AK4520 View Datasheet(PDF) - Asahi Kasei Microdevices

Part Name

Description

Manufacturer

AK4520

100dB 20Bit Stereo ∆Σ ADC & DAC

Asahi Kasei Microdevices 

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

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