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AK7735EQ Datasheet(PDF) 23 Page - Asahi Kasei Microsystems |
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AK7735EQ Datasheet(HTML) 23 Page - Asahi Kasei Microsystems |
23 / 142 page [AK7735] 016014707-E-00 2016/12 - 23 - 4. Short Delay Slow Roll-Off Filter (ADSD bit = “1”, ADSL bit = “1”) fs=48kHz Parameter Symbol Min. Typ. Max. Unit SHORT DELAY SLOW ROLL-OFF Passband * 25 0dB ~ -0.074dB PB 0 12.5 kHz -3.0dB PB 19.2 kHz Stopband * 25 SB 36.5 kHz Stopband Attenuation SA 85.0 dB Group Delay Distortion : 0Hz~20kHz GD 2.6 1/fs Group Delay * 26 GD 6 1/fs ADC Digital Filter(HPF) Frequency Response -3.0dB FR 0.9 Hz fs=96kHz Parameter Symbol Min. Typ. Max. Unit SHORT DELAY SLOW ROLL-OFF Passband * 25 0dB ~ -0.074dB PB 0 25 kHz -3.0dB PB 38.5 kHz Stopband * 25 SB 73.0 kHz Stopband Attenuation SA 85.0 dB Group Delay Distortion : 0Hz~40kHz GD 2.6 1/fs Group Delay * 26 GD 6 1/fs ADC Digital Filter(HPF) Frequency Response -3.0dB FR 1.9 Hz fs=192kHz Parameter Symbol Min. Typ. Max. Unit SHORT DELAY SLOW ROLL-OFF Passband * 25 0dB ~ -0.1dB PB 0 31.1 kHz -3.0dB PB 63.2 kHz Stopband * 25 SB 145.9 kHz Stopband Attenuation SA 85.0 dB Group Delay Distortion : 0Hz~40kHz GD 0.5 1/fs Group Delay * 26 GD 7 1/fs ADC Digital Filter(HPF) Frequency Response -3.0dB FR 3.8 Hz Notes * 25. The passband and stopband frequencies are proportional to fs (sampling rate). High-pass filter characteristics are not included. A reference value of each gain amplitude is the maximum value of frequency response. * 26. Delay time caused by the digital filter calculation. This time is measured from an analog signal input until 24-bit data of both channels are set into the output register. It includes group delay by HPF. |
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