AK4589 데이터 시트보기 (PDF) - Asahi Kasei Microdevices

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AK4589

2/8-Channel Audio CODEC with DIR

Asahi Kasei Microdevices 

ASAHI KASEI

[AK4589]

LRCK1

Fs

176.4kHz

192.0kHz

128fs

22.5792

24.5760

MCLK (MHz)

192fs

-

-

256fs

-

-

BICK1 (MHz)

64fs

11.2896

12.2880

Table 5. System Clock Example (Quad Speed Mode @Manual Setting Mode)

(Note: At Quad speed mode (DFS1= “1”, DFS0 = “0”) are not available for ADC.)

MCLK

512fs

256fs

128fs

Sampling Speed

Normal

Double

Quad

Table 6. Sampling Speed (Auto Setting Mode)

LRCK1

fs

32.0kHz

44.1kHz

48.0kHz

88.2kHz

96.0kHz

176.4kHz

192.0kHz

128fs

-

-

-

-

-

22.5792

24.5760

MCLK (MHz)

256fs

-

-

-

22.5792

24.5760

-

-

512fs

16.3840

22.5792

24.5760

-

-

-

-

Sampling

Speed

Normal

Double

Quad

Table 7. System Clock Example (Auto Setting Mode)

De-emphasis Filter

The AK4589 includes the digital de-emphasis filter (tc=50/15µs) by IIR filter. De-emphasis filter is not available in

Double Speed Mode and Quad Speed Mode. This filter corresponds to three sampling frequencies (32kHz, 44.1kHz,

48kHz). De-emphasis of each DAC can be set individually by register data of DEMA1-C0 bits (DAC1: DEMA1-0 bits,

DAC2: DEMB1-0 bits, DAC3: DEMC1-0 bits, DAC4: DEMD1-0 bits, see “Register Definitions”).

Mode

0

1

2

3

Sampling Speed

Normal Speed

Normal Speed

Normal Speed

Normal Speed

DEM1

0

0

1

1

DEM0

0

1

0

1

DEM

44.1kHz

OFF

48kHz

32kHz

Default

Table 8. De-emphasis control

Digital High Pass Filter

The ADC has a digital high pass filter for DC offset cancel. The cut-off frequency of the HPF is 1.0Hz at fs=48kHz and

scales with sampling rate (fs).

MS0339-E-00

- 26 -

2004/09

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