TDA7405

TDA7405 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/REAREQUALIZATION VOICE-BAND-FILTER FOR MIXING-CHANNEL DIRECT MUTE AND SOFTMUTE INTERNAL BEEP FOUR INDEPENDENT SPEAKER-OUTPUTS INDEPENDENT SECOND SOURCE-SELECTOR FULL MIXING CAPABILITY PAUSE DETECTOR Figure 1. Package ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b ■ ■ ■ ■ ■ ■ ■ ■ ■ TQFP44 Table 1. Order Codes Package TDA7405 TQFP44 1.2 Digital control: ■ 1.1 Stereodecoder ■ RDS MUTE ■ NO EXTERNAL ADJUSTMENTS ■ AM/FM NOISEBLANKER WITH SEVERAL TRIGGER CONTROLS ■ PROGRAMMABLE MULTIPATH DETECTOR ■ QUALITY DETECTOR OUTPUT Part Number 2 I2C-BUS INTERFACE DESCRIPTION The device includes a high performance audioprocessor and a stereodecoder-noiseblanker combination with the whole low frequency signal processing necessary for state-of-the-art as well as future carradios. The digital control allows a programming in a wide range of all the filter characteristics. Also the stereodecoder part offers several possibilities of programming especially for the adaptation to different IF-devices. Figure 2. BLOCK DIAGRAM O May 2004 REV. 2 1/57 TDA7405 Table 2. SUPPLY Symbol Parameter Test Condition Min. Typ. Max. Unit 7.5 9 10.5 V 45 65 85 mA Vs Supply Voltage Is Supply Current Vs = 9V Ripple Rejection @ 1KHz Audioprocessor(all Filters flat) 60 dB Stereodecoder + Audioprocessor 55 dB SVRR Table 3. THERMAL DATA ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b Symbol Parameter RTh j-pins Thermal Resistance Junction-pins max Value Unit 65 °C/W Value Unit 10.5 V -40 to 85 °C -55 to +150 °C Table 4. ABSOLUTE MAXIMUM RATINGS Symbol Vs Parameter Operating Supply Voltage Tamb Operating Temperature Range Tstg Storage Temperature Range 3 ESD All pins are protected against ESD according to the MIL883 standard. Figure 3. PIN CONNECTION (Top view) O 2/57 TDA7405 Figure 4. BLOCK DIAGRAM (Enlarged view) ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b O 3/57 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 Beep with 3 frequencies + diagnostic setting (19kHz tone) Mixing stage Beep, Phone,Navigation and FM mixable to all speaker-outputs (see Figure 20) ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b programmabe Voice-Band Filter Loudness programmable center frequency and frequency response 15 x 1dB steps selectable flat-mode (constant attenuation) Volume 0.5dB attenuator 100dB range soft-step control with programmable times Bass 2nd order frequency response center frequency programmable in 8 steps DC gain programmable ± 15 x 0.5dB steps Treble 2nd order frequency response center frequency programmable in 4 steps ± 15 x 1dB steps Equalizer two stereo equalizing-filters for separate front/rear adaption 1st filter center-frequency programmable in 16 steps (4 steps/octave, min 63Hz, max 840Hz) 2nd filter center-frequency programmable in 16 steps (4 steps/octave, min 300Hz, max 4kHz) quality factor programmable in 4 steps ± 15 x 1dB steps selectable flat-mode Speaker 4 independent speaker controls in 1dB steps control range 95dB O Mute Functions separate Mute direct mute digitally controlled SoftMute with 4 programmable mute-times Pause Detector programmable threshold Compander dynamic range compression for use with CD 2:1 compression rate programmable max. gain 4/57 TDA7405 Table 5. ELECTRICAL CHARACTERISTICS (VS=9V; Tamb=25°C; RL=10kΩ; all gains=0dB; f=1kHz; unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit 70 100 130 kΩ INPUT SELECTOR Rin Input Resistance all single ended Inputs VCL Clipping Level 2.0 2.2 VRMS SIN Input Separation 80 100 dB GIN MIN Min. Input Gain -1 0 +1 dB GIN MAX Max. Input Gain 13 15 17 dB GSTEP Step Resolution 0.5 1 1.5 dB Adjacent Gain Steps -5 1 5 mV GMIN to GMAX -10 1 10 mV ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b VDC Voffset DC Steps Remaining offset with AutoZero 0.5 mV DIFFERENTIAL STEREO INPUTS Rin GCD CMRR eNO Input Resistance (see Fig. 1) Differential 70 100 130 kΩ Gain only at true differential input -1 0 1 dB -5 -6 -7 dB -13 dB Common Mode Rejection Ratio -11 -12 VCM = 1VRMS @ 1kHz 46 70 dB VCM = 1VRMS @ 10kHz 46 60 dB Output-Noise @ Speaker-Outputs 20Hz - 20kHz, flat; all stages 0dB 9 15 µV 72 kΩ DIFFERENTIAL MONO INPUTS Rin CMRR Input Impedance Differential 40 56 Common Mode Rejection Ratio VCM = 1VRMS @ 1kHz 46 70 dB VCM = 1VRMS @ 10kHz 46 60 dB BEEP CONTROL O VRMS Beep Level Mix-Gain = 6dB 250 3501) 500 mV fBeep Beep Frequency fBeep1 470 500 530 Hz fBeep2 740 780 820 Hz fBeep3 1.7 1.8 1.9 kHz fBeep4 18 19 20 kHz 1. The Level for the 19kHz-Testtone is 2.1VRMS MIXING CONTROL MLEVEL Mixing Ratio Main / Mix-Source -6/-6 dB GMAX Max. Gain 13 15 17 dB AMAX Max. Attenuation -83 -79 -75 dB ASTEP Attennuation Step 0.5 1 1.5 dB 5/57 TDA7405 Table 5. ELECTRICAL CHARACTERISTICS (continued) (VS=9V; Tamb=25°C; RL=10kΩ; all gains=0dB; f=1kHz; unless otherwise specified) Symbol Parameter MULTIPLEXER ROUT Test Condition Output Impedance Output Load Capacitance RL Min. Typ. Max. Unit 800 1000 Ω OUTPUT2) 2 kΩ CL VDC DC Voltage Level 4.3 4.5 10 nF 4.7 V 2. If confgured as Multiplexer-Output ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b LOUDNESS CONTROL ASTEP Step Resolution 0.5 1 1.5 dB AMAX Max. Attenuation -21 -19 -17 dB fPeak Peak Frequency fP1 180 200 220 Hz fP2 360 400 440 Hz fP3 540 600 660 Hz fP4 720 800 880 Hz VOLUME CONTROL GMAX Max. Gain 30 32 34 dB AMAX Max. Attenuation -83 -79.5 -75 dB ASTEP Step Resolution 0 0.5 1 dB G = -20 to +20dB -0.75 0 +0.75 dB G = -80 to -20dB -4 0 3 dB 2 dB Attenuation Set Error EA Tracking Error ET VDC DC Steps Adjacent Attenuation Steps 0.1 3 mV From 0dB to GMIN 0.5 5 mV SOFT MUTE AMUTE Mute Attenuation Delay Time TD 80 dB T1 0.48 1 ms T2 0.96 2 ms T3 70 123 170 ms T4 200 324 600 ms 1 V VTH low Low Threshold for SM-Pin3) VTH high High Threshold for SM - Pin 2.5 RPU Internal pull-up resistor 32 VPU Internal pull-up Voltage O 100 V 45 58 3.3 kΩ V 3. The SM-Pin is active low (Mute = 0) BASS CONTROL CRANGE Control Range ±14 +15.5 ±16 dB ASTEP Step Resolution 0.1 0.5 1.0 dB 6/57 TDA7405 Table 5. ELECTRICAL CHARACTERISTICS (continued) (VS=9V; Tamb=25°C; RL=10kΩ; all gains=0dB; f=1kHz; unless otherwise specified) Symbol fC Parameter Center Frequency Min. Typ. Max. Unit fC1 Test Condition 54 60 66 Hz fC2 63 70 77 Hz fC3 72 80 88 Hz fC4 81 90 99 Hz fC5 90 100 110 Hz fC6 117 130 143 Hz fC7 135 150 165 Hz fC8 180 200 220 Hz Q1 0.9 1 1.1 Q2 1.1 1.25 1.4 Q3 1.3 1.5 1.7 Q4 1.8 2 2.2 DC = off -1 0 +1 dB DC = on 4 4.4 6 dB ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b QBASS DCGAIN Quality Factor Bass-DC-Gain TREBLE CONTROL CRANGE Control Range ±14 +15 ±16 dB ASTEP Step Resolution 0.5 1 1.5 dB fC1 8 10 12 kHz fC2 10 12.5 15 kHz fC3 12 15 18 kHz fC4 14 17.5 21 kHz Center Frequency fC PAUSE DETECTOR4) VTH Zero Crossing Threshold IDELAY Pull-Up Current VTHP Pause Threshold Window 1 40 mV Window 2 80 mV Window 3 160 mV 15 25 35 3.0 µA V 4. If configured as Pause-Output SPEAKER ATTENUATORS O Rin Input Impedance 35 50 65 kΩ GMAX Max. Gain 14 15 16 dB AMAX Max. Attenuation -83 -79 -75 dB ASTEP Step Resolution 0.5 1 1.5 dB AMUTE Output Mute Attenuation 80 90 dB 7/57 TDA7405 Table 5. ELECTRICAL CHARACTERISTICS (continued) (VS=9V; Tamb=25°C; RL=10kΩ; all gains=0dB; f=1kHz; unless otherwise specified) Symbol EE VDC Parameter Test Condition Min. Typ. Attenuation Set Error DC Steps Adjacent Attenuation Steps Max. Unit 2 dB 0.1 5 mV MONO VOICE BANDPASS fHP Highpass corner frequency fHP1 81 90 99 Hz fHP2 120 135 150 Hz fHP3 162 180 198 Hz fHP4 193 215 237 Hz fHP5 270 300 330 Hz fHP6 405 450 495 Hz fHP7 540 600 660 Hz fHP8 675 750 825 Hz fLP1 2.7 3 3.3 kHz fLP2 5.4 6 6.6 kHz ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b fLP Lowpass corner frequency COMPANDER GMAX tAtt tRel VREF CF max. Compander Gain Attack time Release time Compander Reference InputLevel (equals 0dB) Compression Factor Vi < -46dB 19 dB Vi < -46dB, Anti-Clip=On 29 dB tAtt1 6 ms tAtt2 12 ms tAtt3 24 ms tAtt4 49 ms tRel1 390 ms tRel2 780 ms tRel3 1.17 s tRel4 1.56 s VREF1 0.5 VRMS VREF2 1.0 VRMS VREF3 2.0 VRMS Output Signal / Input Signal 0.5 AUDIO OUTPUTS O VCLIP Clipping Level RL Output Load Resistance CL Output Load Capacitance ROUT Output Impedance VDC DC Voltage Level 8/57 d = 0.3% 2.0 2.2 VRMS 2 4.3 kΩ 10 nF 30 120 Ω 4.5 4.7 V TDA7405 Table 5. ELECTRICAL CHARACTERISTICS (continued) (VS=9V; Tamb=25°C; RL=10kΩ; all gains=0dB; f=1kHz; unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit BW = 20Hz - 20kHz;output muted 3 15 µV BW = 20Hz - 20kHz all gains = 0dB single ended inputs 10 20 µV GENERAL eNO S/N Output Noise Signal to Noise Ratio all gains = 0dB flat; VO = 2VRMS 106 dB ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 100 bass, treble at +12dB; a-weighted; VO = 2.6VRMS d distortion SC Channel Separation left/right ET Total Tracking Error dB VIN = 1VRMS ; all stages 0dB 0.005 0.1 % VOUT = 1VRMS ; Bass & Treble = 12dB 0.05 0.1 % 80 100 dB AV = 0 to -20dB -1 0 1 dB AV = -20 to -60dB -2 0 2 dB O 9/57 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 singleended mono input are available. In addition a dedicated input for the stereodecoder MPX-signal is present. Figure 5. Input stages ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 5.1.1 Full-differential stereo Input 1 (FD1) O 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. This input is also configurable as two single-ended stereo inputs (see pin-out). 5.1.2 Full-differential stereo Input 2 (FD2) The FD2-input has the same general structure as FD1, but with a programmable attenuation of 0 or 6dB embedded in the differential stage. 10/57 TDA7405 5.1.3 Mono-differential Input 1 (MD1) The MD1-input is designed as a basic differential stage with 56kΩ 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 MD1, but without the possibility to configure it to single ended. 5.1.5 Single-ended stereo Input (SE1), single-ended mono input (AM) and FM-MPX input All single ended inputs offer an input impedance of 100kW. The AM-pin can be connected by software to the input of the stereodecoder in order to use the AM-Noiseblanker and AM-High-Cut feature. 5.2 AutoZero ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 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. generated through the leakage current of the coupling capacitors, are not canceled). The auto-zeroing is started every time the DATA-BYTE 0 is selected and needs max. 0.3ms for the alignment. To avoid audible clicks the Audioprocessor is muted before the loudness stage during this time. The AutoZerofeature is only present in the main signal-path. 5.2.1 AutoZero for Stereodecoder-Selection A special procedure is recommended for selecting the stereodecoder at the main input-selector to guarantee an optimum offset-cancellation: (Step 0: SoftMute or Mute the signal-path) Step 1: Temporary deselect the stereodecoder at all input-selectors Step 2: Configure the stereodecoder via IIC-Bus Step 3: Wait 1ms Step 4: Select the stereodecoder at the main input-selector first The root cause of this procedure is, that after muting the stereodecoder (Step 1), the internal stereodecoder filters have to settle in order to perform a proper offset-cancellation. 5.2.2 AutoZero-Remain In some cases, for example if the µP is executing a refresh cycle of the IIC-Bus-programming, it is not useful to start a new AutoZero-action because no new source is selected and an undesired mute would appear at the outputs. For such applications the A631 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. 5.3 Pause Detector / MUX-Output The pin number 40(Pause/MUX) is configurable for two different functions: O 1. During Pause-Detector OFF this pin is used as a mono-output of the main input-selector. This signal is often used to drive a level-/equalizer-display on the carradio front-panel. 2. During Pause-Detector ON the pin is used to define the time-constant of the detector by an external capacitor. The pause-detector is driven by the internal stereodecoder-outputs in order to use pauses in the FM-signal for alternate-frequency-jumps. If the signal-level of both stereodecoder channels is outside the programmed voltage-window, the external capacitor is abruptly discharged. Inside the pause-condition the capacitor is slowly recharged by a constant current of 25µA. The pause information is also available via IIC-Bus (see IIC-Bus programming). 11/57 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 at fP = 400Hz. Figure 6. Loudness Attenuation @ fP = 400Hz 0.0 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b -5.0 -10.0 dB -15.0 -20.0 -25.0 10.0 100.0 1.0K 10.0K Hz 5.4.2 Peak Frequency Figure 7 shows the four possible peak-frequencies at 200, 400, 600 and 800Hz Figure 7. Loudness Center frequencies @ Attn. = 15dB 0.0 -5.0 dB -10.0 O -15.0 -20.0 10.0 100.0 1.0K Hz 12/57 10.0K TDA7405 5.4.3 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 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b -10.0 -15.0 -20.0 10.0 100.0 Hz 1.0K 10.0K 5.4.4 Flat Mode In flat mode the loudness stage works as a 0dB to -19dB attenuator. 5.5 SoftMute The digitally controlled SoftMute stage allows muting/demuting the signal with a I2C-bus programmable slope. The mute process can either be activated by the SoftMute pin or by the I2C-bus. This slope is realized in a special S-shaped curve to mute slow in the critical regions (see Figure 9). For timing purposes the Bit of the I2Cbus output register is set to 1 from the start of muting until the end of de-muting. Figure 9. Softmute-Timing O Note: Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal. 13/57 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 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 in four steps. Figure 10. SoftStep-Timing 1dB ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0.5dB SS Time -0.5dB -1dB Note: For steps more than 0.5dB the SoftStep mode should be deactivated because it could generate a hard 1dB step during the blend-time 5.7 Bass There are four parameters programmable in the bass stage: 5.7.1 Attenuation Figure 11 shows the attenuation as a function of frequency at a center frequency of 80Hz. Figure 11. Bass Control @ fC = 80Hz, Q = 1 15.0 10.0 5.0 dB 0.0 O -5.0 -10.0 -15.0 10.0 14/57 100.0 Hz 1.0K 10.0K TDA7405 5.7.2 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, Q = 1 15.0 12.5 10.0 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 7.5 dB 5.0 2.5 0.0 10.0 100.0 Hz 1.0K 10.0K 5.7.3 Quality Factors Figure 13 shows the four possible quality factors 1, 1.25, 1.5 and 2. Figure 13. Bass Quality factors @ Gain = 14dB, fC = 80Hz 15.0 12.5 10.0 7.5 O 5.0 2.5 0.0 10.0 100.0 1.0K 10.0K 15/57 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. Bass normal and DC Mode @ Gain = 14dB, fC = 80Hz 15.0 12.5 10.0 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 7.5 5.0 2.5 0.0 10.0 100.0 1.0K 10.0K Note: The center frequency, Q and DC-mode can be set fully independently. 5.8 Treble There are two parameters programmable in the treble stage: 5.8.1 Attenuation Figure 15 shows the attenuation as a function of frequency at a center frequency of 17.5kHz. Figure 15. Treble Control @ fC = 17.5kHz 15.0 10.0 5.0 0.0 O -5.0 -10.0 -15.0 10.0 16/57 100.0 1.0K 10.0K TDA7405 5.8.2 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 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 7.5 5.0 2.5 0.0 10.0 100.0 1.0K 10.0K 5.9 EQ-Filter There are two EQ-Filters present in the A631: one for the High-Frequency-Range and one for the Low-Frequency-Range with a certain overlap. They are programmable in center-frequeny (4 frequencies/octave), in Q(4 settings) and in Attenuation (1dB-steps). In addition several configurations are possible to use the filters in the frontor rear-path. Table 6. Gain, Center Frequency and Quality Factor of Equalizer Filters Parameter Min Max Unit Gain -15 15 dB Center Frequency Filter 1 63 840 Hz Center Frequency Filter 2 300 4000 Hz 1 4 Quality Factor O 17/57 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- or in the rear-path, respectively. This feature enables to have e.g. the High-Filter in the front- and both filters in the rear-path. Figure 17. Equalizer Configuration ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 5.9.2 Attenuation Figure 18 shows the attenuation as a function of frequency at a center frequency of 625 Hz. Figure 18. Gain/Attenuation of EQ-Filter 15 dB 10 5 0 O -5 -10 -15 2e+01 18/57 1e+02 1e+03 1e+04 Hz 2e+04 TDA7405 5.9.3 Frequencies Figure 19 shows the different center frequencies of the EQ-Filter at 12 dB gain Figure 19. Center-Frequencies of EQ-Filter 14 dB 12 10 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 8 6 4 2 0 -2 2e+01 1e+02 1e+03 1e+04 Hz 2e+04 5.9.4 Q-Factor Figure 20 shows the four possible quality factors 1, 2, 3 and 4. Figure 20. Different Q-factors of Equalizer-Filter 14 dB 12 10 8 6 O 4 2 0 -2 2e+01 1e+02 1e+03 1e+04 Hz 2e+04 19/57 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 left and the right InGain-signal is rectified, respectively, and the logarithm is build from the summed signal. The following low-pass smooth the output-signal of the logarithm-amplifier and improves the low-frequency suppression. The low-pass output-voltage then is A/D-converted an added to the current volume-word defined by the IIC-Bus. Assuming reference-level or higher at the compander input, the output of the ADC is 0. At lower levels the voltage is increasing with 1 Bit/dB. It is obvious that with this configuration and a 0.5dB-step volume-stage the compression rate is fixed to 2:1 (1dB less at the input leads to 0.5dB less at the output). The internal reference-level of the compander is programmable in three steps from 0.5VRMS to 2VRMS. For a proper behavior of the compression-circuit it is mandatory to have at a 0dB input-signal exactly the programmed reference-level after the InGain-stage. E.g. at a configured reference-level of 0.5VRMS the output of the InGain-stage has to have also 0.5VRMS at 0dB source-signal (Usually the 0dB for CD is defined as the maximum possible signal-level). To adapt the external level to the internal reference-level the programmable attenuation in the differential-stages and the InGain can be used. ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b Figure 21. Compander Block Diagram 5.10.2Anti-Clipping O In a second application the compander-circuit can be used for a Anti-Clipping or Limiting function. In this case one of the dedicated inputs (AM or MPin) is connected directly to the Clip-Detector of the Power-Amplifier. If no clipping is detected, the open-collector output of the Power-Amplifier is highohmic and the input-voltage of the rectifier is VREF. The level-detector interprets this as a very small signal and reacts with the maximum programmed compander-gain. In the application this gain has to be compensated by decreasing the volume with the same value in order to get the desired output-level. In clipping situation the open-collector-current generates a voltage-drop at the rectifier-input, which forces the compander to decrease the gain until the clipping disappears. It is even possible to run the compression-mode and the Anti-Clipping mode in parallel. In this case the maximum compander-Gain should be set to 29 dB. 20/57 TDA7405 5.10.3Characteristic To achieve the desired compression characteristic like shown below the volume has to be decreased by 4dB. Figure 22. Compander Characteristic 0 -8dB -10 2:1 Output Level -20 -38dB dB ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b -30 15dB -40 -50 -60 0 -10 -20 -30 -40 Input Level -50 -60 dB 5.10.4I²C -BUS-Timing When the Compander is active a volume- word coming from this stage is added to the I2C-Bus volume-word and the volume is changed with a soft slope between adjacent steps (SoftStep-stage). As mentioned in the description of this stage it is not recommended to change the volume during this slope. To avoid this behaviourwhile the Compander is working, and the volume has to be changed, the compander-hold-bit is implemented (Bit 7 in the subaddress-byte). The recommended timing for changing the volume during compander-ON is the following: 1. Set the compander-hold-bit 2. Wait the actual SoftStep-time 3. Change the volume 4. Reset the compander-hold-bit The SoftStep-times are in compander-ON condition automatically adapted to the attack-time of the Compander. In the following table the related SoftStep-times are shown: O Attack-Time SoftStep-Time 6ms 0.16ms 12ms 0.32ms 24ms 0.64ms 48ms 1.28ms 5.10.5AC-Coupling In some applications additional signal manipulations are desired, for example surround-sound or more-bandequalizing. For this purpose an AC-Coupling is placed before the 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. The input-impedance of this AC-Inputs is 50kΩ. 21/57 TDA7405 5.10.6Output Selector The output-selector allows to connect the main- or the second-source to the Front-, Rear-speaker-attenuator, respectively. As an example of this programming the device is able to connect via software the main-source to the back (rear) and the second-source to the front (see Figure 23). Figure 23. Output Selector ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 5.10.7Speaker-Attenuator and Mixing A Mixing-stage is placed after each speaker-attenuator and can be set independently to mixing-mode. Having a full volume for the Mix-signal the stage offers a wide flexibility to adapt the mixing levels. Figure 24. Mixing Configuration O 5.10.8Audioprocessor Testing During the Testmode, which can be activated by setting bit D0 of the stereodecoder testing-byte and the audioprocessor testing byte, several internal signals are available at the FD2R- pin. During this mode the input resistance of 100kOhm is disconnected from the pin. The internal signals available are shown in the Data-byte specification. 22/57 TDA7405 6 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 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b FM/AMNoiseblanker with several threshold controls ■ Multipath-detector with programmable internal/external influence ■ I2C-bus control of all necessary functions ■ Table 7. ELECTRICAL CHARACTERISTICS VS = 9V, deemphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz deviation), modulation frequency = 1kHz, input gain = 6dB, Tamb = 27°C, unless otherwise specified. Symbol Parameter Test Conditions Min. Input Gain = 3.5dB Typ. Max. Unit 0.5 1.25 Vrms Vin MPX Input Level Rin Input Resistance 70 100 130 kΩ Gmin Min. Input Gain 1.5 3.5 4.5 dB Gmax Max. Input Gain 8.5 11 12.5 dB Gstep Step Resolution 1.75 2.5 3.25 dB SVRR Supply Voltage Ripple Rejection Vripple = 100mV, f = 1kHz 55 dB 50 dB α Max. Channel Separation THD Total Harmonic Distortion fin=1kHz, mono S+N -------------N Signal plus Noise to Noise Ratio A-weighted, S = 2Vrms 80 91 30 0.02 0.3 % dB MONO/STEREO-SWITCH VPTHST1 Pilot Threshold Voltage for Stereo, PTH = 1 10 15 25 mV VPTHST0 Pilot Threshold Voltage for Stereo, PTH = 0 15 25 35 mV VPTHMO1 Pilot Threshold Voltage for Mono, PTH = 1 7 12 17 mV VPTHMO0 Pilot Threshold Voltage for Mono, PTH = 0 10 19 25 mV O PLL ∆f/f Capture Range 0.5 % DEEMPHASIS and HIGHCUT 23/57 TDA7405 Table 7. ELECTRICAL CHARACTERISTICS (continued) VS = 9V, deemphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz deviation), modulation frequency = 1kHz, input gain = 6dB, Tamb = 27°C, unless otherwise specified. Symbol τDeempF Parameter Deemphasis Timeconstants FM Test Conditions Min. Typ. Max. Unit VLEVEL >> VHCH 25 50 75 µs VLEVEL >> VHCH 44 62.5 80 µs VLEVEL >> VHCH 50 75 100 µs VLEVEL >> VHCH 70 100 130 µs M ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b MFM τDeempA Highcut Timeconstant Multiplier FM VLEVEL > VHCH 37.5 µs VLEVEL >> VHCH 47 µs VLEVEL >> VHCH 56 µs VLEVEL >> VHCH 75 µs VLEVEL Transmission-Mode (Data could be received by µP) ACK = Acknowledge P = Stop MAX CLOCK SPEED 500kbits/s 12.1.1Auto increment If bit I in the subaddress byte is set to "1", the autoincrement of the subaddress is enabled. 12.1.2TRANSMITTED DATA (send mode) MSB X LSB X X X X P ST SM SM = Soft mute activated ST = Stereo P = Pause X = Not Used The transmitted data is automatically updated after each ACK. Transmission can be repeated without new chipaddress. 12.1.3Reset Condition A Power-On-Reset is invoked if the Supply-Voltage is below than 3.5V. After that the following data is written automatically into the registers of all subaddresses : O MSB 1 LSB 1 1 1 1 1 1 0 The programming after POR is marked bold-face / underlined in the programming tables. With this programming all the outputs are muted to VREF (VOUT= VDD/2). 39/57 TDA7405 12.2 SUBADDRESS (receive mode) MSB LSB FUNCTION I2 I1 I0 A4 A3 A2 A1 A0 Compander Hold off on 0 1 AutoZero Remain off on 0 1 Auto-Increment Mode off on ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 O 40/57 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 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 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Subaddress Main Source Selector Loudness Volume Treble Bass Mixing Programming SoftMute Voice-Band Second Source Selector Equalizer Frequencies Equalizer-Config. / Bass Compander Configuration Audioprocessor I Configuration Audioprocessor II Equalizer Low-Filter Equalizer High-Filter Speaker attenuator LF Speaker attenuator RF Speaker attenuator LR Speaker attenuator RR Mixing Level Control Testing Audioprocessor Stereodecoder Noise-Blanker I Noise-Blanker II AM / AM-Noiseblanker High-Cut Control Fieldstr. & Quality Multipath-Detector Stereodecoder Adjustment Configuration Stereodecoder Testing Sterodecoder TDA7405 12.3 DATA BYTE SPECIFICATION The status after Power-On-Reset is marked bold-face / underlined in the programming tables. Table 11. Main Selector (0) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 Source Selector FD1 / SE2 SE3 FD2 SE1 MD2 MD1 / SE4 Stereodecoder AM ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 0 : 1 1 0 0 : 1 1 0 0 : 1 1 Input Gain 0dB 1dB : 14dB 15dB 0 1 : 0 1 Mute off on 0 1 Table 12. Loudness (1) MSB LSB FUNCTION D7 O D6 0 0 1 1 0 1 D5 0 1 0 1 D4 D3 D2 D1 D0 0 0 : 0 0 : 1 : 0 0 : 1 1 : 0 : 0 0 : 1 1 : 0 : 0 0 : 1 1 : 1 : 0 1 : 0 1 : 1 : Attenuation 0 dB -1 dB : -14 dB -15 dB : -19 dB not allowed Center Frequency 200Hz 400Hz 600Hz 800Hz Loudness Order First Order Second Order 41/57 TDA7405 Table 13. Volume1) (2) MSB LSB ATTENUATION D7 D6 D5 D4 D3 D2 D1 D0 0 0 : 0 0 0 : 0 0 0 : 1 1 0 0 : 0 0 0 : 0 1 1 : 1 1 0 0 : 0 0 0 : 1 0 0 : 0 0 0 0 : 1 1 1 : 1 0 0 : 1 1 0 0 : 1 1 1 : 1 0 0 : 1 1 0 0 : 0 0 0 : 1 0 0 : 1 1 0 0 : 0 0 1 : 1 0 0 : 1 1 0 1 : 0 1 0 : 1 0 1 : 0 1 Gain/Attenuation (+32.0dB) (+31.5dB) : +20.0dB +19.5dB +19.0dB : +0.5dB 0.0dB -0.5dB : -79.0dB -79.5dB ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b Note: 1. It is not recommended to use a gain more than 20dB for system performance reason. In general, the max. gain should be limited by software to the maximum value, which is needed for the system. Table 14. Treble Filter (3) MSB D7 LSB D6 0 0 1 1 0 1 O 42/57 D5 0 1 0 1 D4 D3 D2 D1 D0 0 0 : 0 0 1 1 : 1 1 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 1 : 0 1 1 0 : 1 0 FUNCTION Treble Steps -15dB -14dB : -1dB 0dB 0dB +1dB : +14dB +15dB Treble Center-frequency 10.0 kHz 12.5 kHz 15.0 kHz 17.5 kHz Bass DC-Mode On Off TDA7405 Table 15. Bass Filter (4) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 0 : 0 0 1 1 : 1 1 0 0 : 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 1 : 0 0 0 1 : 0 1 1 0 : 1 0 Bass Steps -15.5dB -15.0dB : -0.5 dB 0dB 0dB +0.5 dB : +15.0 dB +15.5 dB ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 0 1 1 Bass Q-Factor 1.0 1.25 1.5 2.0 0 1 0 1 Table 16. Mixing Programming (5) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 0 1 1 0 1 0 1 0 1 0 1 O 0 1 0 1 0 1 Mixing Mute enable Mixing Source Beep MD1 MD2 FM mono Mixing Target Speaker LF off Speaker LF on Speaker RF off Speaker RF on Speaker LR off Speaker LR on Speaker RR off Speaker RR on Loudness Main/2nd 2nd Main 43/57 TDA7405 Table 17. SoftMute (6) MSB D7 LSB D6 D5 D4 D3 D2 D1 0 1 0 0 1 1 FUNCTION D0 SoftMute On (Mute) Off MuteTime 0.48 ms 0.96 ms 123 ms 324 ms 0 1 0 1 Influence on Stereodecoder Highohmic-Mute on off ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 1 Influence on Pilot-detector Hold and MP-Hold on off 0 1 Influence on SoftMute on off 0 1 0 0 1 1 Beep Frequencies 500 Hz 780 Hz 1.8 kHz 19 kHz 0 1 0 1 Table 18. VoiceBand (7) MSB D7 LSB D6 D5 D4 D3 D2 D1 0 1 0 1 0 1 0 0 0 1 1 1 1 1 O 0 1 0 1 44/57 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 FUNCTION D0 Voice-Band Low-Pass Enable Filter off Filter on Voice-Band Low-Pass Frequency 3 kHz 6 kHz Voice-Band High-Pass Enable Filter off 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 TDA7405 Table 19. Second Source Selector (8) MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 FUNCTION Source Selector FD1 / SE2 SE3 FD2 SE1 MD2 MD1 / SE4 Stereodecoder AM Input Gain 0dB 1dB : 14dB 15dB Mute off on ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 0 : 1 1 0 0 : 1 1 0 0 : 1 1 0 1 : 0 1 0 1 Table 20. Equalizer (9) MSB D7 O 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D6 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D5 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D4 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 D3 D2 D1 LSB D0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 FUNCTION Frequencies EQ Low-Filter 63 Hz 74 Hz 88 Hz 105 Hz 125 Hz 149 Hz 177Hz 210 Hz 250 Hz 297 Hz 353 Hz 421 Hz 500 Hz 595 Hz 707 Hz 841 Hz Frequencies EQ High-Filter 297 Hz 353 Hz 421 Hz 500 Hz 595 Hz 707 Hz 841 Hz 1.0 kHz 1.19 kHz 1.41 kHz 1.68 kHz 2.0 kHz 2.38 kHz 2.83 kHz 3.36 kHz 4.0 kHz 45/57 TDA7405 Table 21. EQ-Configuration / Bass (10) MSB D7 LSB D6 D5 D4 D3 0 0 1 1 D2 D1 D0 0 0 1 1 0 1 0 1 FUNCTION EQ Filter Rear Path no Filter High-Filter Low-Filter High+Low-Filter EQ Filter Front Path no Filter High-Filter Low-Filter High+Low-Filter 0 1 0 1 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b AM Noisebl. SoftUnMute On Off 0 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 Bass Center-Frequency 60Hz 80Hz 70Hz 90Hz 100Hz 130Hz 150Hz 200Hz 0 1 0 1 0 1 0 1 Table 22. Compander (11) MSB D7 LSB D6 D5 D4 D3 0 0 1 1 0 0 1 1 0 0 0 0 1 1 1 1 O 0 1 0 1 0 1 0 1 0 1 D1 D0 0 0 1 1 0 1 0 1 FUNCTION Activity / Reference Level off 0.5VRMS 1VRMS 2VRMS Attack-Times 6ms 12ms 24ms 49ms Release-Times 390ms 780ms 1.17s 1.56s 0 1 0 1 0 0 1 1 0 0 1 1 D2 0 1 0 1 SoftStep-Time1) 160µs 320µs 640µs 1.28ms 2.56ms 5.12ms 10.2ms 20.4ms Compander max. Gain 29dB 19dB Note: 1. The SoftStep-Times are only programmable while the Compander is not used. 46/57 TDA7405 Table 23. Configuration Audioprocessor I (12) MSB D7 LSB D6 D5 D4 D3 D2 D1 FUNCTION D0 0 1 Compander Source Main Selector Second Source Selector SoftStep off on 0 1 Main Loudness flat Filter ON 0 1 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b Second Loudness flat Filter ON 0 1 0 0 1 1 0 0 1 1 Front Speaker Mute Second Source internal coupled Main Source AC-coupled Main Source internal coupled 0 1 0 1 Rear Speaker Mute Second Source internal coupled Main Source AC-coupled Main Source internal coupled 0 1 0 1 Table 24. Configuration Audioprocessor II (13) MSB D7 LSB D6 D5 D4 D3 D2 D1 0 1 0 0 1 1 0 1 0 0 1 1 O 0 1 0 1 0 1 0 1 0 1 0 1 FUNCTION D0 Pause Detector off on Pause ZC Window 160mV 80mV 40mV not allowed FD1 Mode single ended differential FD1 Attenuation -12dB -6dB -6dB 0dB FD2 Attenuation -6dB 0dB MD1 Mode single ended differential 47/57 TDA7405 Table 25. Equalizer Low-Filter (14) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 0 : 0 0 1 1 : 1 1 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 1 : 0 1 1 0 : 1 0 Gain / Attenuation -15dB -14dB : -1dB 0dB 0dB +1dB : +14dB +15dB ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 0 1 1 Equalizer Q 1 2 3 4 0 1 0 1 Pause-Detector Source Rear Input-Selector Front Input-Selector 0 1 Table 26. Equalizer High-Filter (15) MSB LSB FUNCTION D7 D6 0 0 1 1 O 0 1 48/57 D5 0 1 0 1 D4 D3 D2 D1 D0 0 0 : 0 0 1 1 : 1 1 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 1 : 0 1 1 0 : 1 0 Gain / Attenuation -15dB -14dB : -1dB 0dB 0dB +1dB : +14dB +15dB Equalizer Q 1 2 3 4 Switch Qual.-Detector Noise Content Off On TDA7405 Table 27. Speaker, Subwoofer and Mixer Level-Control (16-20) The programming of all Speaker-, Subwoofer and Mixing Level-Controls are the same. MSB LSB ATTENUATION D7 D6 D5 D4 D3 D2 D1 D0 1 : 1 1 0 0 : 0 0 : 0 0 0 : 0 0 0 0 : 0 0 : 1 1 0 : 0 0 0 0 : 0 0 : 0 0 0 : 0 0 0 0 : 0 1 : 0 0 1 : 0 0 0 0 : 1 0 : 1 1 1 : 0 0 0 0 : 1 0 : 1 1 1 : 0 0 0 0 : 1 0 : 1 1 1 : 1 0 0 1 : 1 0 : 0 1 +15 dB : +1 dB 0 dB 0 dB -1 dB : -15 dB -16 dB : -78 dB -79 dB x 1 1 x x x x x Mute ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b Table 28. Testing Audioprocessor (21) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 0 0 0 1 1 1 1 0 1 0 1 O 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 Audioprocessor Testmode off on Test-Multiplexer Compander Log-Amp. Output Compander Low-Pass Output Compander DAC Output 200kHz Oscillator not allowed AM NB Mute NB-Hold internal Reference Compander Testmode off on Clock external internal AZ Function off on SC-Clock Fast Mode Normal Mode Note : This byte is used for testing or evaluation purposes only and must not set to other values than "11101110" in the application! 49/57 TDA7405 Table 29. Stereodecoder (22) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 0 1 1 0 1 0 1 STD Unmuted STD Muted IN-Gain 11dB IN-Gain 8.5dB IN-Gain 6dB IN-Gain 3.5dB 0 1 Input AM-Pin Input MPX-Pin ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 1 Forced MONO MONO/STEREO switch automatically 0 1 0 0 0 1 1 0 1 1 Pilot Threshold HIGH Pilot Threshold LOW Deemphasis Deemphasis Deemphasis Deemphasis 50µs (37.5µs1) 62.5µs (46.9µs1) 75µs (56.3µs1) 100µs (75µs1) Note: 1. If Deemphasis-Shift enabled (Subaddr.26/Bit7 = 0) Table 30. Noiseblanker I (23) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 0 0 0 1 1 1 1 0 0 1 1 O 0 0 1 1 50/57 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 Noiseblanker off Noiseblanker on Low Threshold 65mV Low Threshold 60mV Low Threshold 55mV Low Threshold 50mV Low Threshold 45mV Low Threshold 40mV Low Threshold 35mV Low Threshold 30mV Noise Noise Noise Noise Controlled Controlled Controlled Controlled Threshold Threshold Threshold Threshold 320mV 260mV 200mV 140mV Overdeviation Adjust 2.8V Overdeviation Adjust 2.0V Overdeviation Adjust 1.2V Overdeviation Detector OFF TDA7405 Table 31. Noiseblanker II (24) MSB D7 LSB D6 D5 D4 D3 D2 D1 0 1 0 0 1 1 FUNCTION D0 PEAK charge current low high Fieldstrength adjust 2.3V 1.8V 1.3V OFF 0 1 0 1 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 0 1 1 0 0 1 1 Blank Time FM / AM 38µs / 1.2ms 25.5µs / 800µs 32µs / 1.0s 22µs / 640µs 0 1 0 1 Noise Rectifier Discharge Resistor R = infinite RDC = 56k RDC = 33k RDC = 18k 0 1 0 1 Strong Multipath influence on PEAK 18k off on (18k discharge if VMPout< 2.5V) 0 1 Table 32. AM / FM-Noiseblanker (25) MSB D7 LSB D6 D5 D4 D3 D2 D1 0 1 0 0 0 0 1 1 1 1 0 0 1 1 O 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 FUNCTION D0 Stereodecoder Mode FM AM AM Rectifier Gain 6dB 8dB 10dB 12dB 14dB 16dB 18dB 20dB Rectifier Cut-Off Frequency 14.0kHz 18.5kHz 28.0kHz 56.0kHz Overdeviation Time Constant on off AM Blank-Mode High-Ohmic Mute Sample&Hold 51/57 TDA7405 Table 33. High-Cut (26) MSB D7 LSB D6 D5 D4 D3 D2 D1 0 1 0 0 1 1 FUNCTION D0 High-Cut off on max. High-Cut 2dB 5dB 7dB 10dB 0 1 0 1 VHCH to be at 42% REF5V 50% REF5V 58% REF5V 66% REF5V ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 0 1 1 0 0 1 1 0 1 0 1 VHCL to be at 16.7% VHCH 22.2% VHCH 27.8% VHCH 33.3% VHCH 0 1 0 1 Deemphasis Shift On Off 0 1 Table 34. Fieldstrength Control (27) MSB D7 LSB D6 O D5 0 0 1 1 0 0 1 1 52/57 0 1 0 1 D4 0 1 0 1 D3 D2 D1 D0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 FUNCTION VSBL to be at 20.0% REF5V 23.3% REF5V 26.6% REF5V 30.0% REF5V 33.3% REF5V 36.6% REF5V 40.0% REF5V 43.3% REF5V 46.6% REF5V 50.0% REF5V 53.3% REF5V 56.6% REF5V 60.0% REF5V 63.3% REF5V 66.6% REF5V 70.0% REF5V Quality Detector Coefficient a=0.7 a=0.85 a=1.0 a=1.15 HCC-Level-Shift (only Level through MPD) 0.0V 500mV 1.0 V 1.5 V TDA7405 Table 35. Multipath Detector (28) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 0 1 1 Fast Load on off Bandpass Gain 6dB 12dB 16dB 18dB 0 1 0 1 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 0 1 1 Rectifier Gain Gain = 7.6dB Gain = 4.6dB Gain = 0dB disabled 0 1 0 1 Charge Current at MP-Out 0.25µA 0.50µA 0 1 Multipath on High-Cut Decay-Time 2ms 10ms 0 1 Multipath influence on PEAK Discharge off -1V/ms 0 1 Table 36. Stereodecoder Adjustment (29) MSB LSB FUNCTION D2 D1 D0 0 0 0 : 0 : 0 0 0 0 : 1 : 1 0 0 1 : 0 : 1 0 1 0 : 0 : 1 Roll-Off Compensation not allowed 7.2% 9.4% : 13.7% : 20.2% 1 1 1 : 1 : 1 0 0 0 : 1 : 1 0 0 1 : 0 : 1 0 1 0 : 0 : 1 not allowed 19.6% 21.5% : 25.3% : 31.0% D7 O D6 0 0 0 : 1 D5 0 0 0 : 1 D4 0 0 1 : 1 D3 0 1 0 : 1 LEVEL Gain 0dB 0.4dB 0.8dB : 6dB 53/57 TDA7405 Table 37. Stereodecoder Configuration (30) MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 1 0 1 1 x 1 x FUNCTION Multipath Influence on High-Cut On Off Multipath Influence on Stereo-Blend On Off Level-Input over Multipath-Detector1 On Off Dual MPX Mode On Off Weak-Signal-Mute on off WSMute Threshold 0.3 V 0.5V WS-Mute-Depth -20 dB -24 dB -28 dB -32 dB ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 0 1 0 1 0 1 0 0 1 1 0 1 0 1 Note: 1. Using the Multipath Time-Constants for Stereo-Bland and High-Cut Table 38. Testing Stereodecoder(31) MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 O 0 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 FUNCTION Main Testmode off on Stereodecoder Testmode off on Testsignals F228 NB threshold Level for Stereo-Blend Pilot magnitude VHCCL Pilot threshold VHCCH REF5V HOLDN NB Peak AM-Rectifier VCOCON; VCO Control Voltage VSBL Pilot threshold Level for High-Cut REF5V Audioprocessor Oscillator Off On Disable Noiseblanker @ FS > 2.5V On Off Note : This byte is used for testing or evaluation purposes only and must not set to other values than "11111100" in the application 54/57 TDA7405 Figure 40. TQFP44 (10 x 10) Mechanical Data & Package Dimensions mm inch DIM. MIN. TYP. A MAX. MIN. TYP. 1.60 A1 0.05 A2 1.35 B 0.30 C 0.09 D 11.80 D1 9.80 OUTLINE AND MECHANICAL DATA MAX. 0.063 0.15 0.002 0.006 1.40 1.45 0.053 0.055 0.057 0.37 0.45 0.012 0.015 0.018 0.20 0.004 12.00 12.20 0.464 0.472 0.480 10.00 10.20 0.386 0.394 0.401 0.008 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b D3 8.00 0.315 E 11.80 12.00 12.20 0.464 0.472 0.480 E1 9.80 10.00 10.20 0.386 0.394 0.401 E3 8.00 0.315 e 0.80 0.031 L 0.45 0.60 L1 0.75 0.018 1.00 k 0.024 0.030 TQFP44 (10 x 10 x 1.4mm) 0.039 0˚(min.), 3.5˚(typ.), 7˚(max.) D D1 A A2 A1 23 33 34 22 0.10mm .004 B 12 44 11 1 C e L O E B E1 Seating Plane K TQFP4410 0076922 D 55/57 TDA7405 Table 39. Revision History Date Revision Description of Changes October 2001 1 First Issue May 2004 2 modified Electrical Characteristics and Stylesheet ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b O 56/57 TDA7405 ) s ( t c u d o s) r ( P t c e u t e l od o s Pr b O ete l ) o s ( s t b c u -O d o s) r P ( t e uc t e l od o s Pr b O te e l o s b 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. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. O The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners © 2004 STMicroelectronics - All rights reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States www.st.com 57/57