / SE4 Stereo decoder Input gain 0 0 0dB ...
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... Treble filter (3) MSB 50/69 LSB Gain/attenuation (+32.0dB (+31.5dB +20.0dB +19.5dB +19.0dB : : : : : : +0.5dB 0.0dB -0.5dB : : : : : : -79.0dB -79.5dB 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 TDA7402 Attenuation Function ...
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... TDA7402 Table 17. Bass filter (4) MSB Table 18. Mixing programming (5) MSB LSB Bass steps -15dB -14dB : : : : : : + +15dB Bass Q-factor 1.0 1.25 1.5 2.0 Bass DC-mode Off On LSB Mixing 0 Mute 1 enable Mixing source 0 0 Beep 0 1 MD1 1 0 MD2 mono Mixing target 0 Speaker LF off ...
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... Influence on Soft Mute on off Beep frequencies 600 Hz 780 Hz 1.56 kHz 2.4 kHz 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 TDA7402 Function Function ...
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... TDA7402 Table 20. Voiceband (7) (continued) MSB Table 21. Second source selector (8) MSB LSB High pass cut off frequency 0 0 90Hz 0 1 135Hz 1 0 180Hz 1 1 215Hz 0 0 300Hz 0 1 450Hz 1 0 600Hz 1 1 750Hz Anti clipping enable on off Anti clipping input MP-In AM LSB ...
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... Subwoofer outputs 0 differential (mono) 1 single ended (stereo) Subwoofer source 0 Second source 1 Main source Subwoofer phase 0 180° 1 0° Bass center frequency 60Hz 80Hz 70Hz 90Hz 100Hz 130Hz 150Hz 200Hz TDA7402 Function Function ...
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... TDA7402 Table 24. Compander (11) MSB Note: The Soft Step times are only programmable while the compander is not in use. Table 25. Configuration audioprocessor I (12) MSB LSB Activity / reference level 0 0 off RMS RMS Attack-times 0 0 6ms 0 1 12ms 1 0 24ms 1 1 49ms Release-times ...
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... Second source internal coupled Main source AC coupled Main source internal coupled LSB Pause detector 0 off 1 on Pause ZC window 0 0 160mV 0 1 80mV 1 0 40mV 1 1 not allowed FD1 mode 0 single ended 1 differential FD1 attenuation 0 -12dB 1 -6dB 0 -6dB 1 0dB TDA7402 Function Function ...
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... TDA7402 Table 26. Configuration audioprocessor II (13) (continued) MSB Table 27. Speaker, subwoofer and mixer level-control (14-20) MSB The programming of all speaker, subwoofer and mixing level controls are the same. LSB FD2 attenuation -6dB 0dB MD1 mode single ended differential LSB + - - - - Mute bus interface ...
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... NB-hold internal reference Compander testmode 0 off 1 on Clock external internal AZ function off on SC-clock Fast mode Normal mode LSB STD unmuted 1 STD muted 0 0 IN-gain IN-gain 8 IN-gain IN-gain 3 Input AM pin 1 Input MPX pin TDA7402 Function Function ...
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... TDA7402 Table 29. Stereo decoder (22) (continued) MSB De-emphasis-Shift enabled (Subaddr.26/Bit7 = 0) Table 30. Noise blanker I (23) MSB LSB Forced MONO 1 MONO/STEREO switch automatically Pilot threshold HIGH Pilot threshold LOW De-emphasis 50µs De-emphasis 62.5µs (46.9µs De-emphasis 75µs De-emphasis 100µs (75µs LSB Noise blanker off ...
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... Noise rectifier discharge resistor R = infinite Strong multipath influence on PEAK 18k off on (18k discharge if V LSB Stereo decoder mode rectifier gain 6dB 8dB 10dB 12dB 14dB 16dB 18dB 20dB Function = 56k = 33k = 18k < 2.5V) MPout Function TDA7402 ...
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... TDA7402 Table 32 noiseblanker (25) (continued) MSB Table 33. High cut (26) MSB LSB Rectifier cut off frequency 0 14.0kHz 1 18.5kHz 0 28.0kHz 1 56.0kHz must be "1" LSB High cut 0 off 1 on max. high cut 0 0 2dB 0 1 5dB 1 0 7dB 1 1 10dB VHCH 42% REF5V 0 1 50% REF5V 1 0 58% REF5V ...
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... REF5V 66.6% REF5V 70.0% REF5V Quality detector co-efficient 0 a=0.7 1 a=0.85 0 a=1.0 1 a=1.15 HCC level shift (only level through MPD) 0.0V 500mV 1.0 V 1.5 V LSB Fast Load off Bandpass Gain 0 0 6dB 0 1 12dB 1 0 16dB 1 1 18dB TDA7402 Function Function ...
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... TDA7402 Table 35. Multipath detector (28) (continued) MSB Table 36. Stereo decoder adjustment (29) MSB LSB Rectifier gain 0 0 Gain = 7.6dB 0 1 Gain = 4.6dB 1 0 Gain = 0dB 1 1 disabled Charge current at MP out 0.25µA 0.50µA Multipath on high cut decay time 2ms 10ms Multipath influence on PEAK discharge ...
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... Stereo decoder configuration (30) MSB Using the multipath time-constants for stereo bland and high cut 64/69 LSB Multipath influence on high cut Off Multipath influence on stereo blend Off Level input over multipath detector Off Dual MPX mode Off 1 1 must be "1" TDA7402 Function (1) ...
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... TDA7402 Table 38. Testing stereo decoder (31) MSB Note: This byte is used for testing or evaluation purposes only and must not set to other values than "11111100" in the application! LSB Main testmode 0 off 1 on Stereo decoder testmode 0 off 1 on Test signals F228 threshold Level for stereo blend ...
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... CREF 39 ACOUTL 38 ACOUTR 37 220nF SWINR 36 220nF SWINL 35 470nF 470nF ACINLF 34 ACINLR 33 ACINRF 32 ACINRR SCL VDD + VB1 = 100nF - 9 D00AU1158 SDA SCL TDA7402 OUTSSR MD2G MD2 MD1G MD1 MUX PAUSE ACOUTL ACOUTR OUTSSR MPX2 VPX CONTROL MD1G MD1 MUX PAUSE ACOUTL ACOUTR ...
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... TDA7402 10 Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK packages. ECOPACK 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 trademark. ECOPACK specifications are available at: www.st.com. ...
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... Document revision history Date 26-Apr-2002 21-Jun-2004 26-Apr-2004 26-Apr-2006 23-Mar-2007 18-Sep-2008 68/69 Revision 1 Initial release 2 Technical migration from ST-PRESS to EDOCS 3 Revalidation 4 Minor text changes. Document reformatted. 5 Package change, text modifications. Content of the Table 6 readability, no technical changes. Changes 18, Table 19 and Table 24 reworked to improve TDA7402 ...
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... TDA7402 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. ...