AK4563A Datasheet, PDF (13/39 Pages) Asahi Kasei Microsystems – Low Power 16bit 4ch ADC & 2ch DAC with ALC

ASAHI KASEI
[AK4563A]
„ Digital High Pass Filter (HPF)
The ADC has HPF for the DC offset cancel. The cut-off frequency of HPF is 3.7Hz (@fs=48kHz) and it is -0.15dB at
20Hz. It also scales with the sampling frequency (fs).
„ Audio Serial Interface Format
Data is shifted in/out the SDTI/SDTO0, 1 pins using BCLK and LRCK inputs. Four serial data are selected by the DIF0
and DIF1 pins as shown in Table 1. In all modes, the serial data is MSB-first, 2's compliment format and it is latched by
“↑” of BCLK.
When DIF1= “0” and DIF0=”1”, only BCLK=64fs is acceptable.
No. DIF1 bit DIF0 bit SDTO0/SDTO1(ADC) SDTI(DAC)
0
0
0
MSB justified
LSB justified
1
0
1
LSB justified
LSB justified
2
1
0
MSB justified
MSB justified
3
1
1
I²S compatible
I²S compatible
Table 1. Audio Data Format
BCLK
≥ 32fs
= 64fs
≥ 32fs
≥ 32fs
Figure
Figure 9
Figure 10
Figure 11
Figure 12
RESET
LRCK
0 1 23
BCLK(32fs)
8 9 10 11 12 13 14 15 0 1
23
8 9 10 11 12 13 14 15 0 1
SDTO(o)
SDTI(i)
15 14 13 8 7 6 5 4 3 2 1 0 15 14 13 8 7 6 5 4 3 2 1 0 15
0 1 23
BCLK(64fs)
14 15 16 17 18
31 0 1 2 3
14 15 16 17 18
31 0 1
SDTO0,1(o) 15 14 13 13 2 1 0
15 14 13 1 2 1 0
15
SDTI(i)
Don’t Care
15 14
15:MSB, 0:LSB
Lch Data
10
Don’t Care
15 14
Rch Data
10
Figure 9. Audio Data Timing (No.0)
LRCK
012
BCLK(64fs)
15 16 17 18 19 20
31 0 1 2
15 16 17 18 19 20
31 0 1
SDTO0,1(o)
15
15 14 13 12 4 1 0
15
15 14 13 12
1 0 19
SDTI(i)
Don’t Care
15:MSB, 0:LSB
15 14 13 12
Lch Data
10
Don’t Care
15 14 13 12
Rch Data
10
Figure 10. Audio Data Timing (No.1)
MS0067-E-02
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2004/12