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TDA7402 Fiches technique(PDF) 6 Page - STMicroelectronics

No de pièce TDA7402
Description  Car radio signal processor
Download  71 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
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TDA7402 Fiches technique(HTML) 6 Page - STMicroelectronics

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Figure 1.
PIN connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 3.
Input-stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 4.
Loudness attenuation @ fP = 400Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 5.
Loudness center frequencies @ Attn. = 15dB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 6.
1st and 2nd order loudness @ Attn. = 15dB, fP=400Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 7.
Softmute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 8.
SoftStep timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 9.
Bass control @ fC = 80Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 10.
Bass center frequencies @ gain = 14dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 11.
Bass Quality factors @ Gain = 14dB, fC = 80Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 12.
Bass normal and DC Mode @ Gain = 14dB, fC = 80Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 13.
Treble Control @ fC = 17.5kHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 14.
Treble center frequencies @ gain = 14dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 15.
Subwoofer application with LPF 80/120/160Hz and HPF 90/135/180Hz . . . . . . . . . . . . . . 25
Figure 16.
Voiceband application with HPF 300/450/600/750Hz and LPF 3k/6kHz . . . . . . . . . . . . . . 25
Figure 17.
Compander block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 18.
Compander characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 19.
Output selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 20.
Application 1 using internal highpass and mono low pass filter . . . . . . . . . . . . . . . . . . . . . 29
Figure 21.
Application 2 using internal highpass and external stereo low pass filter . . . . . . . . . . . . . . 30
Figure 22.
Application 3 using pure external filtering (e.g. DSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 23.
Output selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 24.
Vn timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 25.
Trigger threshold vs. VPEAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 26.
Deviation controlled trigger adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 27.
Field strength controlled trigger adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 28.
Block diagram of stereo decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 29.
Signals during stereo decoder's SoftMute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 30.
Signal control via SoftMute pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 31.
Internal stereo blend characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 32.
Relation between internal and external LEVEL voltages for setup of stereo blend . . . . . . 43
Figure 33.
Highcut characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 34.
Block diagram of the noise blanker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 35.
Block diagram of the multipath detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 36.
Dual MPX input diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 37.
Application diagram (standard configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 38.
Application diagram (Dual MPX mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 39.
LQFP44 (10x10) Mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . 69


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