TDA7404 ST Microelectronics, TDA7404 Datasheet
TDA7404
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TDA7404 Summary of contents
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... FOUR INDEPENDENT SPEAKER-OUTPUTS SUBWOOFER STEREO OUTPUT DIGITAL CONTROL C-BUS INTERFACE AUDIO-FILTER CHARACTERISTICS PROGRAMMABLE DESCRIPTION The TDA7404D is a high performance signal proces- sor specificall designed for car radio applications. The device includes a high performance audiopro- BLOCK DIAGRAM MIX DiffinL Diffgnd DiffinR SE1L ...
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... TDA7404D SUPPLY Symbol Parameter V Supply Voltage s I Supply Current s SVRR Ripple Rejection @ 1KHz THERMAL DATA Symbol R Thermal Resistance Junction-pins max Th j-pins ABSOLUTE MAXIMUM RATINGS Symbol V Operating Supply Voltage s T Operating Temperature Range amb T Storage Temperature Range stg ESD All pins are protected against ESD according to the MIL883 standard. ...
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... Speaker 4 independent speaker controls in 1dB steps control range 50dB with mute Zero crossing attenuate Subwoofer Stereo output attenuator range 50dB Mute Functions direct mute digitally controlled Soft Mute with 4 programmable mute-times TDA7404D 3/26 ...
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... TDA7404D ELECTRICAL CHARACTERISTICS (V specified) 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 STEP V DC Steps DC V Remaining offset with AutoZero offset P DIFFERENTIAL STEREO INPUTS R Input Resistance ...
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... High Threshold for SM - Pin TH high R Internal pull-up resistor PU V Pull-Up Voltage PU Test Conditions Main / Mix-Source Main / Mix-Source Main / Mix-Source Main / Mix-Source G = -20 to +20dB G = -80 to -20dB Adjacent Steps From 0dB to G MIN TDA7404D Min. Typ. Max. Unit 0/00 dB -8.5/- -3.5/- -2.5/- dB 10.6 9.6 8.6 -5/-5 -6/-6 -7/-7 dB -11/- -12/- -13/- dB 1.5 2 ...
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... TDA7404D ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter SOFT STEP T Switch time SW 1) Center frequency 2.4KHz makes 1KHz bottom frequency at low & high frequency boost condition. 2) The SM-Pin is active low (Mute = 0) BASS CONTROL C Control Range RANGE A Step Resolution STEP f Center Frequency C Q Quality Factor ...
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... RMS bass, treble at +12dB; a-weighted 2.6V O RMS all stages 0dB IN RMS internal pass only Bass & Treble = OUT RMS 12dB -20dB -20 to -60dB V TDA7404D Min. Typ. Max. Unit - 0. +20 mV 2.20 2.60 V RMS ...
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... CD-inputs (see Figure 1). In the meantime there are some CD-players in the market which have a significant high source-impedance which effects strongly the common-mode-rejection of the normal differential input stage. The additional buffer of the TDA7404D Diff -input avoids this drawback and offers the full common-mode-rejection even with those CD-players. ...
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... In some cases, for example if the uP is executing a refresh cycle of the IIC-Bus-programming 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 TDA7404D could be switched in the AutoZero-Remain-Mode (I2 bit 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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... TDA7404D Figure 3. Loudness Attenuation @ 1.4.2 Center Frequency Figure 4 shows the three possible peak-frequencies 400Hz , 800Hz and 2.4kHz. Figure 4. Loudness Center frequencies @ Attn. = 15dB 10/26 = 400Hz ...
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... For timing purposes the Bit 0 of the I2C-bus output register is set to 1 from the start of muting until the end of de-muting. Figure 6. Softmute-Timing Note: Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal. = 2.4KHz TDA7404D - 11/26 ...
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... TDA7404D 1.6 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. Four programmable soft step time from one step to the next, are user selectable ...
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... Center Frequency Figure 9 shows the four possible center frequencies 60, 80 ,100 and 200Hz. Figure 9. Bass center Frequencies @ Gain = 15dB 1.7.3 Quality Factors Figure 10 shows the four possible quality factors 1, 1.25, 1.5 and 2. Figure 10. Bass Quality factors @ Gain = 14dB 80Hz 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10 100.0 1.0K TDA7404D - 10.0K 13/26 ...
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... TDA7404D 1.7.4 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 11. 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. ...
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... Figure 13 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz. Figure 13. Treble Center Frequencies @ Gain = 15dB 1.9 External AC - Coupling TDA7404D has external AC - coupling terminals which can be selected one of two positions behind the Mixing stage or Bass filter. Figure 14. External AC - Coupling ...
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... TDA7404D The External AC - Coupling is selected in position of four switches controlled by the lower 2bit in the Others selection. (See table) Others selection SW3 = ON , SW4 = ON (selected internal pass), SW1 = b , SW2 = open 0 1 SW3 = OFF , SW4 = ON, SW1 = a , SW2 = SW3 = ON , SW4 = OFF, SW1 = b , SW2 = b 1 ...
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... TDA7404D 1 1 /2). DD FUNCTION 0 1 Zero cross / Soft Mute Zero Cross available Soft Mute available 2 AutoZero Remain off on 3 Testmode off on 4 Auto-Increment Mode off on Input Selector / Gain Loudness ...
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... TDA7404D 2.5 DATA BYTE SPECIFICATION 2.5.1 Input Selector / Gain MSB ...
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... TDA7404D ATTENUATION Gain/Attenuation not allow not allow +30.0dB +29.0dB : +1.0dB 0.0dB - 1.0dB - 2.0dB : -78.0dB -79.0dB Mute Diffin - mode Single ended stereo Differential Stereo BASS & TREBLE PROGRAMMING Treble Steps 15dB ...
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... TDA7404D 2.5.5 Bass Programming MSB Note 3: For more information please refer to section Bass description 2.5.6 Speaker Attenuator Left Front MSB ...
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... TDA7404D ATTENUATION Attenuation -23 dB -24.5dB -26 dB -28 dB -30 dB -32 dB -35 dB -40 dB -50 dB Speaker Mute ATTENUATION / Soft Step Time Attenuation -23 dB -24.5dB -26 dB ...
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... TDA7404D 2.5.9 Speaker Attenuator Right Rear MSB 2.5.10 Subwoofer Attenuator (Left & Right) MSB ...
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... Must be "1" for Auto zero Internal Beep Off ON LSB FUNCTION D 0 Mute 0 enable SoftMute 1 disable SoftMute Mute/Zero Cross-Times 0.48ms 0.96ms 30.7ms / 9ms 122.8ms / 37ms Mixing-Source Beep Phone Mixing-Level (Main / Mix-Source) -12 / -2.5dB -6 / -6dB -3.5 / -9.6dB 0 / Beep Frequency 781Hz 1.56KHz Not allow 1.8KHz FUNCTION TDA7404D 23/26 ...
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... Testing MSB Figure 15. TDA7404D Application Circuit SE1L TapeL 100n SE1R TapeR 100n SE2L FM_L 100n SE2R FM_R 100n SE3L AM_L 100n AM_R SE3R 100n MONO+ Phone 100n MONO - PhoneGnd 100n ...
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... DIM. MIN. TYP. MAX. MIN. A 2.65 a1 0.1 0.3 0.004 b 0.35 0.49 0.014 b1 0.23 0.32 0.009 C 0 (typ.) D 17.7 18.1 0.697 E 10 10.65 0.394 e 1.27 e3 16.51 F 7.4 7.6 0.291 L 0.4 1.27 0.016 S 8 (max.) inch MECHANICAL DATA TYP. MAX. 0.104 0.012 0.019 0.013 0.020 0.713 0.419 0.050 0.65 0.299 0.050 TDA7404D OUTLINE AND SO28 25/26 ...
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... TDA7404D 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 ...