TDA7405TR STMicroelectronics, TDA7405TR Datasheet
TDA7405TR
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TDA7405TR Summary of contents
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EQUALIZER CARRADIO SIGNAL PROCESSOR 1 FEATURES 3 STEREO INPUTS 3 MONO INPUTS DYNAMIC-COMPRESSION-STAGE FOR CD BASS, TREBLE AND LOUDNESS CONTROL EQ-FILTERS FOR SEPARATE FRONT/REAR- EQUALIZATION VOICE-BAND-FILTER FOR MIXING-CHANNEL DIRECT MUTE AND SOFTMUTE INTERNAL BEEP FOUR INDEPENDENT SPEAKER-OUTPUTS INDEPENDENT SECOND SOURCE-SELECTOR ...
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TDA7405 Table 2. SUPPLY Symbol Parameter V Supply Voltage s I Supply Current s SVRR Ripple Rejection @ 1KHz Table 3. THERMAL DATA Symbol R Thermal Resistance Junction-pins max Th j-pins Table 4. ABSOLUTE MAXIMUM RATINGS Symbol V Operating Supply ...
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Figure 4. BLOCK DIAGRAM (Enlarged view) TDA7405 3/57 ...
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TDA7405 4 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 ...
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Table 5. ELECTRICAL CHARACTERISTICS (V =9V; T =25°C; R =10k ; all gains=0dB; f=1kHz; unless otherwise specified) S amb L Symbol Parameter INPUT SELECTOR R Input Resistance in V Clipping Level CL S Input Separation IN G Min. Input Gain ...
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TDA7405 Table 5. ELECTRICAL CHARACTERISTICS (continued) (V =9V; T =25°C; R =10k ; all gains=0dB; f=1kHz; unless otherwise specified) S amb L Symbol Parameter 2) MULTIPLEXER OUTPUT R Output Impedance OUT R Output Load Capacitance ...
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Table 5. ELECTRICAL CHARACTERISTICS (continued) (V =9V; T =25°C; R =10k ; all gains=0dB; f=1kHz; unless otherwise specified) S amb L Symbol Parameter f Center Frequency C Q Quality Factor BASS DC Bass-DC-Gain GAIN TREBLE CONTROL C Control Range RANGE ...
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TDA7405 Table 5. ELECTRICAL CHARACTERISTICS (continued) (V =9V; T =25°C; R =10k ; all gains=0dB; f=1kHz; unless otherwise specified) S amb L Symbol Parameter E Attenuation Set Error Steps DC MONO VOICE BANDPASS f Highpass corner frequency ...
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Table 5. ELECTRICAL CHARACTERISTICS (continued) (V =9V; T =25°C; R =10k ; all gains=0dB; f=1kHz; unless otherwise specified) S amb L Symbol Parameter GENERAL e Output Noise NO S/N Signal to Noise Ratio d distortion S Channel Separation left/right C ...
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TDA7405 5 DESCRIPTION OF THE AUDIOPROCESSOR PART 5.1 Input stages In the basic configuration two full-differential, two mono-differential, one single ended stereo and one single- ended mono input are available. In addition a dedicated input for the stereodecoder MPX-signal is ...
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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). 5.1.4 Mono-differential Input 2 (MD2) The MD2-input has the same topology as ...
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TDA7405 5.4 Loudness There are four parameters programmable in the loudness stage: 5.4.1 Attenuation Figure 6 shows the attenuation as a function of frequency 400Hz. Figure 6. Loudness Attenuation @ fP = 400Hz 0.0 -5.0 -10.0 dB ...
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Loudness Order Different shapes of 1st and 2nd-Order Loudness Figure 8. 1st and 2nd Order Loudness @ Attn. = 15dB, fP=400Hz 0.0 -5.0 dB -10.0 -15.0 -20.0 10.0 5.4.4 Flat Mode In flat mode the loudness stage works as ...
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TDA7405 5.6 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 audiosignal. With ...
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Center Frequency Figure 12 shows the eight possible center frequencies 60, 70, 80, 90, 100, 130, 150 and 200Hz. Figure 12. Bass center Frequencies @ Gain = 14dB 15.0 12.5 10.0 7.5 dB 5.0 2.5 0.0 ...
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TDA7405 5.7.4 DC Mode In this mode the DC-gain is increased by 4.4dB. 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 14. ...
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Center Frequency Figure 16 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz. Figure 16. Treble Center Frequencies @ Gain = 14dB 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 5.9 EQ-Filter There are two EQ-Filters present ...
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TDA7405 5.9.1 Equalizer-Setup The two Filters can be configured in multiple ways in order to cover as most as possible applications. Both filters can be programmed to be either in the front the rear-path, respectively. This feature enables ...
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Frequencies Figure 19 shows the different center frequencies of the EQ-Filter gain Figure 19. Center-Frequencies of EQ-Filter 1e+02 2e+01 5.9.4 Q-Factor Figure 20 shows the four ...
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TDA7405 5.10 Compander 5.10.1Signal-Compression A fully integrated signal-compressor with programmable Attack- and Decay-times is present in the A631 (see Figure 20). The compander consists of a signal-level detection, an A/D-Converter plus adder and the normal SoftStep-Volume-stage. First of all the ...
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To achieve the desired compression characteristic like shown below the volume has to be decreased by 4dB. Figure 22. Compander Characteristic 0 -10 Output Level -20 dB -30 -40 -50 -60 5.10.4I²C -BUS-Timing When the Compander is active a ...
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TDA7405 5.10.6Output Selector The output-selector allows to connect the main- or the second-source to the Front-, Rear-speaker-attenuator, respectively example of this programming the device is able to connect via software the main-source to the back (rear) and the ...
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STEREODECODER-PART 6.1 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-Softmute Highcut- and Stereoblend-characterisctics programmable in a wide range ...
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TDA7405 Table 7. ELECTRICAL CHARACTERISTICS (continued 9V, deemphasis time constant = 50µs, MPX input voltage V S modulation frequency = 1kHz, input gain = 6dB, T Symbol Parameter Deemphasis Timeconstants FM DeempF M M Highcut Timeconstant Multiplier FM ...
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Table 7. ELECTRICAL CHARACTERISTICS (continued 9V, deemphasis time constant = 50µs, MPX input voltage V S modulation frequency = 1kHz, input gain = 6dB, T Symbol Parameter 2 f =10kHz, f =1kHz mod spur 3 f =13kHz, f ...
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TDA7405 Note 4. ACI ( Adjacent Channel Interference ) 114 = 190 = measured with: 90% mono signal; 9% pilot signal; fm=1kHz; 1% spurious signal (f modulated). 8 NOISE BLANKER PART 8.1 Features: AM and FM mode internal 2nd order ...
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Table 8. ELECTRICAL CHARACTERISTICS (continued) All parameters mesured in FM mode if not otherwise specified. Symbol Parameter V Rectifier Voltage RECT V Deviation dependent DEV RECT Rectifier Voltage V Fieldstrength FS RECT controlled Rectifier Voltage T Suppression Pulse Duration FM ...
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TDA7405 Figure 25. Noiseblanker Test-Pulse Figure 26. Trigger Threshold vs. VPEAK VTH MIN. TRIG. THRESHOLD 65mV 8 STEPS 30mV 0.9V 28/ HIGH T F 1.5V Time 260mV (00) 220mV (01) 180mV (10) ...
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Figure 27. V PEAK [ 2.8 2.0 1.2 0.9 20 Figure 28. Fieldstrenth Controlled Trigger Adjustment V PEAK 3V NOISE noisy signal 32 MONO STEREO 2.4V (00) 1.9V (01) 1.4V (10) ATC_SB OFF (11) good signal ...
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TDA7405 9 MULTIPATH DETECTOR 9.1 Features: internal 19kHz band-pass filter programmable band-pass- and rectifier-gain selectable internal influence on Stereoblend and/or Highcut Table 9. ELECTRICAL CHARACTERISTICS Symbol Parameter f Center frequency of Multipath- CMP Bandpass G Bandpass Gain BPMP G Rectifier ...
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The stereodecoder-part of the A631 (see Figure 28) contains all functions necessary to demodulate the MPX- signal 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 ...
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TDA7405 10.2 InGain + Infilter The InGain stage allows to adjust the MPX-signal to a magnitude of about 1Vrms internally which is the recom- mended value. The 4.th order input filter has a corner frequency of 80kHz and is used ...
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Stereoblend Control The stereoblend 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. Inter- nally this control range has a fixed ...
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TDA7405 Figure 34. Highcut characteristics 11 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 ...
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The low threshold is active in combination with a good MPX signal without noise; the PEAK voltage is less than 1V. The sensitivity in this operation is high. If the MPX signal is noisy (low fieldstrength) the PEAK voltage in- ...
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TDA7405 Figure 36. Blockdiagram of the Multipath-Detector 11.5 Quality Detector The TDA7405 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 ...
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Dual-MPX Mode The TDA7405 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 ...
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TDA7405 Figure 38. Weak-Signal Mute-Depth @ 0.5V Threshold -10 -15 -20 -25 -30 -35 -40 0.0 0.1 Figure 39. Weak-Signal Mute-Threshold @ 24dB Mute-Depth -10 -15 -20 -25 -30 0.0 0.1 11.8 Stereodecoder Testmode ...
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I²C BUS INTERFACE 12.1 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 ...
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TDA7405 12.2 SUBADDRESS (receive mode) MSB ...
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DATA BYTE SPECIFICATION The status after Power-On-Reset is marked bold-face / underlined in the programming tables. Table 11. Main Selector (0) MSB ...
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TDA7405 1) Table 13. Volume (2) MSB ...
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Table 15. Bass Filter (4) MSB ...
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TDA7405 Table 17. SoftMute (6) MSB Table 18. VoiceBand (7) MSB ...
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Table 19. Second Source Selector (8) MSB Table ...
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TDA7405 Table 21. EQ-Configuration / Bass (10) MSB ...
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Table 23. Configuration Audioprocessor I (12) MSB Table 24. Configuration Audioprocessor II ...
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TDA7405 Table 25. Equalizer Low-Filter (14) MSB ...
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Table 27. Speaker, Subwoofer and Mixer Level-Control (16-20) The programming of all Speaker-, Subwoofer and Mixing Level-Controls are the same. MSB ...
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TDA7405 Table 29. Stereodecoder (22) MSB Note Deemphasis-Shift enabled (Subaddr.26/Bit7 = 0) Table 30. Noiseblanker I (23) ...
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Table 31. Noiseblanker II (24) MSB Table 32 FM-Noiseblanker (25) MSB ...
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TDA7405 Table 33. High-Cut (26) MSB Table 34. Fieldstrength Control (27) MSB ...
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Table 35. Multipath Detector (28) MSB Table 36. Stereodecoder Adjustment (29) MSB ...
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TDA7405 Table 37. Stereodecoder Configuration (30) MSB Note: 1. Using the Multipath Time-Constants for Stereo-Bland and High-Cut Table 38. ...
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Figure 40. TQFP44 (10 x 10) Mechanical Data & Package Dimensions mm DIM. MIN. TYP. MAX. A 1.60 A1 0.05 0.15 A2 1.35 1.40 1.45 B 0.30 0.37 0.45 C 0.09 0.20 D 11.80 12.00 12.20 D1 9.80 10.00 10.20 ...
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TDA7405 Table 39. Revision History Date Revision October 2001 May 2004 56/57 1 First Issue 2 modified Electrical Characteristics and Stylesheet Description of Changes ...
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