AK4520A Datasheet, PDF (11/19 Pages) Asahi Kasei Microsystems – 100dB 20Bit Stereo ADC & DAC

ASAHI KASEI
[AK4520A]
„ Digital High Pass Filter
The ADC of AK4520A has a digital high pass filter for DC offset cancel. The cut-off frequency of the HPF is
0.9Hz at fs=44.1kHz and also scales with sampling rate(fs).
„ De-emphasis filter
The DAC of AK4520A includes the digital de-emphasis filter(tc=50/15us) by IIR filter. This filter corresponds to
three frequencies (32kHz,44.1kHz,48kHz). The de-emphasis filter selected by DEM0 and DEM1 is enabled for
input audio data. The de-emphasis is also disabled at DEM0="1" and DEM1="0".
DEM 1 DEM0
Mode
0
0
44.1kHz
0
1
OFF
1
0
48kHz
1
1
32kHz
Table 3 . De-emphasis filter control
0163-E-00
- 11 -
1997/3