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AK7735EQ Arkusz danych(PDF) 95 Page - Asahi Kasei Microsystems |
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AK7735EQ Arkusz danych(HTML) 95 Page - Asahi Kasei Microsystems |
95 / 142 page [AK7735] 016014707-E-00 2016/12 - 95 - 1-3. Start-up Time of MIC Input Pin The AK7735 starts to charge a DC cut capacitor when the PDN pin is set to “H” from “L”. Since the input impedance is 25k Ω, the time constant will be 25ms if the DC cut capacitor is 1µF. A wait time of about 100ms should be taken before power up the ADC to charge the DC cut capacitor sufficiently. A click noise may occur just after the ADC is powered up if this wait time is not enough. 2. Microphone Input Selector The AK7735 has microphone input selectors. Each microphone amplifier input is selectable between single-ended input and differential input by AD1LSEL bit or AD1RSEL bit. AIN1L / INP1 pin AK7735 MIC-Amp Rch INN1 pin ADC Lch AD1LSEL bit MIC-Amp Lch ADC Rch AIN1R / INP2 pin INN2 pin AD1RSEL bit Figure 70. Microphone Input Selector AD1LSEL bit ADC Lch AD1RSEL bit ADC Rch 0 INP1/INN1 (default) 0 INP2/INN2 (default) 1 AIN1L 1 AIN1R Table 47. Microphone Input Selector Note * 79. When using differential input mode, it is prohibited to input signal to only one side like pseudo differential input. |
Podobny numer części - AK7735EQ |
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Podobny opis - AK7735EQ |
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