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AK4647VN Datasheet(PDF) 10 Page - Asahi Kasei Microsystems |
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AK4647VN Datasheet(HTML) 10 Page - Asahi Kasei Microsystems |
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10 / 72 page  ASAHI KASEI [AK4647] MS0566-E-00 2006/11 - 10 - FILTER CHARACTERISTICS (Ta=25 °C; AVDD, DVDD=2.6 ∼ 3.6V; HVDD=2.6 ∼ 5.25V; fs=44.1kHz; DEM=OFF; FIL1=FIL3=EQ=OFF) Parameter Symbol min typ max Units ADC Digital Filter (Decimation LPF): Passband (Note 22) ±0.16dB PB 0 - 17.3 kHz −0.66dB - 19.4 - kHz −1.1dB - 19.9 - kHz −6.9dB - 22.1 - kHz Stopband SB 26.1 - - kHz Passband Ripple PR - - ±0.1 dB Stopband Attenuation SA 73 - - dB Group Delay (Note 23) GD - 19 - 1/fs Group Delay Distortion ΔGD - 0 - μs ADC Digital Filter (HPF): (Note 24) Frequency Response (Note 22) −3.0dB FR - 0.9 - Hz −0.5dB - 2.7 - Hz −0.1dB - 6.0 - Hz DAC Digital Filter (LPF): Passband (Note 22) ±0.1dB PB 0 - 19.6 kHz −0.7dB - 20.0 - kHz −6.0dB - 22.05 - kHz Stopband SB 25.2 - - kHz Passband Ripple PR - - ±0.01 dB Stopband Attenuation SA 59 - - dB Group Delay (Note 23) GD - 22 - 1/fs DAC Digital Filter (LPF) + SCF: Frequency Response: 0 ∼ 20.0kHz FR - ±1.0 - dB DAC Digital Filter (HPF): (Note 24) Frequency Response (Note 22) −3.0dB FR - 0.9 - Hz −0.5dB - 2.7 - Hz −0.1dB - 6.0 - Hz BOOST Filter: (Note 25) MIN 20Hz FR - 5.76 - dB 100Hz - 2.92 - dB 1kHz - 0.02 - dB MID 20Hz FR - 10.80 - dB 100Hz - 6.84 - dB 1kHz - 0.13 - dB MAX 20Hz FR - 16.06 - dB 100Hz - 10.54 - dB Frequency Response 1kHz - 0.37 - dB Note 22. The passband and stopband frequencies scale with fs (system sampling rate). For example, ADC is PB=0.454*fs (@-1.0dB). Each response refers to that of 1kHz. Note 23. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the 16-bit data of both channels from the input register to the output register of the ADC. This time includes the group delay of the HPF. For the DAC, this time is from setting the 16-bit data of both channels from the input register to the output of analog signal. Group delay of DAC part is 22/fs(typ) at PMADL=PMADR bits = “0”. Note 24. When PMADL bit = “1” or PMADR bit = “1”, the HPF of ADC is enabled but the HPF of DAC is disabled. When PMADL=PMADR bits = “0”, PMDAC bit = “1”, the HPF of DAC is enabled but the HPF of ADC is disabled. Note 25. These frequency responses scale with fs. If a high-level and low frequency signal is input, the analog output clips to the full-scale. |
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