TDA7438 STMicroelectronics, TDA7438 Datasheet
TDA7438
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TDA7438 Summary of contents
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... IN 1.0dB STEPS FOR BALANCE FACILITY – -INDEPENDENT MUTE FUNCTION ALL FUNCTION ARE PROGRAMMABLE VIA SERIAL BUS 2 DESCRIPTION The TDA7438 is a volume tone (bass, middle and treble) balance (Left/Right) processor for quality audio applications in car-radio and Hi-Fi systems. Figure 2. Block Diagram 3 L-IN1 ...
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... TDA7438 Table 2. Absolute Maximum Ratings Symbol V Operating Supply Voltage S T Operating Ambient Temperature amb T Storage Temperature Range stg Figure 3. Pin Connection Table 3. Thermal Data Symbol R Thermal Resistance Junction-pins th j-pins Table 4. Quick Reference Data Symbol V Supply Voltage S V Max. input signal handling ...
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... Test Condition THD = 0.3% The selected input is grounded through a 2.2 capacitor -24dB -24 to -47dB -24dB -24 to -47dB V adjacent attenuation steps from 0dB to A max V Max. Boost/cut Max. Boost/cut Max. Boost/cut TDA7438 Min. Typ. Max. Unit 100 K 2 2.5 Vrms 80 100 dB -1 ...
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... TDA7438 Table 5 (continued) Symbol Parameter SPEAKER ATTENUATORS C Control Range RANGE S Step Resolution STEP E Attenuation Set Error A E Tracking Error Step DC A Mute Attenuation mute AUDIO OUTPUTS V Clipping Level CLIP R Output Load Resistance L R Output Impedance Voltage Level DC GENERAL (Gain, Bass, Treble, Middle Controls Flat) ...
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... Both of them have 1dB step resolution. The very high resolution allows the implementation of systems free from any noisy acoustical effect. The TDA7438 audioprocessor provides 3 bands tones control. 3.1 Bass, Middle Stages The Bass and the middle cells have the same structure. ...
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... TDA7438 The fig.5 refers to basic T Type Bandpass Filter starting from the filter component values (R1 internal and R2,C1,C2 external) the centre frequency Fc, the gain Av at max. boost and the filter Q factor are computed as follows: Viceversa, once Fc, Av, and Ri internal value are fixed, the external components values will be ...
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... Figure 8. Channel separation vs. frequency Figure 9. Bass response Figure 10. Treble response Figure 11. Middle response Figure 12. Typical tone response TDA7438 7/19 ...
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... TDA7438 BUS INTERFACE Data transmission from microprocessor to the TDA7438 and vice versa takes place through the 2 wires I C BUS interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage 2 must be connected). 4.1 Data Validity As shown in fig. 12, the data on the SDA line must be stable during the high period of the clock. The HIGH and LOW state of the data line can only change when the clock signal on the SCL line is LOW ...
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... ACK = Acknowledge S = Start P = Stop A = Address B = Auto Increment 5.1 EXAMPLES 5.1.1 No Incremental Bus The TDA7438 receives a start condition, the correct chip address, a subaddress with the (no incre- mental bus), N-data (all these data concern the subaddress selected), a stop condition. Figure 17. CHIP ADDRESS MSB LSB S ...
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... TDA7438 Figure 18. . CHIP ADDRESS MSB LSB D96AU422 Table 6. POWER ON RESET CONDITION INPUT SELECTION INPUT GAIN VOLUME BASS MIDDLE TREBLE SPEAKER 6 DATA BYTES Address = 88 HEX (ADDR:OPEN). Table 7. FUNCTION SELECTION: First byte (subaddress) MSB INCREMENTAL BUS ACTIVE INCREMENTAL BUS X = DON’T CARE Figure 19. INPUT SELECTION ...
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... TDA7438 LSB INPUT GAIN D1 D0 2dB STEPS 0 0 0dB 0 1 2dB 1 0 4dB 1 1 6dB 0 0 8dB 0 1 10dB 1 0 12dB 1 1 14dB 0 0 16dB 0 1 18dB 1 0 20dB 1 1 22dB 0 0 24dB 0 1 26dB 1 0 28dB 1 1 30dB LSB VOLUME ...
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... TDA7438 Table 10. BASS SELECTION MSB Table 11. MIDDLE SELECTION MSB 12/ LSB BASS D1 D0 2dB STEPS 0 0 -14dB 0 1 -12dB 1 0 -10dB 1 1 -8dB 0 0 -6dB 0 1 -4dB 1 0 -2dB 1 1 0dB 1 1 0dB 1 0 2dB 0 1 4dB 0 0 6dB 1 1 8dB 1 0 10dB ...
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... TDA7438 LSB TREBLE D1 D0 2dB STEPS 0 0 -14dB 0 1 -12dB 1 0 -10dB 1 1 -8dB 0 0 -6dB 0 1 -4dB 1 0 -2dB 1 1 0dB 1 1 0dB 1 0 2dB 0 1 4dB 0 0 6dB 1 1 8dB 1 0 10dB 0 1 12dB 0 0 14dB LSB SPEAKER ATTENUATION ...
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... TDA7438 Figure 20. PINS 20K CREF 20K Figure 21. PINS: 26 ROUT LOUT 20 A D96AU434 Figure 22. PINS 100K V REF 14/19 Figure 23. PINS MUXOUT D96AU430 Figure 24. PINS Figure 25. PINS: 10 MOUT(L) D96AU425 MOUT( GND D96AU491 INL INR 33K D96AU427 V REF 25K D96AU431 ...
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... Figure 26. PINS: 10 25K MOUT(L) MOUT(R) Figure 27. PINS: 12 BIN(L) BIN(R) Figure 28. PINS: 13 44K BOUT(L) BOUT(R) Figure 29. PINS: 18 BIN(L) D96AU431 BIN(R) Figure 30. PIN 44K D96AU428 Figure 31. PINS D96AU429 V S 44K 20 A SCL D96AU424 20 A SDA D96AU423 TDA7438 20 A D96AU428 15/19 ...
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... TDA7438 Figure 32. DIP28 Mechanical Data & Package Dimensions mm DIM. MIN. TYP. MAX. a1 0.63 b 0.45 b1 0.23 0.31 b2 1.27 D 37.34 E 15.2 16.68 e 2.54 e3 33.02 F 14.1 I 4.445 L 3.3 16/19 inch MIN. TYP. MAX. 0.025 0.018 0.009 0.012 0.050 1.470 0.598 0.657 0.100 1.300 0.555 ...
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... C 0 (typ.) D 17.7 18 10.65 e 1.27 e3 16.51 F 7.4 7.6 L 0.4 1. (max.) inch MIN. TYP. MAX. 0.104 0.004 0.012 0.014 0.019 0.009 0.013 0.020 0.697 0.713 0.394 0.419 0.050 0.65 0.291 0.299 0.016 0.050 OUTLINE AND MECHANICAL DATA SO-28 TDA7438 17/19 ...
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... TDA7438 Table 14. Revision History Date Revision January 2004 June 2004 18/19 6 First Issue in EDOCS DMS 7 Changed the Style-sheet in compliance to the new “Corporate Technical Pubblications Design Guide” Description of Changes ...
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