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AK7735EQ датащи(PDF) 97 Page - Asahi Kasei Microsystems |
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AK7735EQ датащи(HTML) 97 Page - Asahi Kasei Microsystems |
97 / 142 page [AK7735] 016014707-E-00 2016/12 - 97 - ■ ADC Block 1. ADC Block High Pass Filter The AK7735 has a digital high pass filter (HPF) for DC offset cancelling of each ADC. The cut-off frequency of the HPF is about 0.9Hz (fs=48kHz), depending on operation frequency. 2. ADC Digital Volume The AK7735 has independent digital volume controls for Lch and Rch (256 levels, 0.5dB steps) of each ADC. ADC1 VOLAD1L[7:0] ADC1 VOLAD1R[7:0] ADC2 VOLAD2L[7:0] ADC2 VOLAD2R[7:0] Attenuation Level 00h 00h 00h 00h +24.0dB 01h 01h 01h 01h +23.5dB 02h 02h 02h 02h +23.0dB : : : : : 2Fh 2Fh 2Fh 2Fh +0.5dB 30h 30h 30h 30h 0.0dB (default) 31h 31h 31h 31h -0.5dB : : : : : FDh FDh FDh FDh -102.5dB FEh FEh FEh FEh -103.0dB FFh FFh FFh FFh Mute (- ∞) Table 49. ADC Digital Volume Control Setting The transition time between set values is selected by ATSPAD bit. Mode ATSPAD bit Transition Time 0 0 4/fs (default) 1 1 16/fs Table 50. ADC Volume Level Transition Time The transition between set values is soft transition. It takes 1020/fs (21.3ms@fs=48kHz) from 00h to FFh(MUTE) in Mode 0. If the PD N pin goes to “L”, the volume of each ADC channel is initialized to 30h. ATSPAD bit 00h ⇔ FFh Transition Time LRCK Cycle fs=48kHz fs=44.1kHz fs=8kHz 0 1020/fs 21.3ms 23.1ms 127.5ms (default) 1 1020/fs x4 85.0ms 92.5ms 510.0ms Table 51. ADC Volume Transition Time from 00h to FFh |
Аналогичный номер детали - AK7735EQ |
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Аналогичное описание - AK7735EQ |
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