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TDA7409 数据表(PDF) 18 Page - STMicroelectronics |
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TDA7409 数据表(HTML) 18 Page - STMicroelectronics |
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18 / 25 page ![]() TDA7409 18/25 2.5.3 Volume Note 2: 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. 2.5.4 Treble Programming MSB LSB ATTENUATION D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 X 0 0 0 0 1 0 0 0 1 1 X 0 0 1 1 1 0 0 1 1 1 X 0 1 0 1 1 0 1 0 1 0 1 X Gain/Attenuation not allow not allow +30.0dB +29.0dB : +1.0dB 0.0dB - 1.0dB - 2.0dB : -78.0dB -79.0dB Mute 0 Must BE “0” MSB LSB BASS & TREBLE PROGRAMMING D7 D6 D5 D4 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 Treble Steps 15dB 14dB 13dB 12dB 11dB 10dB 9dB 8dB 7dB 6dB 5dB 4dB 3dB 2dB 1dB 0dB 0 1 Mode Cut Boost X X X X 0 0 1 1 0 1 0 1 Treble Center Frequency 10KHz 12.5KHz 15KHz 17.5KHz |
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